Golfclub Kromme Rijn

GEO Certified® 09/2013 GEO Re-Certified 09/2016
Telephone: +31(0) 30 6562051

The 9 holes golf course Kromme Rijn, or the Brakel as it is officially called, is laid out on approx. 28 ha. In 2005 they were awarded as one of the first with the Committed Green Label of the Dutch Golf Federation, and are now in for their 2nd GEO renewal. Since many years small but highly competent group of volunteers of the golf club have worked on all the themes within GEO program. Nowadays, golf club Kromme Rijn can been seen as one of the front runners in sustainable golf course management, especially with respect to the energy and water…

Adrie van Der Werf, GEOSA, Accredited Verifier Read verifier report.

GEO Certified® Report

GEO Certified® is the symbol of great golf environments worldwide – designating that a golf facility has met a credible standard in the areas of nature, water, energy, supply chain, pollution control, and community, and is committed to continually improve. GEO Certified® is widely trusted and endorsed by a growing number of organizations and people, both inside and outside golf.

Click below to read about the activities undertaken by this golf facility to operate sustainably.

Facility details

Golf Courses
Golfbaan Kromme Rijn (9 holes, 5798 metres, year opened 1998)
1 Clubhouse(s)
1 Maintenance Facility/Facilities
1 Pro Shop
1 Practice Facility/Facilities


Brakel golf course, home of Golfclub Kromme Rijn, is located in province of Utrecht within the municipality of Bunnik. The golf course was designed by architect Gerard Jol and includes a 9-holes course on 28 hectares of terrain. It opened in 1998. Construction saw a lot of interference from the authorities. Several conditions were imposed concerning landscape and natural values that created extra requirements for the golf club. The club has been participant in the NGF environmental programme since 2005. The terrain used to be flat farmland on the banks of the river Kromme Rijn hence the soil is rich river clay. Over the years some 850 trees have been planted and three large ponds and some undulation created. It is juxtaposed to an estate that has some pastures and a small forest.

Since the creation of the golfcourse we have seen a steady increas in the diversity of species. It is very difficult to find experts on the various flora and fauna species so we have decided to concentrate on the number and kind of birds and mushrooms. The underlying idea is that if these populations are healthy, the rest of the habitat must be good too. We do take special care for some species such as grass snakes and marsh orchids. But also special care is provided for our swan couple.

We aim to maintain diversity of plants and birds and make every effort to keep the grass snakes on the premises.

The specific targets for the next period are as follows:
1 Maintain the quality (condition of fairways and greens) of the golf course at the current level.
2 Reduce energy (electricity and gas) consumption by 5%/yr
3 Reduce use of fertiliser by 40% over the period compared to the average use of the past six years. We believe this is achievable with the smart sprinkler system that has been installed.

Since the last reaudit in 2013 there has been a major change in the structure of the golfclub. In order to cope with the developments in the golfworld the club has been converted to a private limited company. This greatly enhanced the finances and over the past two years major investments have been made.

We only provide english text in the boxes of this website since everyone who may access the site will have no problems understanding english. The uploaded documents however are in Dutch.

Consultation & Surveys

This golf facility consults the following organizations regarding landscape heritage conservation:

  • Golfcourse architect Gerard Jol
  • Grontmij Utrecht, Zeist, april 1995
  • NMU (Natuur- en milieufederatie Utrecht)
  • Dutch Outdoor Concepts (Maurice Evers).
  • Lumbricus (Maurice Evers)

The following landscape assessments and surveys have been undertaken at this golf facility:

Title Author Date View document
Natuurlijke inrichting en beheer golfterrein de Brakel Grontmij 1995/04/03 Download
uitwerkingsplan De Brakel door Grontmij febr 1996 Grontmij 1996/02/01 Download
quickscan green door IPC Schoenakers 2009/05/01 Download
Boekje Committed to Green 2009 Golfclub Kromme Rijn 2009/09/01 Download
Natuurbeheer Stichting De Brakel gedurende 2012, (latest yearly monitoring report to council and NMU) Golfclub Kromme Rijn 2013/01/31 Download
Monitor resultaten versus streefbeelden en doelsoorten 2008 Golfclub 2009/03/01 Download
Monitoring golfclub Kromme Rijn by Dutch Outdoor Concepts (Maurice Evers). 3x/year, only last analyses report of 1 green uploaded. Maurice Evers 2012/10/31 Download
Monitoring golfclub Kromme Rijn by Dutch Outdoor Concepts (Maurice Evers). 3x/year, only last report on quality uploaded. Maurice Evers 2013/05/17 Download
Natuurbeheer Stichting De Brakel 2013 Golfclub Kromme Rijn 2014/02/04 Download
Doelstellingen Kromme Rijn 2013 Golfclub Kromme Rijn 2013/12/23 Download
Quickscan flora en fauna Realisatie poel en tee Buiting Advies 2014/02/03 Download
Snoeiplan 2014-2016 Golfclub Kromme Rijn 2014/02/03 Download
Natuurbeheer Golfbaan Kromme Rijn 2014 Golfclub Kromme Rijn 2015/02/02 Download
Analyseverslag Golf GREEN Kromme rijn Dutch Outdoor Concepts 2015/01/05 Download
Kwaliteitbeoordeling Kromme Rijn (example) Dutch Outdoor Concepts 2015/07/31 Download
Trends in speelkwaliteit golfbaan Kromme Rijn Dutch Outdoor Concepts 2015/10/16 Download
Snoeiplan 2016-2018 Golfclub Kromme Rijn 2016/03/01 Download
Kwaliteits beoordeling Kromme Rijn Lumbricus (Maurice Evers) 2016/05/04 Download
Natuurbeheer Golfbaan Kromme Rijn 2015 Golf course Kromme Rijn 2016/03/01 Download
Fertigation at Golf Course Kromme Rijn Bunnik The Netherlands Hein Vader 2016/08/16 Download

This golf facility consults the following organizations regarding ecosystem protection and enhancement:

  • NMU
  • Council of Bunnik
  • Dutch Outdoor Concepts
  • Buiting advies

The following ecological surveys have been undertaken at this golf facility:

Title Author Date View document
Evaluatie monitoring Dr Ir Leo Otto 2010/03/01 Download
Amphibians Werkgroep Natuurlijk Zeist-West 2007/08/08 Download

Rare, protected and notable species occurring at this golf facility:

Local name Scientific name
distelbremraap Orobanche reticulata
zwanenbloem Butomus umbellatus
dotterbloem Caltha palustris
rietorgis Dactylorhiza majalis subsp. praetermissa
brede wespenorchis Epipactis helleborine
Water Drieblad Menyanthes trifoliata
Egelantier Rosa rubiginosa
Weidehavikskruid Hieracium caespitosum Hieracium caespitosum
Zeegroene zegge Carex flacca
groene specht Picus viridis ssp. Viridis
Ringslang Natrix natrix

This golf facility regularly monitors the following species as indicators of environmental quality:

Local name Scientific name
riet orchis Dactylorhiza majalis subsp. praetermissa

Habitats & Designations

This golf facility features the following landscape designations:

Description Designating Authority
Historic Landscapes / Parklands Council of Bunnik

Area of habitats / vegetation types, and associated designations at this golf facility:

Title Estimated Area (Hectares) Designation
Rough 'ecological' grassland 1.3 Self Appointed
Scrub Vegetation 4.5 Self Appointed
Native Woodland 13.5 Self Appointed
Wetlands 1 Self Appointed
Open Water Features 2 Self Appointed


Size and estimated species composition of amenity turfgrass maintained at this golf facility.

Estimated Area (Hectares) Turfgrass Species Sward Composition (%)
Greens 0.8 Hectares Agrostis tenuis / capillaris 40%
Festuca rubra 10%
Tees 0.3 Hectares Lolium perenne 45%
Festuca rubra 20%
Fairways 4.0 Hectares Lolium perenne 30%
Festuca rubra 30%
Semi Rough 2.0 Hectares Lolium perenne 30%
Festuca rubra 30%

These turfgrasses are optimal for the circumstances at this club because:
These turfgrasses are optimal for the circumstances at this club because: On the greens we use Struisgras (Agrostis capillaris) and Roodzwenkgras (Festuca Rubra) and try to fight back the Straatgras (Poa Annua) since the latter is very susceptible to Fusarium, a dreadful mold in the greens during and after winter. We do that by measuring the moistcontent and keep it as low as feasible. Fertilisation is also kept to a bare minimum. (EC values <0.6)

This golf facility assesses mowing patterns every: 1 months

This golf facility consults the following individuals / organizations regarding its grassing plan:

  • Dutch Outdoor Concepts monitors the quality of our turf 3x/year (Maurice Evers).
  • Lumbricus (Maurice Evers)

This golf facility is making the following efforts to manage the playing quality expectations of customers:

Activity Description
Establishing clear internal policies for irrigation, fertilization, colour, cutting heights, overseeding etc We have elaborate plans to maintain the grass based on measured values such as moisture, EC values. Mowing plans are updated yearly and monitored monthly. A minimum of two greenkeepers is certified on mowing techniques and the use of fertilisers.
Promoting the playing quality values of more naturalized turf, particularly fairways and semi-rough We aim to find a good balance between nature and golf for both low and high handicappers.
Promoting the financial benefits of presenting sustainable surfaces The choices for the design and maintenance of various elements are transparent and accessible to members. Regular publication via the website or club newsletter addresses any issue. There is a continuous balancing act between available financial resources and quality of the course.
Improving customer understanding around greens maintenance Golfers are informed through various means concerning maintenance activities on the course. Major maintenance is also displayed on the website and passed on by the caddymasters.. The club issues monthly a newsletter. This venue is often used to educate the customers on maintenance issues.
Demonstrating the direct relationship between environmental best practice and year round high quality playing surfaces We often communicate via our website and posters to our members and visitors.

Conservation & Enhancement

This golf facility is undertaking the following activities to conserve landscape character:

Activity Description
Allowing seasonal variation of course coloration and texture In 2014 we have installed a system of intelligent sprinklers with the possibility to add nutrients . Control of pH is also possible now by adding acids to the watersupply. The fairways and greens have improved significantly in quality since 2014.
Appropriately matching mowing lines to contours Emphasis on clear definition of fairways is laid down in the yearly mowing plan.
Protection and restoration of historic features We maintain our historic apple orchard carefully and have planted some younger trees in 2011 in order to ensure continuation of the orchard for many years. These are now (2016) growing very well. The complete golfcourse has been designated by European regulations as archeologically significant.
Discreet on-course signage and furniture The terrain furniture has been selected with care and is maintained accordingly. We use NGF standard signage on our course.
Conservation of specimen trees All trees are planted over the last 20 years. Our aim is to let the strongest ones grow to monumental trees, the rest around it is kept low to create low brush (up to some 3-4 m) to provide habitat for fauna and stimulate flora. This maintains the beautiful scenery of the course.
Screening and softening unsightly man-made features Constructions that do not correlate to the landscape (such as the barn that houses all greenkeeping equipment) are being obscured through vegetation.

This golf facility is undertaking the following activities to improve the landscape ecology of the golf course:

Activity Description
Minimizing the amount of amenity grass We try to keep the greens as dry as feasible so the growth of Poa Annua will be slowed down.
Increasing the size of habitat patches Several areas are designated as biotopes to develop and golfers should not go there. This is to protect e.g. our Orchis and grass snakes. We provide nesting for the many birds and insects.
Connection of internal habitat patches We have connected our lakes via a ditch and large ducts.
Connection of patches with external habitats Not only are our internal habitat patches largely connected, they also connect to surrounding areas of ecological habitats.
Creation of habitat corridors The golf course is not located in a national natural ecological corridor. But we ensure that woodlands of our terrain are juxtaposed to wooded areas of the surrounding estates.
Avoidance of habitat fragmentation We are a small golfclub with a terrain of 29 hectares. There is only so much one can do!
Improving and diversifying habitat edges We have gentle slopes into the lakes to stimulate various habitats. Our diversity in flora is growing all the time and we see an increase in species of birds. Our mowing plan also takes into account the breeding season and avoids the rough in that period.

This golf facility is undertaking the following activities to improve the quality of habitats on the golf course:

Activity Description
Creation of botanically rich rough grassland Several areas are mowed 2-3x/year and the cuttings are removed in order to avoid enriching the soil. A few designated areas have been sown with a variety of flowering plants to accomodate butterflies and other insects.
Ecologically informed management of scrub vegetation Captain of Green has completed a HAS course in 's Hertogenbosch. Greenkeepers are certified and some are professional farmers of fruit orchards. There is very frequent contact with companies such as Outdoor Concepts/Lumbricus and Buiting Advies.
Promoting species and structurally diverse woodlands Our careful tree pruning programme stimulates flora and fauna.
Establishment of littoral shelves and marginal vegetation in wetland areas Natural and gentle banks have been realised in different locations in order to stimulate the flora and fauna in water and its banks.
Maintenance of an appropriate balance of open water and aquatic vegetation Our small pool which contains lots of frogs and toads is kept open by a cleaning programme which removes excessive growth on a rotational basis. This ensures sufficient 2-year old reeds and open water.

This golf facility is undertaking the following activities to conserve and enhance biodiversity on the golf course:

Activity Description
Provision of nesting and nectar for pollinators Brushwood, roughs, forest edges and ditches are present at various locations. In 2015 a local beekeeper was looking for an untreated natural orchard and we allowed him to put some beehives in our apple orchard. According to him this was extremely successful with a high honey harvest.
Installation of nest boxes We provide 20 birds nest boxes and clean those each year. In 2015, all had been used for nesting. We protect the nesting area of our swans and each year they raise 3-6 offspring.
Provision of feeding tables We supplement the feeding of our waterbirds and chickens during the winter period.
Control / management of alien species A certified game warden occasionally shoots rabbits and if there is too much damage from foxes, they also will be hunted. The foxes have eradicated several times our population of chickens that we let roam the parking lot.
Provision of hibernation areas We have a designated area for the grass snakes where we dump some cuttings and provide shelter. On several locations in the wooded areas we also make ridges of stacked branches to provide shelter and habitat.
Creation of micro-habitats (eg log and stone piles) We try to help butterflies in some areas by promoting flora that flowers early and specific for various species.
We lay down rows of cut off branches to provide shelter for small fauna.


Our water use is in three categories:
1 restaurant and clubhouse that use municipal water from the tap and the restaurant has certified equipment to avoid getting fats and solids into the sewers.
2 The greenkeepers clean their equipment with municipal water and have a dedicated sewage system to avoid run-off from reaching the municipal sewer. If possible they use riverwater to clear the cuttings from their machines.
3 we sprinkle the greens as required based on measured values for conductivity. Water from the river next to our golfcourse is used for that and we have municipal permission to do so. The nitrogen content of the riverwater is measured continuously and we adjust the amount of fertiliser to the required level, thus saving on fertiliser.
The water quality of our waters is measured each year and these data are published in the earlier mentioned monitoring report.

In the latter part of 2014 a new dual irrigationsystem (fairways and greens separated) has been installed, and this came into use during 2015. The controllers of the old installation are no longer accessible. Data of 2013 and 2014 are therefore not available, but should be similar (dependent on wheater conditions) to the levels known from 2009-2012 and estimates have been entered in the tables below. The numbers apply only to the greens . Fairways were only watered during extreme droughts to prevent the grass from dying.
In 2015 a total of 6.926.617 liters of river water has been used. Please note that from 2015 this includes water for the fairways. In the past only the greens were irrigated and we conclude (based on the 2015 data) that in inclusion of the fairways during the 2015, irrigation did not lead to a larger consumption of river water. Each of the 220 intelligent sprinklerheads can be activated individually when required!

Our target for the next period is to reduce municipal water usage by some 5% over the average use of the past 3 years.

Sources & Consumption

The following water audits have been undertaken at this golf facility:

Title Author Date View document
water analysis from various points Vitens 2012/10/12 Download
water analysis from various points Vitens 2015/10/19 Download

The water used at this golf facility is drawn from the following sources:

2015 Source(s) % of supply Total Consumption
Clubhouse(s) Public / Potable 100% 1,184 Cubic Metres
Golf Course Surface 100% 6,926 Cubic Metres
2014 Source(s) % of supply Total Consumption
Clubhouse(s) Public / Potable 100% 1,062 Cubic Metres
Golf Course Surface 100% 7,500 Cubic Metres
2013 Source(s) % of supply Total Consumption
Clubhouse(s) Public / Potable 100% 991 Cubic Metres
Golf Course Surface 100% 7,500 Cubic Metres

Irrigation & Efficiency

The following areas receive irrigation at this golf facility:

Greens 2-3 days per week
Tees 2-3 days per week
Fairways Weekly
Semi-Rough Weekly
Rough Never

The irrigation system at this golf facility is:
Fully computer controlled

The irrigation system at this golf facility is:

Serviced every 1 years

Re-calibrated and checked for efficient application every 3 months

This golf facility is undertaking the following activities to maximize irrigation efficiency:

Activity Description
Selection of grass species The grasses promoted can handle drought better than the Poa Annua.
Soil decompaction and thatch management Fairways, tees and greens are frequently decompacted according to an elaborate management system.
Timing and dose of water application Dependent on measured moistcontent. This is measured very frequently on the greens.
Fairways maybe watered to take advantage of some peaks in nitrogen content of the riverwater.
Analysis of soil moisture Daily measurement by an electronic device which measures the conductivity and is calibrated whenever required (as indicated by the apparatus). During the season the calibration is approximately 1x/month.
Incorporation of evapotranspiration rates and weather data Weatherforecast is taken into account. We also have our own weather monitoring system.
Use of wetting agents Used locally 6x/year
Overall reduction in irrigated area With our new and SMART irrigationsystem we can sprinkle when and where necessary based on measurements of the soil.
Targeting of sprinkler heads During the season adjusted and calibrated twice.
Optimizing system pressure The irrigation system is the most modern one available in the market and could be run fully automatic. We choose to do it semi automatic, each of the 210 intelligent sprinklerheads may be activated independently via smartPhone or computer.

Adoption of cutting edge nozzle technology See above, we have an intelligent system with the latest SMART sprinklerheads. (Toro).

This golf facility is undertaking the following activities to conserve / reduce / minimize water consumption:

Activity Description
Low-flow urinals and toilets Toilets are equipped with water-saving buttons during the renovation of the clubhouse in 2016.
Use of water efficient appliances Kitchen equipment contains modern water-saving elements.
Use of efficient shower technology Water saving showerheads.
Repairing leaks We have no leaks and if they occur they will be repaired immediately!
Water awareness signage Signage to indicate this is a waterwin area.


We use gas and electricity in the clubhouse and for the pumps to water the greens and fairways. Over the years we have upgraded the lighting from standard to energy saving bulbs to LED technology. The clubhouse uses high efficiency heaters. We use approach switches and there is a timer on the LED beamers for the driving range. Parking area is lit minimally and switched off as soon as feasible. We have a contract for the provision of sustainable energy with a certified provider.
Since we can only choose between m3 and liters I have opted for m3. Hence the diesel consumption is around 8 m3 per year. There are no exact data on this since all the use is by our contracted greenkeepers who fill up their vehicles as required. Some of these vehicles and engines may also be used elsewhere.

Our target for the next period is to reduce the annual consumption of the various energy components by 5 %/yr compared to the average of the past 3 years.

Sources & Consumption

No energy surveys have been undertaken at this golf facility.

Consumption of renewable energy and resources at this golf facility:

2015 2014 2013
Renewable Grid Electricity (kWh) 116573 109625

Consumption of non-renewable energy and resources at this golf facility:

2015 2014 2013
Diesel (Cubic Metres) 8 8 8
Natural Gas (Cubic Metres) 16688 16373
Petrol (Cubic Metres) 0.2 0.2 0.2

Energy Efficiency

This golf facility is undertaking the following activities to diversify energy and fuel supply:

Activity Description
Adoption of green tariff grid supply Contract in place for green energy from the utility. All electricity is provided by Electrabel and is 'green', 10% wind, 70% waterpower, 20 % biomass.
Installation of photovoltaic and / or solar panels A return powerline has been laid from the new greenkeeper's warehouse to the clubhouse for future use of solar panels that might be placed on the warehouse. At this time it still is economically unattractive.
Use of electric hybrid vehicles The buggies are electrically powered.

This golf facility is undertaking the following activities to reduce energy consumption:

Activity Description
Investment in low-energy heating and air conditioning systems High efficiency heaters employed. Airconditioning used minimally and only when essential.
Optimizing thermostat levels for heating and refrigeration Levels of heating and cooling are arranged centrally, but can also be regulated in separate areas in order to prevent unnecessary heating or cooling.
Upgrading of building insulation Not required since our clubhouse is very modern and built to the highest standards.
Installation of low-energy lighting Use of LED in all areas of the clubhouse now completed.
Use of motion sensor lighting Approach sensors are used for the lighting in the locker rooms and in the toilets as well as for the area for the greenkeepers.
Transition to energy efficient appliances LED beamers have been installed on the driving range. Total wattage is 1.35 kW and this is less than one beamer (of many) at the adjacent soccerfields! A timer is installed so it switches off automatically after 45 minutes.
Use of timers with appliances, heating and lighting See above. Same goes for the heating system of the clubhouse.
Educating staff and customers The staff is made aware of the effects of activities with regard to energy usage.

Vehicles & Transport

The maintenance fleet at this golf facility uses the following fuel sources:

Ride-on Mowers Walking Mowers Utility Vehicles
Petrol 100%
Diesel 83% 100%
Grid Electric 17%

Additional vehicles operated by this golf facility use the following fuel sources:

Golf Carts Cars Buses
Grid Electric 100%

This golf facility has established the following schemes to encourage reductions in staff and customer transport emissions:

Activity Description
Car sharing incentives We promote car pooling for our competition teams.
We provide local storage for golfclubs so members can cycle to the course.
Secure cycle parking yes
Increasing equipment storage (e.g. lockers) The locker room has been expanded to allow for the storage of not only the bags but also of the trolleys.
Staff showers Showers are available in the green-keepers shed.

Supply Chain

Within European tendering rules we aim to maximise use of local contractors and products. We have contracted a caterer for the restaurant and he subcontracts local suppliers for his requirements. The greenkeeper has won a tender for looking after our course for another 5 year period. This is under close supervision of our Captain of Green.

Our target for the next period is to maintain or improve the number of local suppliers and we aim to reduce the amount of fertiliser by 40% compared to the past 3 years. This ambitious goal should be achievable with our modern sprinkling system.

A short note on our fertigation project has been uploaded under the title 'Fertigation at Golf course Kromme Rijn, Bunnik, The Netherlands'

Purchasing Policies

This golf facility undertakes the following ethical / environmental purchasing activities:

Activity Description
Use of local suppliers Local suppliers are used for the purchasing of various products.
Use of local products Various regional products are offered on the restaurant menu.
Selection of certified products Only certified suppliers of goods and services are allowed.
Selection of products that feature minimal packaging In order to minimise packaging waste, purchasing is done in bulk and containers as much as possible.
Use of accredited suppliers (e.g. ISO 14001) Certified suppliers are preferred.

Supply Chain

An overview of the supplier network at this golf facility:

Total number of suppliers Total number of suppliers within 10 Kilometres Total number of suppliers within 100 Kilometres
Food & Beverage 5 4 1
Maintenance Equipment 10 8 2
Course Supplies 5 5

Turfgrass Inputs

This golf facility undertakes the following IPM activities:

Activity Description
Encouraging drought and disease tolerant grasses As mentioned before we aim to use grasses that can handle some drought. This also minimises Poa Annua and with that the Fusarium. Water is therefore used minimally and based on measured values. Added benefit is less leaching.
Managing stress and wear Damage and wear and tear are avoided as much as possible by means of a good maintenance plan. Paths of grit are laid on strategic places and buggies are now GPS programmed to stay within certain limits. During winter the greens are closed and buggies/trolleys not allowed on the course.
Enhancement of soil structure Soil structure is improved by frequent decompacting and vertical mowing.
Optimization of the growing environment An optimal growth environment is cultivated through a good and actual maintenance plan and through expert advice.
Managing surface moisture During the season the moist content is measured on a daily basis and used to decide whether to sprinkle.
Establishing thresholds for pests and disease Only fungi are the only pests that are controlled chemical means. We only use this minimally and obviously only with certified products. For the future, methods of maintenance will be developed to phase out chemicals all together.
Scouting for pests and diseases Our captain of green as well as the certified greenkeepers will report immediately in case of a problem and jointly decide on measures to be taken.
Monitoring / improvement of plant health We receive a quarterly report on the state of health of the turf from Lumbricus. Some examples are uploaded and mentioned before.

Fertilizer use at this golf facility in the last three years (kg):

2015 2014 2013
Fairways - K - Organic 22 25 19
Fairways - N - Organic 63 65 47
Fairways - P - Organic 35 35 25
Greens - K - Inorganic 43 79 72
Greens - K - Organic 178 184 169
Greens - N - Inorganic 45 50 52
Greens - N - Organic 113 119 126
Greens - P - Inorganic 12 12 11
Greens - P - Organic 27 29 27
Tees - K - Organic 169 172 183
Tees - N - Organic 177 182 214
Tees - P - Organic 66 52 52

Pesticide use at this golf facility in the last three years (kg):

2015 2014 2013
Fairways - Herbicide - Total Weight 0.95 1.615 2.375
Greens - Fungicide - Total Weight 0 0 0
Greens - Herbicide - Total Weight 0 0 0
Greens - Insecticide - Total Weight 0 0 0
Tees - Herbicide - Total Weight .05 0.085 0.125

This golf facility undertakes the following actions to optimize pesticide use:

Activity Description
Selection on the least toxic and lest persistent products Least toxic products are chosen, if possible even biological and natural products. There is a strong pressure from the authorities and the NGF to minimise. The law is being adapted and we follow the law.
Selection of appropriate products for specific pests and diseases The correct substances are chosen as a result of the expertise present on diseases and pests.
Spot-treatment with handheld sprayers and wipers Only fungi are treated locally. The data shown are for the whole fairway in kg/ha. We do not use herbicides anymore and let the clover grow,
Calibration and testing of sprayers The ideal measurement is chosen depending on the substances used and the type of weather, thereby realising usage- and dispersion optimisation.
Use of shrouded sprayer and anti-drip nozzles Spraying is done with anti-drip nozzles and only by certified greenkeepers.
Non-chemical weed control Weeds are not treated anymore, except for extra mowing and manual removal.
Use of organic and biological products to improve plant health and resistance. The fairways and tees only receive organic fertiliser, for the greens this is ca 70% organic.

Waste Management

No waste audits have been undertaken at this golf facility.

This golf facility manages key waste streams as follows:

Re-use Recycle Landfill Incinerate
Glass false true false false
Plastic false true false false
Aluminium false true false false
Metal false true false false
Paper & Cardboard false true false false
Grass Clippings true false false false
Cores & Turf true false false false
Sand true false false false
Wood / Timber true false false true

This golf facility undertakes the following activities to continue the lifecycle of materials and resources:

Activity Description
Separation of recyclable materials Various recycling bins are provided and used. These are collected by a certified waste handler. We separate as much as feasible at source, the rest is done by the Dutch wastehandling system which separates further and recycles where possible.
Establishment of recycling centers Various containers are located centrally on the terrain in order to separate waste removal.
Returning clipping to fairways and walkways Fairway grass is not removed but remains on the fairway.
Education of staff and customer education Greenkeepers are certified.

Pollution Control

Since we are already quite a few years Committed to Green (CtG), we aim to minimise the use of pesticides. The use of MCPP to fight clover has been discontinued. Use of fertiliser is also kept to a bare minimum to avoid leaching and run-off into the lakes. We monitor the water quality of the lakes and groundwater. At the inception of the golfcourse we had a covenant with the local council and NMU that we would monitor flora and fauna for 10 years. We have done so and we witnessed a spectacular increase in diversity and numbers of wildlife. Therefore it was our own decision to continue monitoring and join the CtG. And in 2010 we were certified GEO, in 2013 recertified.

Our target for the next period is to phase out pesticides over the coming 3 years according to the Green Deal.

Water Analysis

This golf facility monitors water quality with the following frequency:

Chemical Biological Visual
Inflow Daily Never Never
On-Site Yearly Never Weekly
Outflow Never Never Never

Waste Water

Waste water from this golf facility is managed as follows:

Discharges to Formal Discharge Agreement
Golf Course Stream N/A
Clubhouse Via Oil Separator Yes
Maintenance Facility Via Oil Separator Yes
Wash Pad Via Oil Separator Yes

Hazardous Materials

Hazardous materials at this golf facility are handled and disposed of as follows:

Secure Storage Registered Uplift
Detergents true false
Cooking Oils false true
Lubricants true true
Pesticide Containers true true
Fertiliser Bags true true
Oil Filters true true
Batteries true true

Pollution Prevention

This golf facility undertakes the following activities to prevent pollution from its maintenance facility and clubhouse:

Activity Description
Storage of equipment and hazardous products on covered, sealed impervious areas Dangerous substances are stored in a certified cabinet.
Maintenance of equipment on covered, sealed impervious areas Large machine maintenance is outsourced whereas small maintenance is conducted on a fluid-sealed floor with certified weirs to stop oil and fat entering the sewage system. This also holds true for the restaurant kitchen.
Mixing of pesticides and fertilizers in covered areas Yes
Mixing of pesticides and fertilizers over impervious surfaces Fertilisers are mixed on a fluid-sealed floor.
Installation of above-ground fuel tanks The fuel tank meets all criteria and is periodically checked.
Installation of sufficient secondary containment for fuel The drip container of the fuel tank meets all legislative criteria and is large enough.
Provision of containment booms and absorbent materials There is plenty of absorption material present and within reach.

This golf facility undertakes the following activities to prevent pollution on its golf course:

Activity Description
Eliminating leachate and run-off through careful timing of turf inputs Weather forecasts are closely watched to determine the ideal timing for the application of pesticides and fertilisers.
Establishment of vegetative buffer strips around water bodies No substances are used in the bank zone of water elements (at least 3m from the water line). And we have many reed borders to additionally help filter run-off water.
Controlling erosion and sediment discharge We clean the ditches in a very controlled manner to avoid damage to flora and fauna. Water handling in these ditches and growth of flora is optimised and balanced. Usually this means only one side is cleaned one time, the other side the next. Erosion is controlled by planting vegetation.
Establishment of pesticide-free zones No-spray zones have been determined across the entire terrain.
Use of swales and bio-filters to slow and treat surface run-off Our reeds and swales clean water run-off from the course.


The Golfbaan Kromme Rijn has outsourced its restaurant facility. Its exploitation is under strict supervision of the management. Golf course maintenance has been outsourced and the Captain of Green oversees and controls its activities. The golf school is run by two independently operating pros and this golfschool has received a certificate of the NGF. The employees listed in this document include all staff working at the Golfbaan Kromme Rijn, whether directly or indirectly employed. It includes the contract greenkeepers team (2.7 fte) of which 2 fulltime and 2 parttime. Many others are volunteers from the club such as marshals etc.

Our target for the next period is to introduce policies to make the course more accessible and attractive to non-members while maintaining the use for members.

Employment & Education

Typical staffing levels at this golf facility are:

Full Time Part Time Seasonal
Club Management 1 4
Course Management 2 2
Food & Beverage 3 4 2
Golf Coaching 1 1
Other 2

The sustainability working group at this golf facility is comprised of:

  • General Manager
  • Course Manager
  • Committee Members
  • Technical Specialist
  • Local Community

Employees at this golf facility receive the following formal and informal environmental education:

Activity Description
Storage, application and disposal of pesticides Applying pesticides and chemicals is only done by certified greenkeepers. The catering staff is trained and certified as required in the catering business.
The Captain of Green has formally attended a 1 year course of higher education on Greenkeeping and successfully passed the exam.
Management of accidents and emergencies Much is done to prevent accidents and emergencies, when they do happen, date and time are recorded in a log. An AED (defibrillator) is on site and several marshals and restaurant staff are trained in the use of this.
Management of habitats and vegetation The yearly monitoring report and the wood trimming report is intensively discussed between the committee members , the Captain of Green and the greenkeeper, together with the many contributors. Any comments will be incoprorated in improvement projects.
Waste minimization, separation and recycling All our waste (mostly restaurant and clubhouse) is separated and prepared for recycling.
Organic waste from the course (grascuttings, shredded wood, wood) is mostly removed and disposed via certified contractor.
Health & Safety A minimum of two (contract) greenkeepers are certified. In the clubhouse we have a certified BHV (Bedrijfs Hulp Verlening) team consisting of 7 members who get recertified each year by the local firebrigade. This is a compulsory certificate for each club with more than 150 members.
Energy Saving Lamps have been changed out over the years from standard to energy saving to LED. Light on parking lot is minimised and kept at shallow levels.
Understanding of landscape and cultural heritage Our planted trees have been selected specifically to fit in the landscape of the area.

Community Relations

This golf facility engages with local community groups in the following manner:

Activity Description
Neighbours We invite neighbours once a year for a coffee and then they can discuss any grievances they may have. The last several years this is nearly non existent. Some 15 years ago there was a lot of negative actions by our neighbours, now they are happy.
Local Government The council receives each year an extensive monitoring report and since we have been CtG and GEO certified, there have been no problems anymore. At least once a year they are invited to inspect the golfcourse.
Local Environmental Groups The NMU also receives abovementioned report. And they know this is the result of us working with local workgroups on flora and fauna.
Local Community Groups These groups help us with monitoring the flora and fauna.
Media When there are interesting events at the golfcourse (local) media is informed by the club.
Local Businesses We provide access to our golfcourse to several local business groups. And we aim to give our business as much as feasible to local business. For that we have a proper tenderingprocess in place.
Schools & Colleges During our yearly Open Day we aim to get more youngsters and students attracted to our club. We are now also certified by the NGF as Committed to Youth. An elaborate youth program is in place.

Land Use & Cultural Heritage

This golf facility provides access and diversified land use for others through:

Activity Description
Maintenance of existing public paths A public footpath is laid around part of our course and we mow the grass.
Creation of new paths and nature trails N/A
Installation of effective and welcoming signage Information- and warning signs are placed at the entrance of the terrain.
Providing opportunities for other recreation (e.g. fishing) N/A

No archaeological or heritage surveys have been undertaken at this golf facility.

This golf facility does not consult any organizations regarding the conservation of cultural heritage.

This golf facility undertakes the following activities to conserve cultural heritage features:

Activity Description
Historic Features (Hedgerows / Dykes / Moats / Cairns etc) We maintain the historically important apple orchard.


This golf facility undertakes the following internal environmental communications:

Activity Description
Provision of newsletters, notice boards & poster display The environmental committee publishes regularly via the clubwebsite.
Members evenings and course walks Members evenings and course walks are held, for example the national birdwaching day as wel as during the open days.
Course guides / brochures Sustainable management is promoted in course guides and other publications.
Interpretation panels & course signage Interpretation panels are present.

This golf facility undertakes the following social and environmental advocacy activities:

Activity Description
Website, press releases & brochures There is an separate page on the website that shows information about the comitted to green/GEO certificate, and other related issues.
Course walks / open days Each year there is a open day for everybody interested in the golfcourse or sport.
Joint practical projects with community A covenant with local groups was made about nature and environmental issues during the inception of the club. After 10 years of monitoring this was completed but the club chose to continue with the monitoring programme and joined the CtG and later GEO.