Buffer Zone Management for Golf Courses
BUFFER STRIP BASICS
Golf course design concepts have changed dramatically over the years. Modern design
practices encourage designers and architects to incorporate the natural features of the
landscape into the overall design of a golf course. This helps to create a more natural
appearance and also to protect the surrounding environment from degradation. The use
of buffer zones and landscaping with native vegetation is often standard practice on new
course designs and is being incorporated into existing courses.
Michigan golf course landscapes commonly feature water as an integral part of the design
and challenge of the course. Water features range from the majestic Great Lakes to inland
lakes, ponds, streams and wetlands. Golf course superintendents recognize their role as
stewards of the environment and strive to incorporate best management practices in their
day- to- day operations. Integrating buffer zones on existing courses can be challenging
because space adjacent to waterways may be limited due to the layout of the golf holes.
This series of fact sheets will focus upon techniques to incorporate buffer zones on
existing golf courses. These techniques may also be applied to newly constructed golf
courses if they were not included in the original design. Many good references exist for
those planning new golf courses. The “Landscape Restoration Handbook,” published by
Lewis Publishers and copyrighted by the United States Golf Association, is a particularly
helpful reference for those in the planning stages of a new golf course. When
interviewing potential design firms, it is important to determine if they have staff trained
in evaluating natural resources and methods to reduce impacts to high quality resources
on the site or the surrounding area.
Definition of Buffers
The Michigan Department of Environmental Quality defines a buffer as a vegetated area
adjacent to a waterbody (i.e. river, stream, wetland, lake) that may consist of natural
undeveloped land where the existing vegetation is left intact or it may be land planted
with vegetation designed to maximize protection. Buffers are often designed to intercept
surface runoff and subsurface flow from upland sources in order to filter pollutants before
they enter surface waters and groundwater recharge areas.
For use on golf courses, we will define buffers as any vegetated areas, natural or planted,
that are designed to minimize the effects of human activities on the environment and
maximize the protection of natural resources. These areas may be directly adjacent to
waterbodies or positioned anywhere within the golf course property where they are
deemed to be beneficial for protecting human, plant, animal, air or soil resources. Areas
directly adjacent to waterbodies will be referred to as riparian buffers in these fact sheets.
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Benefits of Buffers
Buffer strips can perform many valuable functions including the following:
v Trap and filter sediment
v Trap and filter nutrients, pesticides and animal waste
v Stabilize eroding banks
v Provide shade to cool the water
v Provide wildlife habitat
v Enhance aquatic habitat
v Can be designed to deter nuisance species like geese
v Reduce or eliminate time- consuming string trimming or walk mowing
v Provide large woody debris for aquatic habitat
v Food source for aquatic habitat
Riparian forests and grass communities have been shown to substantially reduce the
amount of nitrogen reaching surface waters. Microbes in organic forest soils and
wetlands convert nitrate into nitrogen gas through denitrification. Tree and plant roots
help stabilize streambanks and provide protection from erosion.
Shade from riparian forest buffers keep water temperatures cooler and reduce
temperature fluctuations. This can be especially important in cold- water trout streams.
Streamside forests are also important in the food chain of aquatic systems. Organic
compounds such as leaves, fruit, limbs, and insects fall into the stream and decay. These
compounds are fed upon by stream bacteria, fungi and invertebrates and provide the
foundation of the aquatic food chain. Fallen trees and branches also create favorable
habitat areas for fish.
Buffers are also important areas for wildlife and can be designed to attract a variety of
wildlife including songbirds, butterflies, and small mammals. Properly designed, they can
add interesting and aesthetic viewing opportunities for golf course patrons. The linear
nature of many riparian buffers not only provides food and cover for animals, but they
also serve as travel corridors between habitat areas. This connection is important in
maintaining biological diversity and prevents the fragmentation of habitat. Alternately,
buffers can be designed to discourage unwanted species such as geese. When buffers are
located directly adjacent to waterbodies, geese are often reluctant to venture through tall
vegetation when exiting the water for fear of predators on the other side.
Golf Course Inputs
The primary pollutants of concern on golf courses are nutrients (nitrogen and
phosphorus), pesticides, and sediment that could potentially migrate into nearby water.
Research conducted to investigate the movement of nutrients and pesticides from golf
courses reveals that wise management practices can minimize the potential for these
products to contaminate water supplies. Some studies suggest turfgrass areas generally
rank second only to undisturbed forests in their ability to prevent pesticides and nutrients
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from reaching groundwater and surface water. The utilization of buffer strips is an added
practice to help safeguard waterbodies from nutrients or pesticides that are not utilized by
turfgrass.
Buffer Zone Concepts
Much of the information available on the design of buffer zones is based upon a “Threezone
Buffer Concept” recommended by agencies such as the Natural Resources
Conservation Service (NRCS) and the USDA Forest Service. This concept divides the
areas directly adjacent to a stream into zones, beginning at the water’s edge and moving
outward. These agencies recommend that Zone 1 (next to the water’s edge) should
remain an area of undisturbed mature trees. Zone 2 consists of an area of managed forest
where plant material may be periodically harvested. Zone 3 is an area of dense grasses
and/or forbs (such as wildflowers or broad- leaved herbaceous plants). This zone is
periodically mowed or harvested in order to remove nutrients stored in plant materials.
Phosphorus becomes physically bound up in plant materials. If it is not removed, the
vegetation can reach a saturation point where it is no longer effective in removing
nutrients.
Many government agencies use fixed buffer widths in their standards while others
recommend a range of widths in order to perform a specific function. For example, the
NRCS specifies the following buffer zone widths for various conditions:
A. Establishment of riparian forest buffers to reduce pollution by sediment,
nutrients, pesticides, or other pollutants and restore overall water quality. The
total combined width of all three zones will be not less than 55 feet.
B. Establishment of riparian forest buffers to provide wildlife habitat, maintain or
restore water temperature, and provide large woody debris. The total
combined width of the first two zones will not be less than 100 feet.
C. Establishment of riparian forest buffers in areas with existing woody plants
that need enhancement and are less than 100 feet wide. The total combined
width of the first two zones will not be less than 100 feet.
D. Establishment of riparian forest buffers in areas with existing woody plants
that exceed 100 feet in width. The total combined width of the first two zones
will not be less than 100 feet .
Please refer to the NRCS web site for more information on these specifications:
http://w ww.mi.nrcs.usda.gov/Technical_References_and_Data/Michigan_Tech_Guide/Ri
parianForestBuffer391.pdf
The width of buffer zones can vary depending upon space. Studies have shown that a
range of buffer widths from 3m to 200m have been effective, depending upon site
specific conditions. In most cases, a buffer of at least 100 feet is necessary to fully
protect aquatic resources. Studies have shown that negative impacts to aquatic
invertebrates occur on streams with buffer zones less than 100 feet. If 100 feet is not
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available, smaller buffers still afford some level of protection to the water body and are
preferable to no buffer at all.
Using Buffers On Golf Courses
In developing criteria for buffer zones on golf courses, it is necessary to distinguish
between in- play and out-of- play areas. For existing golf courses, the use of standard fixed
width buffer zones is not practical. Space limitations require more flexibility. Based upon
a review of current buffer design concepts, scientific literature and collaboration with
governmental agencies in Michigan, a flexible zone system for both in- play and out- ofplay
areas has been developed for use on golf courses. The specific dimensions of the
buffer are adjusted based on the site conditions and available space. The in- play buffer
zone system incorporates a series of gradually increasing mowing heights adjacent to the
water. Research has shown that even buffer zones of 3-inch tall grass will provide some
level of protection for streams, lakes, and ponds from pesticides and nutrient pollution
when grown between shorter, high maintenance turf and water bodies. The soils, slope,
play of the golf hole and available space will determine the size of each buffer zone.
Buffer widths should be maximized to the extent possible to provide the most protection
of aquatic resources.
The criteria for in- play areas differs from the traditional three- zone approach in the
following manner:
v A management plan for inputs will be implemented for each in- play buffer
zone area
v A series of increased mowing heights of turf grass are incorporated into the
in-play zones
v The in- play areas require turf grass to be less than 8 inches tall to allow play
v Not all zones must be used in each situation depending upon space limitations
The criteria for the out-of- play areas are similar to the traditional three- zone concept.
However, they have been revised to allow more flexibility in areas where either space or
other considerations require a different treatment.
Public Education
Public education is an important element in the successful implementation of any buffer
zone strategy on golf courses. Some golf course managers have been forced to remove
buffer plantings because of member complaints. Many golfers have become accustomed
to the manicured look common on older golf courses. They may view the introduction of
buffer plantings as unattractive weeds that eat golf balls. Therefore, it is recommended
that golf course managers and superintendents educate their clientele before, during and
after the implementation of buffer plantings. Newsletters, fact sheets, membership
meetings, and interpretive signing along the golf course are all mechanisms for informing
the public about the merits of buffers.
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Authors
Gregory T. Lyman, Department of Crop and Soil Sciences, 584 Plant and Soil Sciences Building,
East Lansing, MI 48824-1325. Phone (517) 353-0860; fax (517) 355-0270; e-mail
lyman@msu.edu .
Erica Staton, Stu Kogge, and Tom Bennett. The Institute for Wetland and Coastal Trainings and
Research, 4245 Beeman Road, Williamston, Michigan 48895. Phone (517) 655-9754; e-mail:
tombennett@wetlandcoastal.com
Acknowledgements
These fact sheets were made possible through a grant received from the Office of the Great
Lakes, Michigan Department of Environmental Quality.
Thanks is also extended to the following organizations who participated in the steering committee
involved in developing criteria for implementing buffer strips on Michigan golf course properties:
• Michigan State University – Department of Crop and Soil Sciences; Department of Fisheries
and Wildlife
• Michigan Department of Environmental Quality – Surface Water Quality Division; Land and
Water Management Division
• Michigan Department of Natural Resources – Wildlife Division; Fisheries Division
• U.S. Natural Resources Conservation Service
• U.S. Fish and Wildlife Service
• Michigan Turfgrass Foundation
• Golf Course Owners Association
• Golf Course Architects Association