New Paradigm for Sizing Riparian Buffers to Reduce Risks of Polluted Storm Water: Practical Synthesis
Publication: Journal of Irrigation and Drainage Engineering
Volume 135, Issue 2
Abstract
Riparian buffers are commonly promoted to protect stream water quality. A common conceptual assumption is that buffers “intercept” and treat upland runoff. As a shift in paradigm, it is proposed instead that riparian buffers should be recognized as the parts of the landscape that most frequently generate storm runoff. Thus, water quality can be protected from contaminated storm runoff by disassociating riparian buffers from potentially polluting activities. This paper reviews and synthesizes some simple engineering approaches that can be used to delineate riparian buffers for rural watersheds based on risk of generating runoff. Although reference is made to specific future research that may improve the proposed methods for delineating riparian buffers, the approaches described here provide planners and engineers with a set of currently available scientifically defensible tools. It is recommended that planners and engineers use available rainfall and stream discharge data to parameterize the buffer-sizing equations and use variable-width buffers, based on a topographic index, to achieve a realistic representation of runoff generating areas.
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Acknowledgments
The writers would like to explicitly recognize Dr. Tammo Steenhuis and Dr. Michael Walter (Cornell University), Dr. Jane Frankenberger (Purdue University), Drs. Jan Boll and Erin Brooks (University of Idaho), and Dr. Bil Gburek (retired, USDA-ARS/Penn State University) for their early, significant, and direct contributions to this summary work. The writers would also like to thank the three reviewers of this paper for their valuable feedback and suggestions.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 135 • Issue 2 • April 2009
Pages: 200 - 209
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© 2009 ASCE.
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Received: Mar 19, 2008
Accepted: Aug 4, 2008
Published online: Apr 1, 2009
Published in print: Apr 2009
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