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A method for assessing cumulative impacts on wetland functions at the catchment or landscape scale
Expanded Title:VOLUME 5: WRC REPORT TT437/09 A METHOD FOR ASSESSING CUMULATIVE IMPACTS ON WETLAND FUNCTIONS AT THE CATCHMENT OR LANDSCAPE SCALE This volume, part of the series on Wetland Health and Importance, describes methods which enable the assessment of the effects on wetland functionality of the cumulative impacts of human activities at a landscape scale. It uses two metrics - the land cover change impact metric and the loss of function metric to produce a functional effectiveness score that is translated to functional hectare equivalents. The land cover change is based on the recognition that wetland structure and function are fundamentally affected by the hydrological regime. The loss of function metric describes the relationship between the magnitude of impact and wetland functionality for a total of 6 ecosystem services: A) flood attenuation, B) streamflow regulation, C) sediment trapping, D) nitrogen removal, E) phosphate removal or F) toxicant removal. These metrics are based on limited field testing and need verification.
Date Published:01/03/2010
Document Type:Research Report
Document Subjects:Ecosystem - Biodiversity protection, Ecosystem - Invertebrates
Document Keywords:Guidelines, Environment
Document Format:Report
Document File Type:pdf
Research Report Type:Technical
WRC Report No:TT 437/09
ISBN No:9781770059290
ISBN Set No:9781770059369
Authors:Ellery W; Grenfell,S; Grenfell M; Jaganath C; Malan H; Kotze D
Project Leader:Ellery W
Project No:K5/1584
Document Size:4 485 KB
Attachments:EXECUTIVE SUMMARY TT 437.pdf
Related Documents:Wetland valuation Vol I - wetland ecosystem services and their valuation: a review of current understanding and practice
Wetland valuation Vol IV - protocol for the quantification and valuation of wetland ecosystem services
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