Analytic Method to Derive Wetland Stage-Storage Relationships Using GIS Areas
Publication: Journal of Hydrologic Engineering
Volume 13, Issue 4
Abstract
The relationship between the depression area , volume , and depth of water for wetlands, ponds, and lakes is often required for model studies. Area-depth and volume-depth relationships for wetlands, ponds, and lakes, which are important inputs to hydrologic models can be developed from detailed surveys and/or bathymetric maps that are costly and labor intensive to produce, or the use of simple geometric models. An analytical approach is introduced to describe wetland stage-storage relationships using a single shape parameter, simple geometric data available from geographic information system coverages or field studies, and a power-function model. The dimensionless shape parameter defines the wetland prismatic conic shape, and together with the reference wetland pool area and associated maximum pool depth defines the relationship to a high degree of accuracy. Shape parameters were developed for 42 wetlands to generate relationships for each wetland. The study findings were: (1) there is little variability in the dimensionless shape parameter; (2) the mathematical model accurately represents the relations for all wetlands analyzed; and (3) only the upper 80% of the wetland storage is needed to develop accurate stage-storage predictions using this approach. The developed wetland storage equations should prove useful in field studies, theoretical investigations, and surface/groundwater modeling.
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Acknowledgments
The writers graciously acknowledge the contributions of Dr. Terrie M. Lee, United States Geological Survey, Water Resources Division, Mr. Doug Leeper, Senior Environmental Scientist, Resource Conservation and Development Department, Southwest Florida Water Management District, and Dr. Jeff Geurink, Water Resource Engineer, Tampa Bay Water, for their valuable contributions throughout the development of this paper.
References
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© 2008 ASCE.
History
Received: Feb 12, 2007
Accepted: Aug 2, 2007
Published online: Apr 1, 2008
Published in print: Apr 2008
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