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OLS Field Name OLS Field Data
Main Title Conceptual Framework for Assessing Cumulative Impacts on the Hydrology of Nontidal Wetlands.
Author Winter, T. C. ;
CORP Author Geological Survey, Lakewood, CO.;Corvallis Environmental Research Lab., OR.
Publisher c1988
Year Published 1988
Report Number EPA/600/J-88/495;
Stock Number PB90-186214
Additional Subjects Hydrology ; Ground water ; Surface water ; Landforms ; Water flow ; Landscaping ; Geomorphology ; Subsurface drainage ; Water storage ; Soil water ; Ground water recharge ; Discharges ; Surface drainage ; Reprints ; Wetlands ; Environment management ; Ecosystems ; Water runoff
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB90-186214 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/15/1990
Collation 18p
Abstract
Wetlands occur in geologic and hydrologic settings that enhance the accumulation or retention of water. Regional slope, local relief, and permeability of the land surface are major controls on the formation of wetlands by surface-water sources. However, these landscape features also have significant control over groundwater flow systems, which commonly have a role in the formation of wetlands. Because the hydrologic system is a continuum, any modification of one component will have an effect on contiguous components. Disturbances commonly affecting the hydrologic system as it relates to wetlands include weather modification, alteration of plant communities, storage of surface water, road construction, drainage of surface water and soil water, alteration of groundwater recharge and discharge areas, and pumping of groundwater. Assessments of the cumulative effects of one or combinations of these disturbances on the hydrologic system as related to wetlands must take into account the uncertainty in the measurements and in the assumptions that are made in hydrologic studies. As one example, it may be appropriate to assume that regional groundwater flow systems are recharged in uplands and discharged in lowlands. However, a similar assumption commonly does not apply on a local scale, because of the spatial and temporal dynamics of groundwater recharge. Lack of appreciation of such hydrologic factors can lead to misunderstanding of the hydrologic function of wetlands within various parts of the landscape and mismanagement of wetland ecosystems. (Copyright (c) 1988 Springer-Verlag New York Inc.)