Please use this identifier to cite or link to this item:
Title: Readily available hydrologic models : pertinence to regulatory application
Authors: Pruitt, Bruce A.
Keywords: Wetlands
Hydrologic models
Environmental management
Publisher: Environmental Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical Note (Wetlands Regulatory Assistance Program (U.S.)) ; no. ERDC/TN WRAP-20-1
Abstract: Water is the driving force of wetlands. Hydroperiod represents both the frequency and duration of inundation or soil saturation whether it is from flooding or ponding. The formation of hydric soils and an expression of hydrophytic vegetation are evidence of the hydroperiod, which can be described along a gradient of hydrologic conditions (Figure 1). Hydrologic modeling provides a means to establish wetland hydroperiod, including current wetland hydrologic conditions and forecasting future conditions in response to future with and without wetland impacts or restoration actions. Today, fast computer processing and hydrologic models allow the user to make a large number of computations very rapidly on potentially large volumes of data. Currently, there is a myriad of hydrologic models available that offer an array of applications. For regulatory application, accurate determination of wetland hydrology is paramount to the following: - Confirm wetland hydrologic criteria in accordance to the US Army Corps of Engineers Wetland Delineation Manual (1987 Manual) and Regional Supplements. - Establish frequency and duration (hydroperiod) of wetland ponding and flooding. - Conduct wetland functional assessments including identification of predominant water source(s). - Estimate wetland impacts from regulated activities. - Determine ecological lift in response to restoration actions (compensatory mitigation). - Establish performance standards and success criteria for compensatory mitigation. - Facilitate development of a monitoring and adaptive management plan. The objective of this report is to provide a treatise of hydrologic models that offer specific application to establish wetland hydrology for existing and future conditions in response to regulated activities and restoration actions. The emphasis is on the suitability of existing hydrologic models to hydrogeomorphic (HGM) wetland classes. HGM subclasses are not addressed in this technical note. For more details on HGM classification, see Brinson (1993).
Description: Technical Note
Gov't Doc #: ERDC/TN WRAP-20-1
Rights: Approved for Public Release; Distribution is Unlimited
Size: 12 pages / 2.28 MB
Types of Materials: PDF
Appears in Collections:Technical Note

Files in This Item:
File Description SizeFormat 
ERDC-TN WRAP-20-1.pdf2.28 MBAdobe PDFThumbnail