HR: 16:30h
AN: NB24B-05    [Abstracts]
TI: A Simple Flow Time Series Estimation (FTSE) Tool
AU: * Dai, T
EM: Ting.Dai@tetratech-ffx.com
AF: Tetra Tech, Inc., 10306 Eaton Place Suite 340, Fairfax, VA 22030 United States
AU: Paul, S
EM: Sabu.Paul@tetratech-ffx.com
AF: Tetra Tech, Inc., 10306 Eaton Place Suite 340, Fairfax, VA 22030 United States
AU: Bressler, D W
EM: Dave.Bressler@tetratech.com
AF: Tetra Tech, Inc., 400 Red Brook Boulevard Suite 200, Owings Mills, MD 21117 United States
AB: We developed a tool to estimate daily flow time series at ungaged locations based on the neighboring flow gage stations. The tool is composed of two components: (1) an ArcView GIS interface to analyze spatially distributed data, and (2) a Microsoft Excel based flow time series generator. The GIS component processes the spatially distributed input data such as land use, soil, elevation, and weather station locations and determines the hydrologic parameters including drainage area, mean curve number, mean vegetation cover factor, and elevation for both gaged and ungaged locations. The flow time series generator calculates the flow time series at the ungaged locations using a simple hydrologic model that takes consideration of both the landscape information and daily weather information (precipitation and mean temperature). The estimated flows are used to automatically calculate indicators of hydrologic alteration for ecosystems. These indicators provide significant information regarding surface and ground water features that influence aquatic, wetland, and riparian ecosystems. The tool was used to estimate flow time series and, subsequently, the hydrologic alteration indicators at about 1300 locations in the Baltimore-Washington DC region for a comparative biological assessment study.
DE: 1803 Anthropogenic effects
SC: North American Benthological Society [NB]
MN: 2005 Joint Assembly