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Using a GIS to link digital spatial data and the precipitation-runoff modeling system, Gunnison River Basin, Colorado

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Abstract

The U.S. Geological Survey Precipitation-Runoff Modeling System, a modular, distributed-parameter, watershed-modeling system, is being applied to 20 smaller watersheds within the Gunnison River basin. The model is used to derive a daily water balance for subareas in a watershed, ultimately producing simulated streamflows that can be input into routing and accounting models used to assess downstream water availability under current conditions, and to assess the sensitivity of water resources in the basin to alterations in climate. A geographic information system (GIS) is used to automate a method for extracting physically based hydrologic response unit (HRU) distributed parameter values from digital data sources, and for the placement of those estimates into GIS spatial datalayers. The HRU parameters extracted are: area, mean elevation, average land-surface slope, predominant aspect, predominant land-cover type, predominant soil type, average total soil water-holding capacity, and average water-holding capacity of the root zone.

Publication type Conference Paper
Publication Subtype Conference Paper
Title Using a GIS to link digital spatial data and the precipitation-runoff modeling system, Gunnison River Basin, Colorado
Volume 2
Year Published 1993
Language English
Larger Work Type Conference Paper
Larger Work Subtype Conference Paper
Larger Work Title Proceedings of the Second international conference/workshop on Integrating geographic information systems and environmental modeling
Conference Title Second international conference/workshop on Integrating geographic information systems and environmental modeling
Conference Date 1993
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