Accession Number:

ADA129681

Title:

Computer-Aided Watershed Analysis.

Descriptive Note:

Final rept. 1976-1982,

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB

Personal Author(s):

Report Date:

1982-09-01

Pagination or Media Count:

167.0

Abstract:

A system was developed to simulate the overland flow of rainfall runoff in a microgeometric model of the landscape. The landscape model was developed from normally available materials by means of a geographic data-handling system. The water flow model provides both direct rainfall and grid-to-grid flo components for every grid on the landscape. The size of the grid, the time increment for analysis, and the rainfall intensity are adjustable by the user. The surface flow is followed in an eight-nearest-neighbor microflow pattern across the landspace until the flow reaches channels within the grids. The system provides flow patterns within the watershed, effective drainage area and runoff curve numbers for every grid, and a complete flow time history for each grid. The system was developed according to an objective mathematical approaches so that it does not require extensive technical knowledge for operation it was designed to use normally available data at reduced computer operation cost . This previously unavailable technical procedure is expected to be useful in erosion studies and as an aid in U.S. Army Corps of Engineers construction activities. Military applications include an ability to rapidly assess, for anticipated rainfall conditions, areas with potential cross-country mobility problems induced by storm runoff.

Subject Categories:

  • Hydrology, Limnology and Potamology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE