HYDROGRAPH RESPONSES TO GEOMORPHIC MODEL WATERSHED CHARACTERISTICS AND PRECIPITATION VARIABLES

THE PURPOSE IS TO REPORT THE PRIMARY RESULTS OF THE WATERSHED MODEL STUDIES PROJECT WHICH WAS ESTABLISHED TO DETERMINE THE EFFECT OF WATERSHED SHAPE AND OTHER GEOMORPHIC AND STORM CHARACTERISTICS ON HYDROGRAPH PARAMETERS SO AS TO MORE ACCURATELY ASSESS THE EFFECTS OF SOIL AND VEGETATIVE MANIPULATION ON STREAM FLOW. SINCE MOST OF THE RUNOFF CONTRIBUTING TO THE PEAK FLOW WAS FOUND TO EMANATE FROM THE LOWER HALF OF THE DRAINAGE, A MEASURE OF WATERSHED ECCENTRICITY UTILIZING EASILY MEASURED PROPERTIES IN THAT AREA IS DERIVED AND EVALUATED AS A RELIABLE PREDICTOR OF PEAK MAGNITUDE. WATERSHED SHAPE, SLOPE, SIZE, DRAINAGE PATTERN, AND SOIL DEPTH WERE ISOLATED AND, ALONG WITH RAINFALL INTENSITY, DIRECTION OF STORM MOVEMENT, AND ANTECEDENT MOISTURE CONDITIONS, WERE EVALUATED FOR THE MODELS. STUDIES WERE MADE INTO THE SIMILARITIES BETWEEN THE MODELS AND REAL WORLD WATERSHEDS. AMONG THE SEVERAL CONCLUSIONS ARE (1) THE MODELS EXHIBIT HYDROLOGIC RESPONSES SIMILAR TO THOSE OF A WIDE RANGE OF REAL WATERSHEDS; (2) WATERSHED SHAPE, OF ITSELF, DOES NOT HAVE A TREMENDOUS EFFECT ON PEAK MAGNITUDE; AND (3) WATERSHED ECCENTRICITY IS AN EFFECTIVE, EASILY MEASURED, MEANINGFUL, AND USEFUL EXPRESSION OF WATERSHED SHARE IN SO FAR AS THAT CHARACTERISTIC AFFECTS MAXIMUM PEAK FLOWS AND CERTAIN TIME PARAMETERS OF THE HYDROGRAPH. /AUTHOR/

• Authors:
  • Black, P E
• Publication Date: 1972-12

Media Info

• Features: Figures; References;
• Pagination: p. 309-29
• Serial:
  • Journal Hydrology /Neth/
  • Volume: 17
  • Issue Number: 4

Subject/Index Terms

• TRT Terms: Geomorphology; Hydrographs; Mathematical models; Moisture content; Rainfall; Soils; Watersheds
• Uncontrolled Terms: Models; Rainfall intensity
• Old TRIS Terms: Precipitation
• Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00204496
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 2 1973 12:00AM