Runoff Calculation on Semiarid Watersheds Using Infiltration Curves Determined from the Rotadisk Rainulator

Persistent Link:
http://hdl.handle.net/10150/314257
Title:
Runoff Calculation on Semiarid Watersheds Using Infiltration Curves Determined from the Rotadisk Rainulator
Author:
Morin, Joseph; Cluff, C. Brent
Affiliation:
Soil Conservation of Israel; Water Resources Research Center
Publisher:
Water Resources Research Center, University of Arizona (Tucson, AZ)
Issue Date:
Jun-1979
URI:
http://hdl.handle.net/10150/314257
Abstract:
A method of determining runoff from ungaged semi-arid unit watersheds is presented. The method consists of using the realistic rotating disk rainfall simulator ( Rotadisk Rainulator) to measure the infiltration rate combined with data from recording raingages. The infiltration rate is expressed mathematically as a function of rainfall volume by using a non-linear correlation fit method. A runoff hydrograph for the unit watershed is then calculated using a computer program which essentially subtracts the infiltration from the rainfall volume as measured by existing recording rainfall records. This hydrograph determination is repeated for increasing increments of surface storage and detention. The final selection of storage and detention is based in part on direct measurement using the Rotadisk Rainulator, and using the resulting hydrographs combined with past experience of the hydrologist with gaged watersheds. The method was tested using four one-acre gaged watersheds on the Atterbury Experimental Watershed on the valley floor east of Tucson, Arizona. In general, the correlation between measured and calculated runoff was better than 0.9 over a three-year period for the four unit-watersheds tested.
Language:
en_US

Full metadata record

DC FieldValue Language
dc.contributor.authorMorin, Josephen_US
dc.contributor.authorCluff, C. Brenten_US
dc.date.accessioned2014-03-19T20:40:18Z-
dc.date.available2014-03-19T20:40:18Z-
dc.date.issued1979-06-
dc.identifier.urihttp://hdl.handle.net/10150/314257-
dc.description.abstractA method of determining runoff from ungaged semi-arid unit watersheds is presented. The method consists of using the realistic rotating disk rainfall simulator ( Rotadisk Rainulator) to measure the infiltration rate combined with data from recording raingages. The infiltration rate is expressed mathematically as a function of rainfall volume by using a non-linear correlation fit method. A runoff hydrograph for the unit watershed is then calculated using a computer program which essentially subtracts the infiltration from the rainfall volume as measured by existing recording rainfall records. This hydrograph determination is repeated for increasing increments of surface storage and detention. The final selection of storage and detention is based in part on direct measurement using the Rotadisk Rainulator, and using the resulting hydrographs combined with past experience of the hydrologist with gaged watersheds. The method was tested using four one-acre gaged watersheds on the Atterbury Experimental Watershed on the valley floor east of Tucson, Arizona. In general, the correlation between measured and calculated runoff was better than 0.9 over a three-year period for the four unit-watersheds tested.en_US
dc.language.isoen_USen
dc.publisherWater Resources Research Center, University of Arizona (Tucson, AZ)en_US
dc.sourceWater Resources Research Center. The University of Arizona.en_US
dc.titleRunoff Calculation on Semiarid Watersheds Using Infiltration Curves Determined from the Rotadisk Rainulatoren_US
dc.contributor.departmentSoil Conservation of Israelen_US
dc.contributor.departmentWater Resources Research Centeren_US
dc.description.collectioninformationThis item is part of the Water Resources Research Center collection. It was digitized from a physical copy provided by the Water Resources Research Center at The University of Arizona. For more information about items in this collection, please contact the Center, (520) 621-9591 or see http://wrrc.arizona.edu.en_US
All Items in UA Campus Repository are protected by copyright, with all rights reserved, unless otherwise indicated.