Development of a Mathematical Model of Infiltration Which Includes the Effects of Raindrop Impact (Project Completion Report)

Persistent Link:
http://hdl.handle.net/10150/314467
Title:
Development of a Mathematical Model of Infiltration Which Includes the Effects of Raindrop Impact (Project Completion Report)
Author:
Cluff, C. B.; Evans, D. D.; Morse, J. G.
Publisher:
University of Arizona (Tucson, AZ)
Issue Date:
1973
Description:
Project Completion Report / OWRT Project No. A-027-ARIZ / Development of a mathematical model of infiltration which includes the effects of raindrop impact / Agreement No. 14-31-0001-3503 / Project Dates: July 1971-December 1972.
URI:
http://hdl.handle.net/10150/314467
Abstract:
The purpose of this investigation was to use an existing mathematical model of infiltration to assist in determining which factors, including raindrop impaction, were responsible for infiltration characteristics of a bare semiarid watershed. The infiltration model developed by Roger Smith was selected as best suited for this investigation. Several laboratory and field rainfall simulator runs were modeled. Good correlation was found between the modeled and experimental results for both the infiltration data and the saturation profiles, for both bare and grass covered plots. For the lab and field experiments a realistic rotating disk rainfall simulator was used. In the field tests bare and grass covered plots were tested. In the lab specially constructed soil boxes were used that permitted measurement of infiltration and saturation profiles with time. Gross changes in saturated hydraulic conductivities due to crusting effects were also measured. Gamma ray attenuation techniques were used to obtain density and soil moisture profiles for the laboratory experiments. It was found that the Smith model can be used to simulate infiltration from different surface conditions as long as there is some method to calibrate the model. Carefully obtained saturated and unsaturated hydraulic properties for the soil types present in the watershed are needed in addition to infiltration data from a realistic rainfall simulator or through hydrograph analysis from unit subwatersheds.
Language:
en_US
Keywords:
Runoff -- Mathematical models.; Rain and rainfall -- Mathematical models.

Full metadata record

DC FieldValue Language
dc.contributor.authorCluff, C. B.en_US
dc.contributor.authorEvans, D. D.en_US
dc.contributor.authorMorse, J. G.en_US
dc.date.accessioned2014-03-21T23:35:02Z-
dc.date.available2014-03-21T23:35:02Z-
dc.date.issued1973-
dc.identifier.urihttp://hdl.handle.net/10150/314467-
dc.descriptionProject Completion Report / OWRT Project No. A-027-ARIZ / Development of a mathematical model of infiltration which includes the effects of raindrop impact / Agreement No. 14-31-0001-3503 / Project Dates: July 1971-December 1972.en_US
dc.description.abstractThe purpose of this investigation was to use an existing mathematical model of infiltration to assist in determining which factors, including raindrop impaction, were responsible for infiltration characteristics of a bare semiarid watershed. The infiltration model developed by Roger Smith was selected as best suited for this investigation. Several laboratory and field rainfall simulator runs were modeled. Good correlation was found between the modeled and experimental results for both the infiltration data and the saturation profiles, for both bare and grass covered plots. For the lab and field experiments a realistic rotating disk rainfall simulator was used. In the field tests bare and grass covered plots were tested. In the lab specially constructed soil boxes were used that permitted measurement of infiltration and saturation profiles with time. Gross changes in saturated hydraulic conductivities due to crusting effects were also measured. Gamma ray attenuation techniques were used to obtain density and soil moisture profiles for the laboratory experiments. It was found that the Smith model can be used to simulate infiltration from different surface conditions as long as there is some method to calibrate the model. Carefully obtained saturated and unsaturated hydraulic properties for the soil types present in the watershed are needed in addition to infiltration data from a realistic rainfall simulator or through hydrograph analysis from unit subwatersheds.en_US
dc.language.isoen_USen
dc.publisherUniversity of Arizona (Tucson, AZ)en_US
dc.sourceWater Resources Research Center. The University of Arizona.en_US
dc.subjectRunoff -- Mathematical models.en_US
dc.subjectRain and rainfall -- Mathematical models.en_US
dc.titleDevelopment of a Mathematical Model of Infiltration Which Includes the Effects of Raindrop Impact (Project Completion Report)en_US
dc.identifier.oclc15086411-
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
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