Persistent Link:
http://hdl.handle.net/10150/301034
Title:
Effects of Rainfall Intensity on Runoff Curve Numbers
Author:
Hawkins, R. H.
Affiliation:
Watershed Science Unit, Department of Forestry and Outdoor Recreation, Utah State University, Logan, Utah, 84322
Issue Date:
15-Apr-1978
Rights:
Copyright ©, where appropriate, is held by the author.
Collection Information:
This article is part of the Hydrology and Water Resources in Arizona and the Southwest collections. Digital access to this material is made possible by the Arizona-Nevada Academy of Science and the University of Arizona Libraries. For more information about items in this collection, contact anashydrology@gmail.com.
Publisher:
Arizona-Nevada Academy of Science
Journal:
Hydrology and Water Resources in Arizona and the Southwest
Abstract:
The runoff curve number rainfall- runoff relationships may be defined in two ways: (1) by formula, which uses total storm rainfall and a curve number, but not intensity or duration descriptors; and (2) rainfall loss accounting using a 4, rate and a specific intensity duration distribution of the function i(t) = 1.5P(5(1 +24t /T)-(1/2)-1) /T, where i(t) is the intensity at time t for a storm of duration T. Thus, the curve number method is found to be a special case of φ index loss accounting. The two methods are reconciled through the identity 1.2S = φT, leading to the relationship CN - 1200/(12 +φT). The effects of rainfall intensity on curve number are felt through deviations from the necessary causative intensity - duration curve. Some sample alternate distributions are explored and the effects on curve number shown. Limitations are discussed.
Keywords:
Hydrology -- Arizona.; Water resources development -- Arizona.; Hydrology -- Southwestern states.; Water resources development -- Southwestern states.; Rainfall-runoff relationships; Storm runoff; Runoff coefficient; Curves; Rainfall intensity; Infiltration; Forecasting; Hydrologic equation; Measurement; Design criteria
ISSN:
0272-6106

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleEffects of Rainfall Intensity on Runoff Curve Numbersen_US
dc.contributor.authorHawkins, R. H.en_US
dc.contributor.departmentWatershed Science Unit, Department of Forestry and Outdoor Recreation, Utah State University, Logan, Utah, 84322en_US
dc.date.issued1978-04-15-
dc.rightsCopyright ©, where appropriate, is held by the author.en_US
dc.description.collectioninformationThis article is part of the Hydrology and Water Resources in Arizona and the Southwest collections. Digital access to this material is made possible by the Arizona-Nevada Academy of Science and the University of Arizona Libraries. For more information about items in this collection, contact anashydrology@gmail.com.en_US
dc.publisherArizona-Nevada Academy of Scienceen_US
dc.identifier.journalHydrology and Water Resources in Arizona and the Southwesten_US
dc.description.abstractThe runoff curve number rainfall- runoff relationships may be defined in two ways: (1) by formula, which uses total storm rainfall and a curve number, but not intensity or duration descriptors; and (2) rainfall loss accounting using a 4, rate and a specific intensity duration distribution of the function i(t) = 1.5P(5(1 +24t /T)-(1/2)-1) /T, where i(t) is the intensity at time t for a storm of duration T. Thus, the curve number method is found to be a special case of φ index loss accounting. The two methods are reconciled through the identity 1.2S = φT, leading to the relationship CN - 1200/(12 +φT). The effects of rainfall intensity on curve number are felt through deviations from the necessary causative intensity - duration curve. Some sample alternate distributions are explored and the effects on curve number shown. Limitations are discussed.en_US
dc.subjectHydrology -- Arizona.en_US
dc.subjectWater resources development -- Arizona.en_US
dc.subjectHydrology -- Southwestern states.en_US
dc.subjectWater resources development -- Southwestern states.en_US
dc.subjectRainfall-runoff relationshipsen_US
dc.subjectStorm runoffen_US
dc.subjectRunoff coefficienten_US
dc.subjectCurvesen_US
dc.subjectRainfall intensityen_US
dc.subjectInfiltrationen_US
dc.subjectForecastingen_US
dc.subjectHydrologic equationen_US
dc.subjectMeasurementen_US
dc.subjectDesign criteriaen_US
dc.identifier.issn0272-6106-
dc.identifier.urihttp://hdl.handle.net/10150/301034-
dc.identifier.journalHydrology and Water Resources in Arizona and the Southwesten_US
dc.typetexten_US
dc.typeProceedingsen_US
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