Hydrologic Routing of Flow in Arid Ephemeral Channels

Hydrographs of ephemeral streams in an arid region usually decrease significantly in magnitude, downstream, unless they are augmented by tributary flows. Estimation of outflow hydrographs from a channel reach is essential for the development of water-resources systems. A hydrologic-flow-routing tech...

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Bibliographic Details
Published inJournal of hydraulic engineering (New York, N.Y.) Vol. 121; no. 6; pp. 466 - 471
Main Authors Sharma, K. D, Murthy, J. S. R
Format Journal Article
LanguageEnglish
Published Reston, VA American Society of Civil Engineers 01.06.1995
Subjects
Earth sciences
Earth, ocean, space
Exact sciences and technology
Hydrology
Hydrology. Hydrogeology
TECHNICAL PAPERS
Asia
India
rainfall
Aravalli Range
hydrology
streams
runoff
arid environment
flow mechanism
storage
equations
water resources
channels
discharge
evaporation
hydrographs
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Summary:Hydrographs of ephemeral streams in an arid region usually decrease significantly in magnitude, downstream, unless they are augmented by tributary flows. Estimation of outflow hydrographs from a channel reach is essential for the development of water-resources systems. A hydrologic-flow-routing technique for arid ephemeral channels is developed. The hydrologic-routing equations for the movement of flood waves are modified by the inclusion of a nonlinear volumetric transmission loss rate term, which is empirically estimated from the observed inflow-outflow data for a channel reach. The predicted outflow hydrographs match better with the observed than the outflow hydrographs generated through the lumped regression model for ephemeral channels. The hydrologic-flow-routing technique may also be used for ungaged channel reaches through parameterization.
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ISSN:0733-9429
1943-7900
DOI:10.1061/(ASCE)0733-9429(1995)121:6(466)