ANALYTICAL SOLUTION FOR CHANNEL ROUTING WITH UNIFORM LATERAL INFLOW
Distributed hydrologic models describe both hillslope and channel processes. The presence of a large number of hillslopes requires that flood routing through a channel network be computationally efficient and able to account for hillslope or lateral inflow. This paper presents an analytical solution to the linearized Saint-Venant equation with lateral inflow uniformly distributed along the channel. The solution is given as the sum of two functions. The first function, obtained by several earlier authors, represents the response to the upstream inflow; the second function, derived in this study, represents the contribution from lateral or hillslope inflow. The authors test the latter on a simple channel, and the results compare well with those of a detailed numerical model for channels with steep to fairly gentle bed slopes. The errors caused by linearization are presented, and the effects of channel-bed slope and the reference velocity are discussed. A run time comparison between the numerical and the analytical solutions shows that the latter is more efficient computationally and hence is ideal as an element of a distributed rainfall-runoff model.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/8672558
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Corporate Authors:
American Society of Civil Engineers
1801 Alexander Bell Drive
Reston, VA United States 20191-4400 -
Authors:
- Moramarco, T
- Fan, Yingling
- Bras, R L
- Publication Date: 1999-7
Language
- English
Media Info
- Features: Appendices; Figures; References; Tables;
- Pagination: p. 707-713
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Serial:
- Journal of Hydraulic Engineering
- Volume: 125
- Issue Number: 7
- Publisher: American Society of Civil Engineers
- ISSN: 0733-9429
- Serial URL: https://ascelibrary.org/journal/jhend8
Subject/Index Terms
- TRT Terms: Channel flow; Channels (Waterways); Flood routing; Hills; Hydrology; Mathematical models; Rainfall; Routing; Runoff; Slopes
- Subject Areas: Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;
Filing Info
- Accession Number: 00766175
- Record Type: Publication
- Contract Numbers: 49776283
- Files: TRIS
- Created Date: Jul 12 1999 12:00AM