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WSP05388
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Last modified
1/26/2010 2:18:09 PM
Creation date
10/12/2006 12:59:32 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8449
Description
Platte River Projects
State
CO
Basin
South Platte
Date
9/9/1980
Author
USGS
Title
Hydrologic Analysis of the Proposed Badger-Beaver Creeks Artificial-Recharge Project, Morgan County, Colorado
Water Supply Pro - Doc Type
Publication
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<br />,., <br />',' <br /> <br />1, <br /> <br />I, <br /> <br />r <br /> <br />I A digital computer model was developed for this study to simulate the <br />:routing of the diversions from the river throughout the canal and pond sys- <br />, <br />:tem, and to compute the seepage losses. There are four basic components to <br />toe model: (1) Routing the flow along the channels; (2) proportioning the, <br />f.l.ow at the diversion points; (3) simulating the pond conditions; and (4): <br />~omputing the seepage. The time interval used in the model is 1 month. That <br />:is the time interval of the diversion data and also seems to be the shortest <br />~onvenient time interval for all the water to move through the entire canal <br />,system at low flow. <br /> <br />Distribution Model <br /> <br />, The canal system is described by reaches which connect node points. The <br />nodes are identified by their latitude, longitude, and altitude of land <br />~urface. These data were digitized from maps of the preliminary canal layout. <br />provided by Thomas Norton (Norton, Underwood, and lamb Engineering Consult- <br />'ants, ",ritten commun., 1978) (fig. 2). The model use's 982 nodes to describe <br />,the 225-mi net"lOrk (fig. 7). <br />I <br />I Flow routing is a simple conservation of mass with the only cause of de-, <br />'pletion in a reach being seepage, <br /> <br />Q =Q -8 <br />out in ' <br /> <br />(1) , <br /> <br />it/here Q <br />out <br />Q. <br />In <br />8 <br /> <br />is the discharge leaving the reach, in cubic feet per second; <br /> <br /> <br />is the discharge entering the reach, in cubic feet per second; and <br /> <br /> <br />is the seepage lost within the reach, in cubic feet per second. <br /> <br />i <br />Possible losses due to evaporation or transpiration are considered small and' <br />were ignored. An important feature of the routing component of the model was, <br />:the computation of depth of the water in canals. The depth is needed fori <br />:computing time of travel and seepage. The depth is computed by two differenti <br />,techniques, depending on which part of the canal system is being analyzed. I <br />'In the existing part of the canal, there are so many check gates and dams for' <br />:the purpose of diverting water to farm laterals th3t the only useful tech-! <br />'nique was a stage-discharge relationship. Based on discharge measurements' <br />'made by D. R. Minges (U.S. Geological Survey, written commun., 1978) on the; <br />,Fort 110rgan Canal and Lower Platte and Beaver Canal, the general logarithmic! <br />,function computed is: i <br />, I <br />, <br /> <br />h=O.106QO.640, <br /> <br />where his <br />I <br /> <br />depth of the water in the canal, in feet; <br />Q is the discharge in the canal, in cubic feet <br /> <br />and <br /> <br />(2) i <br />I <br />I <br />J <br /> <br />per second. <br /> <br />1.1 <br /> <br />I <br />I <br />! <br />I- <br />I <br />
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