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|Title:||Selective withdrawal from Beech Fork Lake, Beech Fork River, West Virginia : hydraulic model investigation|
|Authors:||United States. Army. Corps of Engineers. Huntington District.|
Gloriod, Terrence L.
Bohan, Joseph P.
|Keywords:||Beech Fork Lake|
Beech Fork River
|Publisher:||Hydraulics Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Technical report (U.S. Army Engineer Waterways Experiment Station) ; H-73-14.|
Abstract: Tests were conducted at the U. S. Army Engineer Waterways Experiment station (WES) on a 1:36-scale model of a portion of the proposed Beech Fork Lake and multilevel intake structure to determine the effects of the upstream topography and the geometry in the vicinity of the intake structure on the selective withdrawal capability of the structure. A 2500-ft-long by 1800-ft-wide area of the 40-ft-deep lake was modeled, and three alternative locations of the intake structure were investigated. Density stratification caused by differentials in temperature in the prototype was simulated in the model by using saline and fresh waters. The majority of the tests were conducted with outflow only. The outflow-to storage-volume ratio was very small for the duration of a given test; therefore, no appreciable drop in the pool elevation was observed. Temperature and conductivity profiles were measured in the model, and their effects were combined to determine the density profiles. Dye particles were dropped into the approach channel flow to indicate the upper and lower withdrawal-zone limits. Density profiles, appropriate discharges, and other required data were used as input to a computer program (based on the selective withdrawal techniques developed in previous WES investigations) to predict the withdrawal-zone limits. A comparison of the observed and predicted limits indicated good agreement for the three alternative locations of the intake structure. Therefore, based on selective withdrawal performance, there appeared to be no distinct difference in the three locations tested. One test was conducted with a dyed, dense inflow introduced into the model. An equal rate of withdrawal was released through the lowest level intake to determine the path of the inflow through the lake. The flow followed the sinuous river channel from the point of entry to the intake structure. The dyed inflow then remained in the river channel until there was enough buildup for it to enter the approach channel. Thus, the general pattern of density currents in the proposed reservoir and the sel ective withdrawal characteristics of the proposed outlet works for both single- and multiple-outlet operations were verified to be representative of those anticipated; i. e., they were not affected by either the topography of the reservoir and approach channel or the geometry in the immediate vicinity of the intake structure.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Technical Report|
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