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Accession Number PB2013-106350
Title Estimation of Natural Historical Flows for the Manitowish River near Manitowish Waters, Wisconsin.
Publication Date 2012
Media Count 42p
Personal Author D. M. Robertson P. C. Reneau P. F. Juckem
Abstract The Wisconsin Department of Natural Resources is charged with oversight of dam operations throughout Wisconsin and is considering modifications to the operating orders for the Rest Lake Dam in Vilas County, Wisconsin. State law requires that the operation orders be tied to natural low flows at the dam. Because the presence of the dam confounds measurement of natural flows, the U.S. Geological Survey, in cooperation with the Wisconsin Department of Natural Resources, installed streamflow-gaging stations and developed two statistical methods to improve estimates of natural flows at the Rest Lake Dam. Two independent methods were used to estimate daily natural flow for the Manitowish River approximately 1 mile downstream of the Rest Lake Dam. The first method was an adjusted drainage-area ratio method, which used a regression analysis that related measured water yield (flow divided by watershed area) from short-term (2009 11) gaging stations upstream of the Manitowish Chain of Lakes to the water yield from two nearby long-term gaging stations in order to extend the flow record (19912011). In this approach, the computed flows into the Chain of Lakes at the upstream gaging stations were multiplied by a coefficient to account for the monthly hydrologic contributions (precipitation, evaporation, groundwater, and runoff) associated with the additional watershed area between the upstream gaging stations and the dam at the outlet of the Chain of Lakes (Rest Lake Dam). The second method used to estimate daily natural flow at the Rest Lake Dam was a water-budget approach, which used lake stage and dam outflow data provided by the dam operator. A water-budget model was constructed and then calibrated with an automated parameter-estimation program by matching simulated flow-duration statistics with measured flow-duration statistics at the upstream gaging stations. After calibration of the water-budget model, the model was used to compute natural flow at the dam from 1973 to 2011.
Keywords Dams
Estimates
Gaging stations
Naitowish Waters(Wisconsin)
Natural flows
Streamflow
Watersheds

 
Source Agency US Geological Survey
NTIS Subject Category 50B - Civil Engineering
46B - Fluid Mechanics
Corporate Author Geological Survey, Reston, VA.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1316
Contract Number N/A

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