{"product_id":"2940148903635","title":"Water Volume and Sediment Volume and Density in Lake Linganore between Boyers Mill Road Bridge and Bens Branch, Frederick County, Maryland (2012)","description":"To assist in understanding sediment loadings and the \u003cbr\u003emanagement of water resources, a bathymetric survey was \u003cbr\u003econducted in the part of Lake Linganore between Boyers Mill \u003cbr\u003eRoad Bridge and Bens Branch in Frederick County, Maryland. \u003cbr\u003eThe bathymetric survey was performed in January 2012 by \u003cbr\u003ethe U.S. Geological Survey, in cooperation with the City of \u003cbr\u003eFrederick and Frederick County. A separate, but related, field \u003cbr\u003eeffort to collect 18 sediment cores was conducted in March \u003cbr\u003eand April 2012. Depth and location data from the bathymetric \u003cbr\u003esurvey and location data for the sediment cores were compiled \u003cbr\u003eand edited by using geographic information system (GIS) \u003cbr\u003esoftware. A three-dimensional triangulated irregular network \u003cbr\u003e(TIN) model of the lake bottom was created to calculate the \u003cbr\u003evolume of stored water in the reservoir. Large-scale topographic maps of the valley prior to inundation in 1972 were \u003cbr\u003eprovided by the Frederick County Division of Utilities and \u003cbr\u003eSolid Waste Management and digitized for comparison with \u003cbr\u003ecurrent (2012) conditions in order to calculate sediment \u003cbr\u003evolume. Cartographic representations of both water depth and \u003cbr\u003esediment accumulation were produced, along with an accuracy assessment for the resulting bathymetric model. Vertical \u003cbr\u003eaccuracies at the 95-percent confidence level for the collected \u003cbr\u003edata, the bathymetric surface model, and the bathymetric \u003cbr\u003econtour map were calculated to be 0.64 feet (ft), 1.77 ft, and \u003cbr\u003e2.30 ft, respectively. A dry bulk sediment density was calculated for each of the 18 sediment cores collected during March \u003cbr\u003eand April 2012, and used to determine accumulated sediment \u003cbr\u003emass.\u003cbr\u003eWater-storage capacity in the study area is 110 acre-feet \u003cbr\u003e(acre-ft) at a full-pool elevation 308 ft above the National \u003cbr\u003eGeodetic Vertical Datum of 1929, whereas total sediment \u003cbr\u003evolume in the study area is 202 acre-ft. These totals indicate a \u003cbr\u003eloss of about 65 percent of the original water-storage capacity \u003cbr\u003ein the 40 years since dam construction. This corresponds to an \u003cbr\u003eaverage rate of sediment accumulation of 5.1 acre-ft per year \u003cbr\u003esince Linganore Creek was impounded.\u003cbr\u003eSediment thicknesses ranged from 0 to 16.7 ft. Sediment \u003cbr\u003edensities ranged from 0.38 to 1.08 grams per cubic centimeter, \u003cbr\u003eand generally decreased in the downstream direction. The total \u003cbr\u003eaccumulated-sediment mass was 156,000 metric tons between \u003cbr\u003e1972 and 2012.","brand":"ReadCycle","offers":[{"title":"Default Title","offer_id":47168991428848,"sku":"2940148903635","price":2.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/2940148903635_p0.jpg?v=1763710174","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/2940148903635","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}