Bathymetric contour maps, surface area and capacity tables, and bathymetric change maps for selected water-supply lakes in north-central and west-central Missouri, 2020

First posted May 31, 2023 For additional information, contact: Director, Central Midwest Water Science CenterU.S. Geological Survey1400 Independence RoadRolla, MO 65401Contact Pubs Warehouse Bathymetric data were collected at 10 water-supply lakes in north-central and west-central Missouri by the U.S. Survey (USGS) cooperation with Department of Natural Resources collaboration various local agencies, as part a multiyear effort to establish or update surface area capacity tables for surveyed lakes. The June July 2020. Seven had been USGS between 2002 2007, recent surveys compared earlier document changes bathymetric lake produce change map.Bathymetric using high-resolution multibeam mapping system mounted on boat. Supplemental depth two shallow areas an acoustic Doppler current profiler remote-controlled Data points from sources exported gridded resolution appropriate each lake, either 0.82 foot 1.64 feet. outside survey extent greater than water-surface elevation generally obtained aerial light detection ranging (lidar) point cloud data, except Holden City Lake. A linear enforcement technique was used add dataset sparse (the upper ends coves where water aquatic vegetation precluded acquisition) based surrounding upland values. datasets three-dimensional triangulated irregular network lake-bottom elevations lake. table produced showing specified elevations. Various quality-assurance tests conducted ensure quality multibeam, including beam angle checks patch tests. Additional survey, created contours survey.If previous existed given map generated difference 2020 points. After reconciling any vertical datum disagreement coincident identified, data.A decrease observed nearly all which existed, mean positive primary spillway ranged –0.4 percent Edwin Pape Lake 9.4 Higginsville Reservoir. 0.03 Garden New 1.75 feet Harrisonville Lake, corresponds time-averaged 0.002 per year 0.132 computed volumetric sedimentation rate 0.04 4.91 acre-feet respectively; however, substantially larger 42.7 year, corresponding substantial combined relatively shorter interval surveys. also second-largest 5.9 percent. As 2019 surveys, some maps likely result collection equipment techniques Certain apparent erosional features around perimeter certain may be wave action compaction sediments exposed air during low-water years, indicate unidentified but systemic error older singlebeam echosounder data.