Comparison of Digital Elevation Models for the designing water reservoirs: a case study Pskom water reservoir

This study investigates the accuracy of various DEMs (SRTM DEM, ASTER GDEM, and ALOS PALSAR DEM) for area designing Pskom water reservoir (recommended to construction in River, Tashkent region. are compared using Global Mapper application selection Ground Control Points (GCP). The RMSE we calculate is most easily interpreted statistic as square root mean error because it has same units quantity drawn on vertical axis. Results show that SRTM based measurements ground control points (GCPs) exhibit 15.72 m while DEM exhibits 18.47 m, 14.02 Water located plain. There AOS outperforms detecting accuracy. Based capabilities program, can build longitudinal profile approximate location where dam be built each compare. results obtained height 187 at 168 175 SRTM. found data design proposed Reservoir leads a more accurate result. Comparing shows there difference between accuracy; horizontal level almost same. were determining storage volume (W=479368568 3 ) (F=8.31 sq., km) reservoir.