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Hydrology 2016, 3(2), 16; doi:10.3390/hydrology3020016

Evaluation of Multiresolution Digital Elevation Model (DEM) from Real-Time Kinematic GPS and Ancillary Data for Reservoir Storage Capacity Estimation

Department of Civil and Structural Engineering, Moi University, Eldoret P.O Box 3900-30100, Kenya
Academic Editor: Luca Brocca
Received: 1 March 2016 / Revised: 20 April 2016 / Accepted: 21 April 2016 / Published: 27 April 2016

Abstract

This study presents the estimation of reservoir storage capacity using multiresolution Real-Time Kinematic Global Positioning System (RTK-GPS) DEM, in comparison with ASTER and contour-derived DEM. Through RMSE comparisons of the elevation point uncertainty and error analysis, the results shows that the RTK-GPS DEM gave the best results for the reservoir capacity-area power curve estimation, defined by a convex slope with an exponential deterministic relationship given by V = 0.09 × A 1.435 . The results further show the existence an empirical relationship between the reservoir volume certainty and the GPS point density d i as V e = c × d i ρ . This relationship is dependent on the reservoir terrain, slope and surface area. Validation of the results with in situ data showed the differences between the simulated and observed storage volumes was less than +10%, and using the Nash-Sutcliffe coefficient of efficiency on the storage volumes, an average efficiency of +0.7 on the monthly observed and simulated reservoir storage volume was observed. View Full-Text
Keywords: reservoir storage capacity; Real-Time Kinematic GPS (RTK-GPS); digital elevation model (DEM); RTK-GPS point density; ASTER Global DEM; topographic contour reservoir storage capacity; Real-Time Kinematic GPS (RTK-GPS); digital elevation model (DEM); RTK-GPS point density; ASTER Global DEM; topographic contour
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Ouma, Y.O. Evaluation of Multiresolution Digital Elevation Model (DEM) from Real-Time Kinematic GPS and Ancillary Data for Reservoir Storage Capacity Estimation. Hydrology 2016, 3, 16.

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