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Using ground penetrating radar to understand the failure of the Koh Ker Reservoir, Northern Cambodia
Author(s) -
Moffat Ian,
Klassen Sarah,
Attorre Tiago,
Evans Damian,
Lustig Terry,
Kong Leaksmy
Publication year - 2019
Publication title -
geoarchaeology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 44
eISSN - 1520-6548
pISSN - 0883-6353
DOI - 10.1002/gea.21757
Subject(s) - spillway , laterite , geology , excavation , ground penetrating radar , hydrology (agriculture) , wet season , dike , karst , geomorphology , mining engineering , geotechnical engineering , archaeology , radar , geochemistry , geography , paleontology , cartography , engineering , nickel , telecommunications , materials science , metallurgy
Ground penetrating radar, probing, and excavation were used to create a contour map of the topography of a buried laterite pavement forming the spillway of a large abandoned reservoir at the Angkorian‐period city of Koh Ker in Cambodia. Calculations of the flow velocity of water through the spillway, based on the topography of the laterite surface, demonstrate that this outlet was even less adequate for passing the flow of water from the Stung Rongea catchment than had been estimated previously by Lustig, Klassen, Evans, French, & Moffat (2018). We argue that this design flaw contributed substantially to the failure of the reservoir’s dike, possibly during the first rainy season after construction, which may have contributed to Koh Ker’s remarkably short‐lived tenure as the political center of the Khmer Empire.