GROUNDWATER SYSTEM AND RESOURCESOF THE ORDOS BASIN, CHINA

摘要

The Ordos Basin is a large-scale sedimentary basin in Northwestern China. The hydrostratigraphic units from bottom tornupper are pre-Cambrian metamorphic rocks, lower-Paleozoic carbonate rocks, upper-Paleozoic to Mesozoic clastic rocks and Cenozoicrndeposits. The total thickness is up to 6000m. Three groundwater systems are present in the Ordos Basin, based on the geologicalrnsettings, I.e. the karst groundwater system, the Cretaceous clastic groundwater system and the Quaternary groundwater system. Thisrnpaper describes systematically the groundwater flow patterns of each system and overall assessment of groundwater resources.