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Hydrogeochemistry Evidence of Groundwater Circulation Features in Ordos Cretaceous Basin——A Case Study in Chabu Well Field

SUN Fang-qiang1,2,HOU Guang-cai2,3,DOU Yan2,4,FANG Chang-sheng2,JIANG Jun2,ZHANG Le-zhong21.College of Geological Engineering and Surveying,Chang'an University,Xi'an 710054,China2.Xi'an Center,China Geological Survey,Xi'an 710054,China3.College of Environment and Resources/Institute of Water Resources and Environment,Jilin University,Changchun 130026,China4.College of Environmental Sciences and Engineering,Chang'an University,Xi'an 710054,China  
The authors introduces the hydrogeochemical evidence of groundwater circulation pattern in Chabu well field in Ordos Cretaceous basin based on the horizontal and vertical distribution features of hydrogeochemistry.The horizontal distribution features of hydrogeochemistry and its evolution differences between eastern and western parts of the well field indicates that Groundwater is mainly recharged in eastern part and the groundwater moves form east to west,and discharge in the western parts The vertical distribution features of hydrogeochemistry indicate that groundwater moves downward in the area east to Baolehaoxiao,while upward in in the area west to Baolehaoxiao.The circulation depth of intermidiate groundwater flow system and the regional groundwater flow system is about 150-200 m and 600 m below the land surface respectively.
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