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首页> 美国政府科技报告 >Contributing Recharge Areas, Goundwater Travel Time, and Groundwater Quality of the Missouri River Alluvial Aquifer near the Independence, Missouri, Well Field, 1997-2008
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Contributing Recharge Areas, Goundwater Travel Time, and Groundwater Quality of the Missouri River Alluvial Aquifer near the Independence, Missouri, Well Field, 1997-2008

机译：密苏里河冲积含水层附近的密集补给区，Goundwater行程时间和地下水质量，密苏里州，井场，1997-2008

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The City of Independence, Missouri, operates a well field in the Missouri River alluvial aquifer. Contributing recharge areas (CRA) were last determined for the well field in 1996. Since that time, eight supply wells have been installed in the area north of the Missouri River and well pumpage has changed for the older supply wells. The change in pumping has altered groundwater flow and substantially changed the character of the CRA and groundwater travel times to the supply wells. The U.S Geological Survey, in a cooperative study with the City of Independence, Missouri, simulated steady-state groundwater flow for 2007 well pumpage, average annual river stage, and average annual recharge. Particle-tracking analysis was used to determine the CRA for supply wells and monitoring wells, and the travel time from recharge areas to supply wells, recharge areas to monitoring wells, and moni-toring wells to supply wells. The simulated CRA for the well field is elongated in the upstream direction and extends to both sides of the Missouri River. Groundwater flow paths and recharge areas estimated for monitoring wells indicate the origin of water to each monitoring well, the travel time of that water from the recharge area, the flow path from the vicinity of each monitoring well to a supply well, and the travel time from the monitoring well to the supply well.

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