Gladstone, Missouri Well Field CRA [43.2 kb]
The shape of the Gladstone, Missouri well field is elongated in the upgradient direction for all pumping river stage scenarios and is similar to the Missouri Cities Water company well field because it also is located next to the Missouri River and close to the alluvial valley walls. Induced recharge from the Missouri River is shown by the location of the 1- and 5-year CRAs located below and next to the river. The total CRA extends for approximately 3 kilometers to the north west from the well field. Its long narrow shape was caused by the capture of ground water by the pumping wells as it flowed down the natural gradient toward the Missouri River, by the alluvial valley walls to the north acting as a flow boundary and by the Missouri River acting as a flow boundary to the south. The 1-year CRA is located next to or beneath the Missouri River for all scenarios because of the short distance ground-water travelled from the bottom of the river bed in layer 2 of the model to the screened interval of the wells in layers 3 and 4 of the model. The 5- and 10-year CRAs are centered around the well field but skewed to the northwest.
Simulated pumping rates for the Gladstone, Missouri well field ranged from 6,540 m3/day for the low-pumping scenarios to 10,895 m3/day for the high-pumping scenarios. The total CRA ranged from 1.914 km2 for the LPHR scenario to 3.669 km2 for the HPLR scenario. The total CRA for the Gladstone, Missouri well field increased in response to increased well pumping and decreased with decreased well pumping. Low river stage increased the total CRA and high river stage decreased the total CRA.
U.S. Department of the Interior, U.S. Geological Survey
Maintainer: Rita Choate, Webmaster
Updated: September 5, 2003
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URL: http://missouri.usgs.gov/indep/kelly/mo-alluvial-gw/cra/gldstn.htm