Ray
County PWSD no. 2 Well Field CRA [31.4 kb]
The shape of the Ray County Public Water Supply District Number 2 well field (Ray County PWSD No. 2) is an elongated oval, extends approximately 6.5 kilometers to the north west from the well field, and is approximately 1.5 kilometers wide for all pumping, river-stage scenarios. The extent of the total CRA is controlled by the alluvial valley wall to the north east acting as a ground-water flow barrier and to some degree by Fishing River supplying water to the well field from induced recharge. This is illustrated by the west edge of total CRA for all pumping, river stage scenarios coinciding with the course of Fishing River. The long upgradient extent of the total CRA was caused by the interception of ground water by the well field as it flowed down gradient toward the Missouri River.
Simulated pumping rates for the Ray County PWSD No. 2 well field range from 2,460 m3/day for the QUASI scenario to 4,558 m3/day for the HPHR scenario. The total CRA ranged from 4.636 km2 for the QUASI scenario to 7.404 km2 for the HPHR scenario. The total CRA increased with an increase in river stage and increased with an increase in pumping for all pumping, river stage scenarios.
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Updated: September 5, 2003
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URL: http://missouri.usgs.gov/indep/kelly/mo-alluvial-gw/cra/raycnty.htm