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L J�' <br />u <br />' <br />C' <br />' <br />' <br />' <br />� <br />' <br />I � <br />J <br />�J <br />, <br />' <br />IJ <br />, <br />, <br />� <br />3.2.3 Brownell Recharge Site <br />A general observation that is derived from comparing well hydrographs is that the cone of <br />depression caused by the pivot well is quite flat. This conclusion is reached by noting that the <br />drawdown in the pivot well is quite similar to those in monitoring wells located f 1,200 feet <br />away. The ground water levels in the pivot well are more erratic that those in the monitoring <br />wells, but this is probably due to varying lengths of time between well pumping and <br />measurements. The relatively flat cone of depression of a well indicates a high yielding aquifer. <br />The rather significant improvement in ground water levels during periods outside of the time <br />water was in the recharge pit and nearby ditch seems to indicate that recharge is arriving at the <br />site from other sources than the ditch and recharge pit. It is presumed that the principal source is <br />ground water flow from the west and the possibility of a small contribution from upward leakage <br />from the underlying artesian aquifer. <br />Water in the recharge pit and nearby ditch clearly increase the availability of ground water at the <br />site. The monitoring well hydrographs indicate increases in ground water levels of 1.5 to 2.0 feet <br />during the periods when recharge water was available. <br />3.2.4 Recharge Site Northwest of Monte Vista National Wildlife Refuge <br />The recharge site northwest of the Monte Vista National Wildlife Refuge was found to be located <br />over the confining clay so water level measurements of confined waters included in Section 3.1.3 <br />are likely to be only an indication of general recharge to the confined aquifer in this region. <br />3.3 COMPARISON BETWEEN COMPUTER MODEL AND GROUND WATER <br />LEVELS <br />The computer ground water model used to simulate changes in ground water levels resulting <br />from surface recharge was developed by Colorado State University and is called herein the CSU <br />3-13 <br />' <br />