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<br />A~Jn~er season would begin with diversions into tne FLSC on November 15. The FLCC would <br />be protected from injury for executing deferred diversions with appropriate transfers .from the water <br />bank account in Adobe Reservoir, built up over the summer by exchange. Any shortages in this <br />account would be met by releases from Pueblo ReseNoir. Any surplus water bank water in Adobe <br />Creek Reservoir is exchanged to Pueblo Reservoir tffi'l\ard the end of the winter season as flow rates <br />in the river began to decrease. In anticipation ofthe n~xt water bank year, storage accounts, delivery <br />requirements and 2nd-3rd Year return flow obliga~ions would be reviewed. Water would be <br />positioned in storage to meet the anticipated operati~nal requirements. <br /> <br />7.6 Return Flow Analvsis <br /> <br />Main Elements <br /> <br />i <br />! <br />Analysis of return flows is required because only a p~rtion of the water historically diverted by the <br />FLCC is consumed in the irrigation process. Waters not consumed or permanently lost are returned <br />to the river via surface and subsurface flow. Surface return flows, or tail water runoff for the FLCC <br />system are estimated to be only 0.74 percellt of average annual summer diversions as presented in <br />Table A3.5; this flow was therefore not included in th~ example water bank operational accounting. <br />Main elements of this return flow analysis are: : <br />I <br />I <br />Quantity of subsurface return flows from parhcipating shareholder lands; <br /> <br />A. <br /> <br />B. <br /> <br />Location of participating lands with respect to the river; <br /> <br />C. <br /> <br />Soil types, recent cropping patterns and hist~rical timing of irrigation water deliveries; <br />I <br /> <br />Use of laterals and lateral companies for noJmal delivery of participating shares; <br />I <br />, <br />I <br />Physical characteristics of subsurface geology and water-bearing strata, such as (jepth of <br />aquifers, hydraulic conductivity, specific yiel(j and boundary conditions; <br /> <br />D. <br /> <br />E. <br /> <br />F. Data on the receiving stream (Arkansas Riv~r), such as flow records, channel conditions, <br />recharge characteristics and relationships to f:onnected aquifer(s). <br />i <br />! <br />Some of these parameters are presented in Table 7.4. Data were obtained from recent studies of <br />the lower Arkansas River system in connection withiKansas v. Colorado and research documents <br />by the USGS and others. The methods used to <iuantify and predict specific return flows of <br />participating shareholders in the example water ban,k are presented in the following paragraphs. <br /> <br />7-24' <br />