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Appendix D, Section D.10 describes the development of the aggregated municipal and industrial <br />demands as the difference between M&I diversions explicitly modeled in Phase II and the <br />consumptive use. As presented in the Task memorandum 2.09-11, Non-Evapotranspiration (Other <br />Uses) Consumptive Uses and Losses in the White River Basin (8/16/96). <br />The data sources for each key field in diversion station file (whiteT.dds) are listed below. <br />TABLE 4.2.1c <br />Direct Flow Diversion Data Source Summary <br />Key Field Data Source <br />Ex licit Diversion ID State En ineer's Office <br />A re ated Diversion ID User defined <br />Diversion Ca acit State En ineer's Office <br />Acre Irri ated State En ineer's Office <br />Historic Diversions State En ineer's Office <br />S stem Efficiencies Calculated <br />Return Flow Locations W.W. Wheeler <br />4.2.2 Return Flow Delay File - whiteT.dly <br />The whiteT.dly file describes the estimated re-entry of return flows into the river system. These <br />lagged times represent the combination of surface and subsurface returns. As presented in Table <br />4.2.2a, two patterns were used in the White River basin; neither exceeded six months in duration. <br />Agricultural rights were assigned to return flow Pattern 1. Municipal and industrial rights were <br />assigned to return flow Pattern 4. Appendix C, Section 1.3.3 documents the development of the <br />irrigation return flow patterns. <br />No Phase IIIa enhancements were made which impact the return flow delay file. <br />TABLE 4.2.2a <br />Return Flow Properties (percent) <br />Pattern Month 1 Month 2 Month 3 Month 4 Month 5 Month 6 Total <br />1 75.3 17.0 5.4 1.8 0.5 0 100 <br />4 100 0 0 0 0 0 100 <br />4.2.3 Historic Diversion File - whiteT.ddh <br />Historic diversions are used to estimate baseflows and for calibration. The historical diversion data <br />file summarized in Table 4.2.1a, introduced in Section 4.2.1, contains historic diversion estimates for <br />each of the structures modeled in the basin. <br />The historic diversion file was developed using the Data Management Interface (DMI) demandts for <br />different structure types as follows: <br />Diversion <br />4-7 <br />