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<br />GOt1375 <br /> <br />" <br /> <br />...- <br /> <br />DRAFT MEMORANDUM <br /> <br />TO: <br /> <br />File <br /> <br />October 17, 1996 <br /> <br />FROM: <br /> <br />Meg Frantz <br /> <br />SUBJECT: <br /> <br />Task 3.06 Develop return flow data set for aggregated <br />nodes <br /> <br />Introduction <br /> <br />This memo describes the approach and results obtained under task 3,06, Develop return flow data set for <br />aggregated nodes, The objective of this task was as follows: <br /> <br />Specify the modeled timing and location of return flows resulting from diversions by the aggregated <br />irrigation structures, and prepare the Statemod ,rtn, ,dly and ,dds input files, <br /> <br />Approach and Results <br /> <br />Aggregated Irrigation Return flow Locations Based on an inspection of the aggregated irrigated land <br />locations, return flow locations were assigned to the next downstream node for each of the aggregated <br />irrigation structures modeled, <br /> <br />Aggregated Irrigation Return flow Timing Based on an inspection of the aggregated irrigated land <br />locations, return flow timing was estimated to be the same as that used for most other irrigation <br />structures in the Yampa River Basin, This return flow pattern (Table I) is presented below, <br /> <br />Month <br />I <br />2 <br />3 <br />4 <br />Total <br /> <br />Table 1 <br />% Returned <br />75,5 <br />]7,5 <br />5,5 <br />1.5 <br />100 <br /> <br />No changes were made to the Phase 2 ,dly file, Also no changes were made to the Phase 2 ,rtn file, so <br />the ,dds file did not have to be regenerated, <br /> <br />DN.C72-IOI-06/<nh <br /> <br />T ASK306,DOC <br /> <br />BOl,lLE <br />