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• <br />diversion to the Gothenburg and Dawson Canals is 5,484 ac -ft and <br />7,475 ac -ft, respectively. <br />Return flows were routed back to the river using the SDF model SDF <br />View. Return flows associated with pumping groundwater wells were <br />routed back to the river using SDF factors of 60, 120, and 270 days. <br />An average SDF factor of 3250 days was used to route seepage from <br />the Gothenburg and Dawson Canals. An average SDF factor of 300 <br />days was used to route seepage from canal recharge projects in Reach <br />13. Monthly additions to flows in the river occur in months when river <br />accretions exceed diversions to recharge. Monthly depletions occur in <br />months when the diversions to recharge exceed the accretion in that <br />month. The net hydrologic effects associated with each potential <br />project are shown in Tables 8.G.24 through 8.G.32. The average <br />annual net hydrologic effect associated with these recharge projects <br />range from —2,131 ac -ft to —6,931 ac -ft. <br />The water budget spreadsheet was used to route lagged accretions and <br />depletions downstream to the critical habitat. Two routing scenarios <br />were evaluated for the proposed recharge project. The first scenario <br />assumes additional flows can be protected from downstream <br />diversions, in which case, additional flows are not reduced by <br />diversions. The second scenario assumes additional flows cannot be <br />protected from downstream diversions, in which case additional flows <br />are reduced by diversions. Reductions to target flow shortages for <br />recharge projects with a SDF factor of 120 days and the Gothenburg <br />and Dawson recharge projects are summarized in Tables 8.G.33 <br />through 8.G.40. Tables showing monthly net reductions to target flow <br />shortages for the other SDF factors are provided in Appendix F. The <br />average annual reduction to target flow shortages for groundwater <br />pumping recharge projects, and diversions to Gothenburg and Dawson <br />Canals range from 1,097 ac -ft to 9,987 ac -ft without diversions, and <br />from 667 ac -ft to 4,511 ac -ft with diversions. <br />Cost <br />The items that influence the direct costs of recharge projects are <br />described in more detail in the cost sections for representative <br />groundwater recharge /return flow projects in Regions 1 and 2. The <br />total capitalized cost for projects involving pumping to recharge in <br />Reaches 10 and 13 is about $10.2 million and $9.7 million, <br />respectively, as shown in Table 8.G.41. The total capitalized cost for a <br />8 -G -43 <br />