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Colorado Division of Water Resources <br />912312015 <br />RESPONSE AREA SUMMARY PACKAGE <br />ALAMOSA/LAJARA RESPONSEAREA <br />(Excludes Unconfined Wells in the Rio Grande Alluvium Response Area) <br />Table of Contents <br />Figure 1 Alamosa/La Jara Response Area, Stream Reaches with Response Functions - This figure <br />shows the stream reaches for which Response Functions were calibrated. For the <br />Alamosa/La Jara Response Area there are six stream reaches with Response Functions: <br />1. Conejos River above Seledonia/Garcia Ditches <br />2. Conejos River below Seledonia/Garcia Ditches <br />3. Rio Grande Del Norte to Excelsior Ditch <br />4. Rio Grande Excelsior Ditch to Chicago Ditch <br />5. Rio Grande Chicago Ditch to the State Line <br />6. Alamosa River <br />Table 1a Estimated Historical and Current Year Net Stream Depletions from Groundwater <br />Withdrawals in the Alamosa/La Jara Response Area (acre-feet) -This table provides a <br />summary of the Alamosa/La Jara Response Area's groundwater withdrawal impacts to <br />streams using Response Functions calibrated to the RGDSS Groundwater Model for the <br />time frame of 2001 through 2015. For illustrative purposes, groundwater withdrawal <br />was discontinued after 2015 and the Response Functions were applied to estimate post <br />plan depletions. Net Groundwater Consumptive Use is defined as the groundwater <br />consumed by the operations of one or more wells and represents the difference <br />between groundwater withdrawals less any return flow to the hydrogeologic system. <br />Table 1b Estimated Post Plan Net Stream Depletions from Groundwater Withdrawals in the <br />Alamosa/La Jara Response Area (acre-feet) <br />Figure 2 2001-2015 Estimated Net Stream Depletions and Post 2015 Projected Net Stream <br />Depletions from Groundwater Withdrawals in the Alamosa/La Jara Response Area - <br />The stacked graph shows the combination of Table 1a (historical and current year <br />depletions) and Table lb (post -plan depletions). <br />Table 2 Monthly Net Stream Depletions for 2015 Plan Year in the Alamosa/La Jara Response <br />Area (acre-feet) - This table provides the monthly distribution of Net Stream Depletions <br />for the 2015 Plan Year. <br />Alamosa/La Jara Response Area Page 1 <br />