Decision Support Systems
4/17/2013 9:26:27 AM
6/11/2008 1:49:45 PM
Decision Support Systems
SPDSS Task 46.2 - Stream Gain/Loss Estimates - Phase 4
This Technical Memorandum summarizes the compilation and analysis of data for the computation of monthly gains and losses for the main stem of the South Platte River and selected tributaries for the study period of 1950-2005.
Decision Support - Doc Type
SB01-157, HB02-1152, SB03-110, HB04-1221, SB05-084, HB06-1313, SB07-122
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SPDSS Phase 4 Task 46.2 <br />Stream Gain/Loss Estimates Technical Memorandum <br />FINAL <br />To: Ray Alvarado <br />From: Camp Dresser and McKee h1c. <br />Jessica Gilliam, Jordan D>17uck, and Gordon McCurry <br />Subject: SPDSS Groundwater Component Phase 4 Task 46.2 Final <br />Stream Gain/Loss Estimates Technical Memorandum <br />Date: April 10, 2008 <br />Introduction <br />The groundwater component of the South Platte Decision Support System (SPDSS) focuses on <br />compiling and evaluating available relevant data to support the Decision Support System (DSS) <br />for the South Platte River watershed and to add the data to HydroBase, the State of Colorado's <br />1lydrological database. T11e SPDSS study area is presented in Figure 1. For the purposes of the <br />SPDSS, the grouundwater study area is divided into two hydrologic regions. The Denver Basin <br />Region includes the bedrock aquifers of t11e Denver Basin. T11e Sout11 Platte Alluvium Region <br />consists of fl1e unconsolidated deposits of t11e Soufl1 Platte River mainstem, extending <br />downstream from just below Chatfield Reservoir to the Nebraska state line at Julesburg. Tl1e <br />South Platte Alluvium Region also includes the alluvium overlying the Denver Basin bedrock <br />aquifers >11 Water Divisions 1 and 2. <br />This task was undertaken for t11e Colorado Water Conservation Board (CWCB) and Division of <br />Water Resources (DWR), under Task 46 of Phase 4 of t11e SPDSS by Camp Dresser & McKee <br />(CDM). Task 46 of the SPDSS includes the collection and analysis of existing data on stream <br />inflows and outflows >11 fl1e main stem of the South Platte River and selected tributaries to <br />characterize stream gains and losses in each reach. The objectives of this task are as follows: <br />To develop estimates of stream gains and losses from groundwater in the main stem of the South <br />Platy River and its tributaries within the study area to be used to help calibrate the alluvial <br />groundwater model being developed under' Task -18. <br />This Technical Memorandum (TM) summarizes the compilation and analysis of data for the <br />computation of monthly gains and losses for the maul stem of the South Platte River and <br />selected tributaries for the study period of 1950-2005. <br />Approach <br />Gains and losses to the key rivers and streams in the study area were estimated using a process <br />developed by the State for the Rio Grande and Republican Rivers. This process involves <br />SPDSS Phase 4 Task 46 Technical Memorandum -Final <br />0~4i 10i0~ <br />
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