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For both point flow monitoring programs, technical memoranda will be prepare summarizing the <br />data results of the programs and including an analysis of the gains and losses in the tributaries <br />and reaches investigated. <br />3.2.3.6 Flow Routing Data. To meet expressed needs detailed in Chapter 2, the daily <br />time step operations in the planning model maybe enhanced to include flow routing to reflect the <br />time of travel through the system. Additional data collection activities would be required to <br />implement daily flow routing including (1) channel characteristics to establish reach lengths and <br />channel geometry, (2) roughness factors, and (3) slopes along the South Platte River mainstem <br />and major tributaries. <br />3.3 SURFACE WATER DIVERSIONS <br />Historical diversion records are important as a basic water resource data need and for use in <br />water rights administration and modeling. Historical diversion records for existing water rights <br />in Division 1 and Water District 47 will be used in water resources planning models for two <br />primary purposes: (1) to estimate baseflows (pre-development streamflows) and (2) to define <br />water demands under future condition or planning scenarios. A complete and reliable source of <br />historical diversion records available to the State and all water users was a need expressed during <br />the interview process. <br />3.3.1 Description and Inventory of Available Data <br />HydroBase includes daily diversion records (in cfs) for structures diverting in Division 1 and <br />Water District 47. Table B-2 in Appendix B provides an estimate of the number of direct surface <br />water diversions, categorized by average annual diversion volumes, in each Water District. The <br />reported values in Table B-2 are based on estimates developed from the current HydroBase <br />database for Division 1 and Water District 47. A thorough review of appropriate available <br />records in HydroBase should be conducted during the SPDSS development to verify these <br />summary values in Table B-2 and substantiate if the data represent diversions in Division 1 and <br />Water District 47. <br />3.3.2 Data Assessment <br />The available diversion records were reviewed for spatial coverage throughout Division 1 and <br />Water District 47, period of available records, completeness of available records, and overall <br />reliability of the data. Table 3-2 is a general summary of the diversion records adequacy by <br />Water District. Table 3-2 is based on discussions with the staff of the Division 1 Engineer's <br />office and from observation and use of the diversion records. It should be noted that assessment <br />of diversion records for any given structure in a water district could vary significantly from the <br />general assessment presented in Table 3-2 and the discussion below, which analyzes the <br />diversion records for a Water District and summarizes the quality of these records for the entire <br />district. <br />p:data\gen\spdss~final report\chapter 3.doc 3-7 <br />October 31, 2001 <br />