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r , . Task Noo 1 DATA COLLECTION AND REVIEW ----------------------------------------------------------------- Task El ement No: 1a Identify pertinent data, collect selected surface water records, select study period, and prepare guidelines for USSR's information collection effort. Purpose: To effi c ientl y beg in the data coll ect ion effort, it is vital to identify data requirements prior to the review of reports or collection of large amounts of data. Approach: 1. Based on LRCWE experience in similar determinations of storable flow, a list of the pertinent data requirements for the study will be preparedo 20 Monthly surface water records at major gaging stations in the study area will be collected and statistically analyzed for the determination of an appropriate study period and model cal ibration period. These records will be obtained from the UoS.G.S. WATSTDRE system, from published UoS.G.So reports or from summaries contained in the reports of the Rio Grande Compact Commission. A brief review of study periods used in other studies will also be conducted. A memorandum discussing the study period selection process and a recommended study period and calibration period will be prepared. While the study period will likely include the dry years in the mid-1950's, it is likely that the simulation model will be cal ibrated for a shorter and more recent period due to lack of record availability. 30 Guidel ines for the USBR's data collection effort will be prepared containing the types of information required for the study and the desired format (computer if possible) for transfer to LRCWE. Monthly data is appropriate for use in a this study of storable flowso Work Product: Memoranda discussing the data required and the recommended study period. The study schedule is premised on a one week review period of the recommended study period by study sponsors and subsequent approval. 5 ~ Leonard Rice Consulting Waler Engineers, Inc