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<br />February 27, 1998 <br /> <br />0016-,]0 <br /> <br />,;1 <br />I(;~ 1- <br /> <br />Task 11 - Historical Data Extension <br /> <br />Responsibility: Boyle/Ayres <br /> <br />Objective: To develop and implement an extended historical data base for the CRDSS Water <br />Resource Planning Models for use in simulations and analyses. In particular, the time series input <br />data files for the CRDSS models will be affected. These include the baseflow, gage flow, <br />reservoir end-of-month content, reservoir target, historical diversion, and demand data files. Note <br />that climatological files will not be extended under this task. <br /> <br />The intention is to extend the data from 1929 through 1974 and 1992 through 1996 for each <br />basin model. For a limited number of major structures, actual diversion records and reservoir <br />content records will be used for the period prior to 1975. For most reservoirs, average monthly <br />reservoir content will be assumed. For most diversion structures, diversion records will be filled <br />in with average, wet, and dry year diversion estimates that are based on the 1975-1991 historical <br />diversion time series developed under Phase IDa.. Where appropriate, diversion estimates will <br />reflect growing demand, as for municipal growth or industrial use that began during this period. <br />Each basin model will be executed with the extended data set. The respective Phase IIIa <br />calibrations may be refined to reflect the additional information inherent in 1992-1996. The <br />1929-1974 period will be reviewed to validate the data extension process and further confirm the <br />models. The documentation for the extended data set in each basin may identify more reliable <br />and less reliable subsets of the total study period, based on amount of available data and model <br />goodness of fit. <br /> <br />Approach: <br /> <br />11.1 Develop Reservoir Data <br /> <br />Primary Responsibility: Boyle <br /> <br />The CRDSS database does not contain complete end-of-month content data for the period of <br />record for the 50+/- reservoirs that are explicitly modeled in the five water resources <br />planning models. In this subtask, available reservoir content data will be collected and <br />digitized for the study period prior to 1975, and prepared for inclusion in the CRDSS <br />database. <br /> <br />The existing CRDSS database will be reviewed for reservoir end-of-month conJent data. <br />Missing, non-digitized reservoir end-of-month content data will be obtained from readily <br />available published reports or from owners and digitized in a format suitable for inclusion <br />into the CRDSS database by the State or other contractor. It is anticipated that data for minor <br />or privately owned reservoirs may be difficult to gather. For budgeting purposes, it is <br />therefore assumed that data will be digitized for approximately 1.5 struc~res. <br />_.--'......~- <br /> <br />A short task memorandum will be written to describe the sources for additional reservoir data <br />and the methods used to fill in data. The memorandum is expected to be approximately 2 <br />pages in length. <br /> <br />Deliverables: <br />· reservoir end-of-month content observations for approximately 15 structures, in either <br />ASCII or Excel format <br />· Draft and Final reservoir content memorandum <br /> <br />, r <br />P ,W 1t',/l <br />" V" <br />if <br /> <br /> <br />. L-' <br />. c~f.2.IQc'~ <br />t-JD -"'-' - . <br />- t)'c.. <br />.,.r... <br />~ tr-'1 !:rtr......- <br />./ltd':" <br />,$;;& <br /> <br />1 <br />