Laserfiche WebLink
<br />February Tl, 1998 <br /> <br />0016J2 <br /> <br />and determine adjustments that need to be made in the development of an estimated diversion <br />pattern for the extended data set. This will be done for municipal demands by straight line <br />interpolation based upon current demands and census data. For industrial diversions, on-line <br />dates will be investigated and diversion trends determined through conversations with owners <br />or Division personnel familiar with the user. This effort will be limited to approximately 10 <br />users that have changed use patterns over the study period. <br /> <br />A task memorandum will be prepared, listing the structures for which changing demand will <br />be estimated, the criteria used to identify those structures, and approach taken to estimate <br />trends. The memo will specify scaling factors to be applied to the wet, average, and dry year <br />diversion estimates to be developed in Task 11.5, from 1929 through 1974. It is assumed that <br />diversions for these structures are available for 1992 through 1996. The memorandum is <br />expected to be 3-5 pages in length. <br /> <br />Deliverables: <br />· Draft and Final memoranda listing structures whose estimated diversions are to be scaled <br />from current values, and scale values to use from 1929 to 1974 <br /> <br />11.5 Develop Historical Diversion Method <br /> <br />Primary Responsibility: Ayres <br /> <br />In accordance with the conclusions of Task 10, missing data for the majority of the structures <br />in the five CROSS Water Resource Planning models will be estimated by averaging available <br />diversion records in each month for each of three hydrologic conditions: average, wet, and <br />dry. Actual computations will be executed by the DMI demandts. In this task, functional <br />enhancements for demandts will be defined, and all the necessary information needed to <br />"drive" the new functions will be developed. <br /> <br />In each basin, at least one indicator gage will be selected, and the period of record reviewed <br />to determine the hydrologic condition for each year in the period 1929 through 1991. <br />Selection of the indicator gage(s) will consider differences in hydrologic condition from sub- <br />basin to sub-basin, and determine the area to which the indicator gage is applicable. For each <br />indicator gage, a hydrologic condition will be determined for each year, and placed in a file as <br />required for the enhanced demandts, as determined to be necessary in the second part of this <br />task. A task memorandum, expected to be 3-5 pages in length, will be prepared to describe <br />the approach and results of this effort. Selection of average, wet, and dry conditions will be <br />reviewed with the State before completing this task. <br /> <br />A functional description of enhancements to demandts will be developed, showing input, <br />output, and logic (from a user point of view) required. The description will consider the <br />DMl's use in developing demand data sets for the stochastic data sequence as well as the <br />extended historical sequence. It is expected to include these capabilities: <br /> <br />· Read the historical diversion data files developed for StateMod in Phase IDa <br />· Read a file which contains an average, wet or dry runoff type year indicator for each <br />year <br /> <br />3 <br />