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<br />.. . - . <br /> <br />try several values) which are used to defiue if in the current month or <br /> <br />week. the hydrologic "state" is dry. wet, or average. The lower limit <br /> <br />on the average state is <br /> <br />(10) . <br /> <br />LB ave .= xl W <br /> <br />UBave = x'1.W <br /> <br />(11) <br /> <br />where <br /> <br />W = 1: <br />hH <br /> <br />The hydrologic states are defined as follows: <br /> <br />S. <br />1max <br /> <br />(12) <br /> <br />[D] dry : <br /> <br />ifR<LB <br /> <br />[A] average <br /> <br />ifLBiRiUB <br /> <br />.[W] wet : <br /> <br />ifR>UB <br /> <br />The user can now define storage targets TD' TA and TW for each reser- <br /> <br />voir. <br /> <br />These targets can change from period to period within a given <br /> <br />year. but not from year to year. Likewise, for weekly increments, they <br /> <br />can change within a 1'1. week period only. Note that if the model is <br /> <br />being used to simulate operations during a critical low flow period. the <br /> <br />user might prefer to represent the states as average, drier, and driest. <br /> <br />With the "hydrologic state" option. only one priority rank is <br /> <br />specified .per hydrologic state for each reservoir. 'The designation of <br /> <br />two priorities OPRPL and OPRPH'for the option of annual or 12 .~eek <br /> <br />changes in targets and priorities is a way of allowing priority to <br /> <br />change with storage. The concept of hydrologic state also serves this <br /> <br />purpose On an aggregate storage level for several reservoirs. <br /> <br />16c <br /> <br />.-...... <br />