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<br /> <br />002)51 <br /> <br />. <br /> <br />When a logical analysis of the input data is requested <br />(Section 5.9) the program checks that: <br /> <br />- there is at least one variable export, but not more <br />than the allowable maximum <br /> <br />- the variable bbmbers are greater than zero, but not <br />more than the allowable maximum <br /> <br />- the number of rules is not more than the allowable <br />maximum <br /> <br />- the percentages sum to 100 for any given rule (plus <br />or minus the program tolerance of 0.1) <br /> <br />- successive constraints must be equal to or greater <br />than the one for the last rule (must be greater <br />than or equal to zero for the first rule) <br /> <br />. <br /> <br />Variable exports should be located downstream from the reservoir, <br />or within the reservoir itself. There are no logical checks to <br />verify this prior to the monthly computations. However, in <br />routing allocations downstream, an error message is generated <br />and execution is terminated if the downstream boundary is encoun- <br />tered before the element containing the variable export is <br />reached. <br /> <br />Associated with each variable export is a constraint volume which <br />acts as a capacity limitation (Cards 16-1 to 16-3). The total <br />quantity allocated to a given variable export from all reservoirs <br />using both spill and excess water options cannot exceed the <br />constraint volume. Constraint volumes are time dependent and <br />can be specified for each month of the study. <br /> <br />Because of variable reservoir constraint volumes, capacity limitations <br />within the given reservoir or at intervening downstream reservoirs, <br />the total quantity of water allocated to a given export may not <br />reach the export's diversion point. When this occurs, values for <br />the other exports remain the same, being established by the rule <br />percentages. <br /> <br />The actual monthly quantities allocated, routed, and diverted by <br />each variable export are automatically printed at the end of the <br />run. Descriptive statistics are included. <br /> <br />. <br /> <br />2-16 <br /> <br />(rev. 07/75) <br /> <br />