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<br /> <br />602045 <br /> <br />. <br /> <br />surface storage volume.* Consequently, when the term reservoir <br />level is used, it is considered synonomous with the surface volume. <br /> <br />Volumes for all inputs must be placed on a consistent basis. Nor- <br />mally, all volumes are referenced to an empty base condition and <br />include dead storage. However, it is permissible to subtract <br />dead storage from all volumes, using the top of the dead storage <br />pool as the reference level. However, in this case water will <br />only be removed by evaporation and reservoir inputs down to the <br />dead storage level. Further depletions are not permitted. <br /> <br />The individual input items are now discussed in detail. <br /> <br />Reservoir Inputs - Basic Parameters (Card Types 7-1, 7-2, 7-3) <br /> <br />(1) Bank storage coefficient (Card 7-1). - The bank storage <br />coefficient is defined as the ratio of the volume of water <br />stored in or released from the soils and aquifers surrounding <br />the reservoir to the corresponding change in the surface <br />storage volume. Mathematically: <br /> <br />. <br /> <br />BmK <br /> <br />VB <br />=Vs <br /> <br />(1) <br /> <br />where BmK is the bank storage coefficient (dimensionless)** <br /> <br />VB is the change in volume of water <br />in bank storage <br /> <br />(L3) <br /> <br />Vs is the change in volume of water <br />in reservoir surface storage <br /> <br />(L3) <br /> <br />The total change in storage is: <br /> <br />VT = VB + Vs <br /> <br />or <br /> <br />VT = (l+BmK) Vs <br /> <br />(2) <br /> <br />. <br /> <br />* The term reservoir surface storage volume or surface volume is <br />used to signify the volume of water contained in the reservoir <br />proper and excludes bank storage. <br />** Units for each variable are indicated in parentheses by the <br />symbols L for length and T for time, and dimensionless if there <br />are no units. <br /> <br />2-3 <br /> <br />