Reservoirs used for water supply may reserve a particular volume of their conservation pools for the use of a water storage account holder. The water storage account holders may draw water from their accounts to use for water supply, and their currently available volume of water is determined by tracking credits and debits from their storage account.
ResSim has a water accounting feature that tracks reservoir storage accounts. Water Account Sets are used to define storage accounts within your reservoirs. In order to use the ResSim water accounting feature, you will need to set up a water account set with water account(s) and create reservoir release rules for the water account holder(s). The lower limit of the conservation pool must also be defined. This setup allows ResSim to track the volume in the water account(s). The ResSim Yield alternative type can also use the water accounting feature to calculate water account yield or to size a water account to meet a particular yield. See Appendix F for details on the ResSim Yield feature.
Create a new Water Account Set by selecting New from the Set menu. You will be prompted to give your new water account set a name and description.
Next, from the Reservoir tab, select the reservoir(s) that have water accounts by checking their box(es) in the Active column of the table. Then select the appropriate Operation Set and the lower limit of the Conservation Storage pool. The designated Guide Curve for the operation set is considered the upper limit of the Conservation Storage pool. Click Apply.
Figure: Water Account Set Editor - Water Accounts Tab
From the Accounts menu, select New. You will be prompted to give your water account a name and description. You may create multiple water accounts. For each account, do the following:
Select an account in the lefthand pane of the editor to activate its information. ResSim will display a list of all minimum or specified flow and hydropower rules used in the Water Account Set's active reservoir(s). Choose the rule that represents the release allocated to the water account holder and click Select.
The conservation pool storage allocated to that water account holder is either specified as a percent of the conservation pool volume, or as a total volume. Select the appropriate radio button and enter either the percent or the maximum volume. Click OK.
Note: Water accounting output available in the simulation.dss file includes:
