Given the monthly supply requirement established from the definitions of the system Demand, and the definitions of Hydrology, the Supply and Resources section determines the amounts, availability and allocation of supplies, simulates monthly river flows, including surface/groundwater interactions and instream flow requirements, hydropower generation, and tracks reservoir and groundwater storage.
Supply and Resources include the following subsections:
Transmission Links: transmission links carry water from local and river supplies to demand sites, subject to losses and physical capacity, contractual and other constraints.
Rivers and Diversions: surface inflows to rivers, properties and operation of reservoirs and run-of-river hydropower facilities, instream flow requirements, surface water-groundwater interaction, and streamflow gauges.
Groundwater: aquifer properties, storage and natural recharge..
Local Reservoirs: reservoirs not on a river.
Other Supplies: e.g., surface sources that are not modeled in your WEAP application, such as inter-basin transfers or desalination.
Return Flows: wastewater from demand sites can be routed to one or more wastewater treatment plants, rivers, groundwater nodes or other supply sources; treated effluent from wastewater treatment plants can be routed to one or more rivers, groundwater nodes or other supply sources.