Land Use

The Land Use item in the data tree is used to define the items that are on the land surface that affect the hydrology in your model area, including

·         Vegetation distribution, and

·         Irrigation.

Irrigation - The Irrigation option allows you to specify a demand driven irriga­tion scheme with priorities. Activating the Irrigation option creates sev­eral sub-items in the data tree for the irrigation parameters. The Irrigation option requires that both Evapotranspiration and Unsaturated Flow be simulated. For more information see Irrigation Command Areas (V1 p. 252)

Priority Scheme - The priority scheme is used by the Irrigation module to rank the model areas in terms of priority for irrigation. Two options are allowed: Equal Volume or Equal Shortage. If the water is to be distrib­uted based on equal volume, then all cells with the same priority num­ber will receive an equal amount of water, regardless of their actual demand. If the water is to be distributed based on equal shortage, then all cells with the same priority number will receive an amount of water that satisfies an equal percentage of their actual demand. For more information see Irrigation Priorities (V1 p. 261)