The Agricultural Runoff rainfall-runoff model allows the user to implement the functionality of the Irrigator Demand Model as a rainfall-runoff model at the Functional Unit level. It is used to represent cropping areas in sub-catchments which are rain-fed and are not part of a command area which receives water from a dam (regulated irrigation). Crop water use and agricultural runoff are represented as part of the rainfall-runoff process. The daily crop water balance is based on the irrigator demand model and the method described in FAO56 (Allen et al, 1998). It models a daily crop water use, and generates runoff from rainfall excess from the functional units. The rainfall excess can be routed as quick flow and slow flow to the river system. Crop use of water from small storages in catchments can be represented by on-farm storagesWater user node#farmstorages(OFS) (also known as check dams in some countries) within the agricultural runoff model.
...