Where, in this case, the “point of delivery” is where farmers take control of the water – that is, where the Water User Association and Project Authorities hand the water over. Sometimes a turnout (offtake) represents the final point of delivery by an irrigation authority, yet that turnout supplies 100 fields.
Conveyance losses include seepage, spillage, water lost in filling and emptying canals, evaporation from canals, evapotranspiration from weeds along the canals, etc.
The conveyance efficiency includes losses that occur between the point of original diversion and the entrance to the command area, which in some cases may be many kilometers apart.