SIZING OF TERMINAL UNITS IN SURFACE IRRIGATION PROJECTS: II.

The terminal area process models were used to assess the benefit streams of irrigation projects considering the dynamics of water receipts by farmers. The terminal area processes affect the production performance critically, and, for the case of new irrigation projects, by choosing an appropriate benefit-cost ratio, the corresponding terminal area size n can be determined from the correlation generated between n and the B/C ratio. For irrigation improvement projects such correlation tends to peak at given values of n that can be chosen for further design. The Markov Chain Model (MCM) can be used to assess the nature of the problem in the terminal area and to project the impact of different improvement strategies at the terminal level. The importance of farmer cooperation is demonstrated, and the impact of improving it is demonstrated using typical values of parameters.