Estimation of water requirement for each area and actual water allocation -Referring to the Thailand gravity irrigation district (3)-

In the previous report, a water demand estimation model in upland field and paddy field was developed. In this paper, water demand of whole district where upland field and paddy field, etc. intermingle, namely the technique of water requirement estimation of the whole district, is developed. As the result, that reuse of water ratio was 10-20% by comparing a water demand by the simulation with actual water supply, almost clarified. Developed gross water requirement estimation model had the good reproducibility.