| Aiming at the planning problem of irrigation district, introduced the fuzzy concept into the multi objective linear optimization model. This research applied the fuzzy multi objective linear optimization model to optimize the planting structures of several crops from the aspects of e
conomic efficiency and crop water requirement, taking Minqin County in Gansu Province as a case study. The results shown that: The optimal outcome of the model could be quite different under the condition of different tone operators. If we want to increase the regional economic benefits, the planting proportion of food crops should be reduced, while the proportion of economic crops should be increased. If we want to decrease the crop water consumption, should increase the planting proportion of low water consuming crops such as cotton. At the same time, we can see the advantages of the fuzzy optimal method to deal with related problems. |