| This article has been：Browse 902Times Download 2784Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.2021605 |
|
| Optimizing Allocation of Water Resources in Jinghuiqu Irrigation Area |
|
ZHAO Zhiqiang, LIU Yan, CHEN Yu
|
|
School of Water and Environment, Chang’an University, Xi’an 710054, China
|
| Abstract: |
| 【Objective】For semi-arid areas that are lack of water, rational utilization of water resources for irrigation has become an important way to improve water resource management. The purpose of this paper is to propose an optimization method for improving water resource management for irrigations districts. 【Method】The optimization method is to maximize the overall benefits of the irrigation system and meet the demand of winter wheat and summer maize for water. We established an interval two-stage fuzzy stochastic programming model (TS-FSPM) to optimize the joint utilization of groundwater and surface water in the irrigation area. We applied the model to Jinghuiqu irrigation district as an demonstrating example.【Result】① Hydrologically, in 25%, 50% and 75% level-year, the optimal water allocation of surface water to the winter wheat was 1.82?108~2.02?108 m3, 1.90?108~2.10?108 m3 and 1.90?108~2.10?108 m3 respectively, and of the groundwater was 0.65?108 m3; the optimal surface water allocation to the summer maize was 0.21?108 m3, and of the groundwater was 0.01?108~0.04?108 m3, 0.03?108~0.1?108 m3 and 0.03?108~0.1?108 m3 respectively. Compared with the optimal water allocation, in the 25%, 50% and 75% hydrological level-year, the surface water allocation should be increased by 0.60?108~0.80?108 m3, 0.75?108~0.95?108 m3 and 1.01?108~1.21?108 m3 respectively, while the groundwater allocation should be increased by 0.17?108~0.24?108 m3, reduced by 0.03?108~0.1?108 m3 and 0.20?108~0.23?108 m3 respectively. ② Under the optimal water allocation, the overall maximum income of the irrigation area was 1725.01?106~2417.73 ?106 yuan, about 14% higher than current situation.【Conclusion】The TS-FSPM model established in this paper was suitable for studying optimal allocation of water resources in irrigation areas. For efficient utilization of water resources and ensuring water ecological security, Jinghuiqu Irrigation Area should increase surface water diversion and reduce groundwater exploitation. |
| Key words: water resources; optimal allocation; system benefit; irrigation area |
|
|
