西辽河平原区水资源供需平衡分析

Analysis of water resources supply-demand balance in the plain of West Liaohe River

西辽河平原区河道沙化现象日益突出,引发了一系列的生态环境问题,水资源匮乏是河道沙化的主要原因。利用MIKE BASIN软件,建立了西辽河平原区水资源管理规划模型,根据平原区水循环的特点,在流域关键节点径流量、供水量及水资源蓄变量3个方面对模型进行了验证,结果令人满意。利用建立的模型,基于3次平衡理论对研究区2020水平年水资源供需状况进行了分析。结果表明:西辽河平原区缺水程度为24.7%,属资源性缺水,强化节水及跨流域调水是解决本区水资源供需矛盾的有效措施。采取强化节水措施后,减少需水占一次平衡缺水的63.6%,引绰济辽跨流域调水工程实施后,受水区水资源短缺问题得以缓解,通辽市科尔沁区地下水位有望每年回升0.16 m。

River desertification is increasingly prominent in the plain of West Liaohe river. A series of ecological environment problems have been triggered, water resources shortage is the main cause of the river desertification. A planning model of water resources management within the plain of West Liaohe River was established with the MIKE BASIN software. The model was validated in three aspects including runoff, water supply and water storage variation of the watershed key nodes according to the characteristics of water cycle in plain area, the results were satisfactory. The supply and demand status of water re- sources in the 2020 level year of the study area was analyzed using the established models based on water resources three - time allocation theory. The results showed that, the water shortage degree was 24.7% in the plain of West Liaohe River, which belonged to resource shortage. Strengthening water saving and inter - basin water transfer were effective measures to solve the contradiction between water resources supply and demand in this area. Water demand was reduced by 63.6% after taking the strengthening water saving measure. After the inter basin water transfer project of water regulation from Chuo river to West Liaohe river is implemented, water shortage problems can be alleviated in the water receiving area and the groundwater level is expected to rise 0.16m every year in Horqin district of Tongliao City.