基于地下水安全的井渠结合灌区节水潜力分析——以永定河流域张家口段为例  

Water-saving potential analysis of irrigation districts with conjunctive use of groundwater and surface water based on the concept of groundwater safety:A case study of Zhangjiakou section in the Yongding River Basin

作　　者：李晓倩 彭致功[1,2] 张宝忠[1,2] 徐海洋 魏征[1,2] LI Xiaoqian;PENG Zhigong;ZHANG Baozhong;XU Haiyang;WEI Zheng(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;National Center for Efficient Irrigation Engineering and Technology Research,Beijing 100048,China;Yongding River Investment Co.,Ltd.,Beijing 100193,China)

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038 [2]国家节水灌溉北京工程技术研究中心,北京100048 [3]永定河流域投资有限公司,北京100193

出　　处：《水资源与水工程学报》2022年第2期203-208,215,共7页Journal of Water Resources and Water Engineering

基　　金：国家重点研发计划项目(2018YFC0407703);永定河流域投资有限公司项目(ID0203A532020)。

摘　　要：农业节水潜力是确定节水灌溉发展方向以及解决水资源短缺问题的关键参量。为探究永定河流域张家口段井渠结合灌区的节水潜力,将农业节水潜力分为管理节水潜力与工程节水潜力两类,通过引入地下水安全性检验方法,避免井渠结合灌区实现节水潜力后存在地下水超采风险,建立了满足地下水安全的井渠结合灌区节水潜力分析方法。结果表明:永定河流域张家口段大中型灌区现状灌溉用水总量为1.62×10^(8)m^(3),以常规方法估算的地表水节水潜力为0.8059×10^(8)m^(3),考虑地下水安全的地表水节水潜力修正为0.7954×10^(8)m^(3),其中管理节水潜力和工程节水潜力分别为0.6105×10^(8)和0.1850×10^(8)m^(3),分别占比76.7%和23.3%,管理节水潜力所占比重较大。永定河流域张家口段大中型灌区的管理必须改变以往重工程建设轻灌溉管理的理念,才能更大程度地挖掘管理节水潜力。研究结果可以在保证井渠结合灌区地下水安全的前提下,对灌区的管理节水潜力与工程节水潜力的占比进行科学评价,对未来灌区灌溉工程规划和建设等方面具有现实的参考意义。Agricultural water-saving potential plays an important role in the determination of the development direction of water-saving irrigation and the solution of water shortage problems.In order to explore the water-saving potential of irrigation districts with conjunctive use of groundwater and surface water in Zhangjiakou section of the Yongding River Basin,the agricultural water-saving potential was divided into two categories,namely,management water-saving potential and engineering water-saving potential.To avoid the risk of groundwater over-exploitation in the irrigation districts after they fulfilled their full water-saving potential,the groundwater safety test method was introduced to establish an analysis method that met the groundwater safety requirements.The results showed that the current water consumption of the large and medium-sized irrigation districts in the Zhangjiakou section of the Yongding River Basin totalled 1.62×10^(8) m^(3),the surface water-saving potential estimated by conventional method was 0.805 9×10^(8) m^(3),and then revised to 0.795 4×10^(8) m^(3) after the consideration of groundwater safety,of which the management water-saving potential and engineering water-saving potential were 0.610 5×10^(8) m^(3) and 0.185 0×10^(8) m^(3),accounting for 76.7% and 23.3%,respectively.The management water-saving potential accounted for a larger proportion.The phenomenon of heavy engineering construction and light irrigation management in the large and medium-sized irrigation districts of Zhangjiakou section of the Yongding River Basin must be addressed in order to tap the management water-saving potential to a greater extent.The proportion of management water-saving potential and engineering water-saving potential of the irrigation districts with conjunctive use of groundwater and surface water can be accurately evaluated using the proposed analysis method under the premise of groundwater safety,and the research results have practical guiding significance for the future planning and construction

关 键 词：农业节水潜力 地下水安全 井渠结合 永定河流域 

分 类 号：TV213.4[水利工程—水文学及水资源]