摘要
定量描述南方多水源灌区灌溉水转化机制是实现灌区水资源高效利用的基础。本文以湖北省漳河灌区内部的杨树垱流域为例,考虑其内部的空间异质性,对流域划分灌溉子区并对灌排系统进行水平和垂向概化,根据水量平衡原理研发多个水平衡子模块,构建沟渠塘库系统水平衡模拟模型。根据2021-2022年典型塘堰和内部水库的实测逐日水位资料,利用拉丁超立方抽样法和偏相关分析法对模型参数进行敏感性分析,并在不同流域尺度上对模型进行率定和验证。模拟结果的Nash-Sutcliffe系数(0.72~0.99)、均方根误差(0.09~0.20 m)和平均绝对误差(0.08~0.14 m)表明模型模拟效果较好,与传统灌区分布式水平衡模拟模型相比,该模型可以在满足较高精度的同时,更为全面地描述灌区水转化过程,为定量描述流域内灌溉系统的水转化过程提供新途径。
Quantitatively describing the irrigation water transformation mechanism in multi-water source irrigation areas in southern China is of great significance in efficient use of water resources in irrigation district.In this study,taking the Yangshudang watershed in Zhanghe irri⁃gation district in Hubei Province of China as a case and considering the spatial difference of irrigation sub-regions,the irrigation and drain⁃age systems were horizontally and vertically generalized,and an irrigation water balance simulation model in ditch-canal-pond-reservoir sys⁃tem was constructed based on the water balance principle.Meanwhile,according to the measured daily water depth of typical ponds and inter⁃nal reservoirs from 2021 to 2022,the Latin Hypercube Sampling method and Partial Correlation Analysis method were used to conduct sensi⁃tivity analysis on model parameters,and the model was calibrated and validated on different watershed scales.The results showed that the range of Nash-Sutcliffe Efficiency(NSE)was between 0.72 and 0.99 in both scenarios,the Root-Mean-Square Error(RMSE)was both within 0.20 m,and the Mean-Absolute Error(MAE)was not more than 0.14 m,which indicates the process of water conversion within the irrigation system can be described effectively by this model.Compared with traditional distributed water balance simulation models for irriga⁃tion district,this model can describe the water transformation process in the irrigation area more comprehensively while satisfying high accu⁃racy,providing a new approach for quantitatively describing the water transformation process in the irrigation system within the basin.
作者
赵学银
罗玉峰
崔远来
周斯航
汤驰
杨洋
李亚龙
ZHAO Xue-yin;LUO Yu-feng;CUI Yuan-lai;ZHOU Si-hang;TANG Chi;YANG Yang;LI Ya-long(State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,Hubei Province,China;Hubei Irrigation Experimentation Centre,jingmen 448000,Hubei Province,China;Changjiang Institute of Survey,Planning,Design and Research,Wuhan 430010,Hubei Province,China;Agricultural Water Conservancy Department,Yangtze River Scientific Research Institute,Wuhan 430010,Hubei Province,China)
出处
《中国农村水利水电》
北大核心
2024年第7期218-228,共11页
China Rural Water and Hydropower
基金
国家自然科学基金项目(U2040213,52379046)。
关键词
沟渠塘库系统
水平衡模拟
灌溉水源结构
参数敏感性分析
ditch-canal-pond-reservoir system
water balance simulation
irrigation water source structure
sensitivity analysis of parameters
