南水北调中线一期工程总干渠输水损失变化规律  

Variation of water loss in the main canal of Middle Route of South-to-North Water Transfer First Stage Project

作　　者：冯志勇 李立群[2] 吴永妍 黄会勇 王磊 FENG Zhiyong;LI Liqun;WU Yongyan;HUANG Huiyong;WANG Lei(Changjiang Institute of Survey,Planning,Design and Research,Wuhan 430010,China;Management Bureau of Trunk Canal of Middle Route Project of South-to-North Water Transfer,Beijing 100038,China)

机构地区：[1]长江勘测规划设计研究有限责任公司水利规划院,武汉430010 [2]南水北调中线干线工程建设管理局,北京100038

出　　处：《南水北调与水利科技（中英文）》2022年第3期600-609,共10页South-to-North Water Transfers and Water Science & Technology

基　　金：长江勘测规划设计研究有限责任公司水利规划院自主研发项目(CZ2019Z04,CX2019Z01)。

摘　　要：为研究已建大型引调水工程运行期输水损失变化,以南水北调中线一期工程为对象,利用水量平衡原理计算得到6个典型渠段2018—2021年不同时间尺度下的输水损失变化过程,并与输水损失经验公式计算结果进行对比。结果表明:不同计算时空尺度下的渠段输水漏损流量结果差异较大,但沿程输水损失率差异较小;入渠流量规模是影响渠段输水漏损流量的主要因素,蒸发量、降雨和冰期冻融等也是造成中线总干渠输水损失时空变化的重要因素,因此仅考虑渠底渗漏损失不能有效反映中线总干渠输水损失变化过程。The main task of water dispatching of long-distance water transfer projects is to properly determine the amount,process,and scope of water transfer based on overall considering the water input and storage situation of headwater area and the water demand in the water receiving area,of which the water loss is the key parameter in organizing the water dispatching plan,and directly affects the dispatching accuracy.Therefore,there is a great significance to achieve accurate dispatching,ensure water supply safety,and improve dispatching management level.However,previous studies mainly focus on the calculation methods of canal seepage,little was known about the variation of water loss during the operation period of long-distance water transfer projects.By integrating the synchronized flow and water level measurements data,the variation process of water loss in the six typical canal sections of the Middle Route of South-to-North Water Transfer First Stage Project over the annually-averaged,monthly-averaged,and daily-averaged timescales from 2018 to 2021 was calculated based on the principle of water balance,and the calculated water loss was also compared to the results of four empirical canal water loss methods including Davison-Wilson,Mauriz,Molesworth,and Kostiakov methods to evaluate the performance and applicability of empirical methods in estimating water loss in long-distance water transfer projects.The results showed that the water loss of the Middle Route of South-to-North Water Transfer First Stage Project exhibited pronounced spatiotemporal variations.The magnitude and change amplitude of loss discharge in the southern canals of the Yellow River were larger than that of the northern canals,but there was a minor difference in loss rate between them,indicating that the amount of inflow canal discharge is the main factor affecting the canal water loss discharge.The calculated water loss by empirical methods varied greatly.Specifically,the averaged water loss calculated by the methods of Davison-Wilson and Kostiako

关 键 词：南水北调中线工程 总干渠 输水损失 水量平衡 空间变化 

分 类 号：TV67[水利工程—水利水电工程]