长江科学院院报2025，Vol.42Issue(4)：166-176,11.DOI:10.11988/ckyyb.20231388
三峡库区无资料支流流量遥感监测及其变化分析
Remote Sensing Monitoring and Variation Analysis of Ungauged Tributary Discharge in Three Gorges Reservoir Area
摘要
Abstract
The Three Gorges Reservoir(TGR)area features a large number of tributaries,but the lack of basic hydrological station monitoring leads to the scarcity of hydrological and water-resources information for these tributa-ries,affecting regional water resource management and flood control safety.To address this issue,we selected 20 typical tributaries in the TGR area,among which 18 are ungauged,to build 3D digital river models for these tribu-taries by self-developed remotely-sensed hydrological station technology along with satellite and unmanned aerial ve-hicle(UAV)remote-sensing data.Based on this model,we calculated the river discharges,relative water levels,water-surface widths,and other information from January 2016 to July 2023 for the monitoring sections.Results re-vealed that:1)The cross-sections of 20 typical tributaries in the TGR area display U-shape,demonstrating moun-tainous characteristics.The remotely-sensed hydrological station technology demonstrates high accuracy in calculat-ing ungauged tributary discharges in the TGR area,with the average Nash-Sutcliffe efficiency coefficient(NSE)and coefficient of determination(R2)reaching 0.74 and 0.76,respectively.2)During the study period,the rela-tive water levels of the tributaries changed minimally.The percentages of months with monthly relative water-level fluctuations below 1.2 m in the upper,middle,and lower tributaries of the reservoir were 93.1％,86.8％,and 87.4％respectively.3)The average discharges of typical ungauged tributaries were generally stable.However,trend analysis indicated that the discharges of 13 ungauged tributaries have being decreasing,suggesting an overall downward trend in tributary discharges in the reservoir area.4)The 20 tributaries have abundant annual average and total discharges,with the annual average inflow reaching 16.475 billion m3,accounting for approximately 4.8％of the total annual inflow of the reservoir area,offering substantial water resource support for regional economic de-velopment.关键词
无资料支流/流量/遥感水文站技术/水资源管理/防洪安全/三峡库区Key words
ungauged tributary/river discharge/remote sensing hydrological station technology/water resource management/flood control safety/Three Gorges Reservoir area分类
天文与地球科学引用本文复制引用
娄和震,周柏池,宋文龙,冯天时,杨胜天,孟娟,桂荣洁,刘宏洁..三峡库区无资料支流流量遥感监测及其变化分析[J].长江科学院院报,2025,42(4):166-176,11.基金项目
三峡后续工作项目(JZ110161A0012023) （JZ110161A0012023）
国家自然科学基金项目(U1812401) （U1812401）
第三次新疆综合科学考察资助项目(SQ2021xjkk02400) （SQ2021xjkk02400）
