首页|向家坝-清溪场江段沿程短时水温影响因素分析

向家坝-清溪场江段沿程短时水温影响因素分析

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
为深入了解金沙江下游的短时水温变化及其影响因素,基于金沙江下游向家坝水文站至清溪场水文站江段2022 年8 月1 日至2023 年7 月31 日的干、支流水温数据和各测点气温数据,建立了各江段下游水温与上游水温、汇入支流水温和气温的多元回归方程,定量分析了上游水温、支流水温和气温对下游水温的影响程度.结果表明:①上游水温是影响下游水温的最主要因素,影响程度最低为52.7%,最高接近100%;②各江段汇入的支流水温会对下游水温产生较显著的影响,如岷江、嘉陵江和乌江支流,其中岷江支流对下游李庄水位站水温的影响程度高达 45.1%;③气温对下游水温的短时影响程度相对较弱,仅为0.4%～2.2%,远低于上游水温和支流水温的影响程度.研究成果可为下游江段水环境评价和生态保护提供科学依据.
Quantitative analysis of short-term water temperature influencing factors in lower reaches of Jinsha River from Xiangjiaba Hydrological Station to Qingxichang Hydrological Station
To gain a deeper understanding of the short-term water temperature variations and influencing factors in the lower reaches of the Jinsha River,and to quantify their impact,we established a multiple regression model to quantify the influence of upstream water temperature,tributary water temperature,and air temperature on downstream water temperature.The research infor-mation includes the water temperature data of the mainstream and tributaries from August 1,2022,to July 31,2023,in the section from Xiangjiaba Hydrological Station to Qingxichang Hydrological Station in the lower reaches of the Jinsha River and the air tem-perature data from nearby meteorological stations.The results show that:① Upstream water temperature is the primary factor af-fecting downstream water temperature,with an influence ranging from a minimum of 52.7%to nearly 100%;② The water tem-perature from tributaries flowing into various river sections significantly impacts downstream water temperature.For example,the tributaries of the Minjiang River,Jialing River,and Wujiang River notably influence downstream water temperatures,with the Min-jiang tributary affecting the water temperature at the Lizhuang Water Level Station by up to 45.1%;③Air temperature has a rela-tively weak short-term effect on downstream water temperature,ranging from only 0.4%to 2.2%,which is significantly lower than the influence of upstream water temperature and tributary water temperature.

water temperatureair temperaturewater temperature variationmultiple regressionXiangjiaba to Qingxichang river sectiondownstream of the Jinsha River

邢喜旺、唐玉川、毕明亮、张勇、汪雷、谢长江

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中国长江三峡集团有限公司流域枢纽运行管理中心,湖北 宜昌 443000

中国水利水电第八工程局有限公司,湖南长沙 410004

水温 气温 水温变化 多元回归方程 向家坝-清溪场江段 金沙江下游

中国长江三峡集团有限公司技术服务项目中国长江三峡集团有限公司技术服务项目国家自然科学基金项目中国长江三峡集团有限公司员工科研项目

JG/19009BJG/19010B52179130NBYG202300751

2024

10.16232/j.cnki.1001-4179.2024.08.004

人民长江
水利部长江水利委员会

人民长江

CSTPCD北大核心
影响因子：0.451
ISSN：1001-4179
年,卷(期)：2024.55(8)