基于水色指数的漫湾水电站水体透明度遥感估算

Remote sensing estimation of water transparency in Manwan hydropower station based on Forel-Ule Index

透明度作为水体光学性质的基本参数,对描述水环境质量和治理具有较大的现实意义。文章针对漫湾水电站上下游各约10 km范围内透明度长时序监测问题,利用经过精度检验的基于水色指数的透明度反演模型,对该区域进行了透明度遥感估算研究,对漫湾库区10年间透明度时空分布状况进行了分析。结果显示,近10年漫湾库区透明度整体变化不大,水质状况较好,降水、气温等气象因素对透明度的影响显著性较低,与库区水体流速、径流等水文因素存在较大相关性。

Transparency,a fundamental parameter of water optical properties,is of great relevance in describing the quality and governance of the water environment.This article focuses on the long-term monitoring of transparency within a range of approximately 10 km upstream and downstream of the Manwan Hydropower Station.Using an accuracy-tested transparency inversion model based on the Forel-Ule Index,a remote sensing estimation was conducted on transparency in the area.In addition,the spatiotemporal distribution of transparency in the Manwan Reservoir area was analyzed over the past 10 years.According to the results,the overall transparency of the Manwan Reservoir area has not changed much in the past decade,and the water quality is good.The impact of meteorological factors such as precipitation and temperature on transparency is relatively low.However,the transparency is significantly correlated with hydrological factors such as water flow velocity and runoff in the reservoir area.