Remote sensing estimation of water transparency in Manwan hydropower station based on Forel-Ule Index
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.
transparencyManwan Reservoir arealaws of time and spacedriving factors