Remote Sensing Retrieval of Water Transparency for Pingzhai Reservoir Based on Sentinel-2 Images
Journal Title: Bulletin of Soil and Water Conservation - Year 2023, Vol 43, Issue 1
Abstract
[Objective] The variation rule of water transparency and the driving factors of its spatial differentiation were analyzed in order to provide a scientific basis for the management of lake reservoirs and the restoration of lake reservoir ecosystems. [Methods] A remote sensing inversion model of water transparency in Pingzhai reservoir was constructed based on sentinel-2 MSI satellite images and quasi-synchronous measured transparency data collected on May 18, August 26, and November 14, 2020. We quantitatively analyzed the drivers affecting spatial differentiation of water transparency using the GeoDetector package in R. [Results] ① The water transparency of Pingzhai reservoir was most sensitive to the B3 band of Sentinel-2 MSI, and the transparency inversion model constructed by using the band combination B3×B4 as the most sensitive factor had high accuracy (R2=0.81, RMSE=0.11 m, MRE=16.91%). ② The water transparency of Pingzhai reservoir showed a spatial distribution trend of high in the central reservoir area, low in the upstream region of each tributary, and low on both sides of the near water body. Water transparency was greatest in November followed by August and then May. [Conclusion] The contents of total suspended solids, chlorophyll a, and total organic carbon were the main factors affecting the spatial differentiation of water transparency in Pingzhai reservoir. Total phosphorus, total nitrogen, water temperature, and wind speed affected the spatial distribution of water transparency by affecting the content of total suspended solids, chlorophyll a, and total organic carbon in the water.
Authors and Affiliations
Chaocheng Wen, Zhongfa Zhou, Yongliu Li, Jie Kong, Jiangting Xie
Keywords
Related Articles
- EP ID EP762474
- DOI 10.13961/j.cnki.stbctb.2023.01.019
- Views 20
- Downloads 0
Analysis and Simulation of Factors Affecting Soil Saturated Hydraulic Conductivity by Combinations of Grasses and Shrubs with Different Root Configurations
[Objective] The impacts on soil saturated hydraulic conductivity that occur because of differences in root and soil properties between combinations of grasses and shrubs having different root configurations were studied,...
Effects of Desulfurized Gypsum Applied Combined with Polyglutamic Acid on Improving Saline Soil
[Objective] The effects of desulfurized gypsum and polyglutamic acid (γ-PGA) improves saline soil were studied in order to provide a theoretical and technical basis for improving saline soil in Northwest China. [Methods]...
Evaluation on Soil Quality Changes due to Land from Hill Cutting in Beishan Mountain in Lanzhou City
[Objective] The soil quality changes caused by land from hill citting in Beishan Mountain in Lanzhou City were assessed in order to provide a scientific basis and suggestions for land-cutting and land-reclamation project...
Coupling Coordination of High-quality Development with Water Resource Protection and Utilization in Guiyang City During 2010—2020
[Objective] The coupling coordination of high-quality development with water resource protection and utilization in Guiyang City, Guizhou Province, were studied in order to provide a scientific basis for further promotin...
Shear Characteristics of Root-Soil Interface of Caragana Korshinskii in Loess Area of Northeastern Qinghai-Tibet Plateau
[Objective] The effects of different factors on the shear strength index and shear strength of the root-soil interface were analyzed, in order to provide an understanding of the mechanism of shrub root soil fixation and...