中国科学数据（中英文网络版）2023，Vol.8Issue(4)：250-263,14.DOI:10.11922/11-6035.csd.2023.0097.zh
1986-2020年呼伦湖夏季TSI数据集
A dataset of the TSI of Hulun Lake in summer,1986-2020
摘要
Abstract
The Trophic state index(TSI)stands as one of the most direct and effective indices for characterizing the trophic state of water bodies,and the long-time TSI series data are important for monitoring the dynamic shifts in water quality in lakes.In this dataset,we used Landsat-5 TM,Landsat-7 ETM+and Landsat-8 OLI as data sources,and crafted an Algal biomass index(ABI)to investigate its responsiveness to TSI.And through rigorous analysis,we estimated the TSI time series of Hulun Lake for 35 years from 1986 to 2020.Furthermore,we generated spatial maps depicting the mean TSI values in summer.The results revealed a distinctive spatial pattern,characterized by elevated TSI levels in the southwestern region and lower levels in the northeast of Hulun Lake during the summer season.Moreover,there was a noticeable discrepancy between the shoreline and the central area of the lake,with higher TSI values near the shore and lower values in the lake's center.To ensure the reliability and accuracy of the results,we compared the TSI derived from the OLI and the TSI based on measured reflectance ratios,which shows that the root mean square error(RMSE)of less than 2.39,and the mean absolute percentage error(MAPE)of less than 3.53％.The dataset is provided in*.tif format with a spatial resolution of 30 m.Users can leverage professional GIS software to view and edit,or use the relevant python packages or R languages for advanced data processing.The spatial and temporal variation characteristics of TSI reflected in this dataset can provide effective data support for water quality monitoring and ecological protection in Hulun Lake area.关键词
TSI/呼伦湖/长时间序列/LandsatKey words
TSI/Hulun Lake/long time series/Landsat引用本文复制引用
禹政阳,马荣华,许金朵,王贞,胡旻琪..1986-2020年呼伦湖夏季TSI数据集[J].中国科学数据（中英文网络版）,2023,8(4):250-263,14.基金项目
中国科学院"十四五"网络安全和信息化专项(CAS-WX2022SDC-SJ05、CAS-WX2021SF-0306)Network Security and Informatization Plan of Chinese Academy of Sciences(CAS-WX2022SDC-SJ05 & CAS-WX2021SF-0306) （CAS-WX2022SDC-SJ05、CAS-WX2021SF-0306）
