青藏高原湖泊水质数据集（V1.0，1990，1995，2000，2005，2010，2015）

本数据集包括1990，1995，2000，2005，2010和2015年等6期湖泊总悬浮物浓度、叶绿素a浓度、水体富营养化指数TSI年均值数据。数据源为：Landsat 5和Landsat 8。使用方法：在分析光谱反射率与同步测量的总悬浮物浓度之间的关系的基础上，采用经验方法选择最佳波段组合，建立青藏高原湖泊总悬浮物浓度算法，获得水体总悬浮物浓度，验证精度R²=0.83, RMSE=1.08mg/L。同理：建立青藏高原湖泊叶绿素a浓度算法，获得水体叶绿素a浓度，验证精度R²=0.72, RMSE=0.49μg/L。TSI的结果是基于反演的湖泊透明度（数据已发布在青藏数据中心）和本数据集的叶绿素结果计算得到，其精度依赖于两种水质参数的反演精度（透明度验证精度为R²=0.80, RMSE=92.7cm，叶绿素a验证精度R²=0.72, RMSE=0.49μg/L）。This dataset contains annual average values of three lake water quality parameters across six time periods (1990, 1995, 2000, 2005, 2010, and 2015): total suspended solids (TSS) concentration, chlorophyll-a (Chl-a) concentration, and the trophic state index (TSI). The data were sourced from Landsat 5 and Landsat 8. Usage procedures: Based on the analysis of the relationship between spectral reflectance and in-situ measured total suspended solids concentration, an empirical approach was adopted to select the optimal band combination, and a retrieval algorithm for TSS concentration in lakes on the Qinghai-Tibet Plateau was developed. The retrieval accuracy of TSS was validated with R²=0.83 and RMSE=1.08 mg/L. Similarly, a retrieval algorithm for Chl-a concentration in lakes on the Qinghai-Tibet Plateau was established, and the retrieval accuracy of Chl-a was validated with R²=0.72 and RMSE=0.49 μg/L. The TSI values were calculated using the retrieved lake transparency data (published on the Qinghai-Tibet Plateau Data Center) and the chlorophyll-a results from this dataset. The accuracy of TSI depends on the retrieval accuracies of the two water quality parameters: the validation accuracy of lake transparency is R²=0.80 with RMSE=92.7 cm, while the validation accuracy of chlorophyll-a concentration is R²=0.72 with RMSE=0.49 μg/L.

搜集汇总

背景与挑战

背景概述

该数据集提供了青藏高原湖泊在1990、1995、2000、2005、2010和2015年共6个时间点的水质参数，包括总悬浮物浓度、叶绿素a浓度和水体富营养化指数TSI的年均值数据，数据来源于Landsat 5和Landsat 8卫星影像，并采用经验算法反演，验证精度较高（如总悬浮物浓度R²=0.83）。数据集具有10m-100m的空间分辨率和开放获取的共享方式，适用于湖泊水质长期监测和遥感研究。