2019-2021年海南岛10m内陆水域变化数据集

地表水面精确提取是研究地表水质和水量变化的重要基础。海南岛总体地表水体水资源丰富，分布大量的小型水库和河流。因此本产品以海南省面积大于1km2的湖库水体和宽度大于100m的河流为研究区，采用哨兵2号地表反射率数据，利用NDWI与OTUS自动阈值分割相结合的算法提取海南省水体。本数据集可以为后续海南省水体水质参数反演提供提供基础数据支持。

Accurate extraction of surface water bodies is a fundamental basis for studying changes in surface water quality and quantity. Hainan Island boasts abundant surface water resources, with a large number of small reservoirs and rivers scattered across its territory. Therefore, this dataset takes lake and reservoir bodies with an area greater than 1 km² and rivers with a width greater than 100 m in Hainan Province as the study area. Sentinel-2 surface reflectance data and an algorithm combining the Normalized Difference Water Index (NDWI) and Otsu's automatic threshold segmentation are employed to extract water bodies within Hainan Province. This dataset can provide basic data support for subsequent inversion of water quality parameters in Hainan Province.

搜集汇总

背景与挑战

背景概述

该数据集是一个2019年至2021年海南岛内陆水域变化的10米分辨率栅格数据集，使用Sentinel 2表面反射率数据，通过NDWI和OTUS自动阈值分割算法提取水体信息，重点关注面积大于1平方公里的湖泊和水库以及宽度大于100米的河流。数据集旨在为海南岛内陆水质参数反演、水资源监测和生态保护提供基础数据支持，基于GEE云计算平台生成，并经过云去除和光斑校正等预处理。