The China Inland Surface Water Dataset (ISWDC) plotted water bodies over 0.0625 square kilometers on Chinese land from 2000 to 2016 with a temporal resolution of 8 days and a spatial resolution of 250 meters. It is closely related to national reference data, with determinant coefficients (R2) greater than 0.99 for the years 2000, 2005, and 2010. It has good consistency with the GSW dataset, very similar dynamic changes, and spatial patterns in different regions. The ISWDC dataset can be used to study the interannual and seasonal variations of surface water systems. It can also serve as reference data for validating other surface water datasets, as well as input parameters for regional and global hydroclimate models.
This data is sourced from MOD09Q1（ https://ladsweb.modaps.eosdis.nasa.gov/search/ ）.
This dataset is obtained by updating and improving the threshold segmentation method proposed by Lu et al. (2017), which uses a single wave segment to segment water bodies one by one to extract surface water body boundaries, including removing interference, preliminary drawing of water surface maps, obtaining annual water surface masks, and extracting the last two steps of the water surface boundary method.
The ISWDC is highly consistent with the surface water data derived from the reference land cover. The determination coefficients (R2) for the years 2000, 2005, and 2010 were 0.9974, 0.992, and 0.9932, respectively. The confusion matrix analysis results show that the average accuracy of users over the past 3 years is 91.13%, the average accuracy of producers is 88.95%, and the average kappa coefficient is 0.88.
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CSTR:11738.11.NCDC.ZENODO.DB4012.2023
10.5281/zenodo.2616035