Spatiotemporal Dataset of Water Supply Service in the Dongjiang Lake Basin (1995-2010)

XU Jie1,2XIAO Yu*1XIE Gaodi1WANG Shuo3ZHU Wenbin1

1 Institute of Geographic Sciences and Natural Resources Research，Chinese Academy of Sciences，Beijing 100101，China2 University of Chinese Academy of Sciences，Beijing 100049，China3 Surveying and Mapping Development Research Center，NASG，Beijing 100830，China

DOI:10.3974/geodb.2017.04.22.V1

Published:Nov. 2017

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Key Words：

water supply service,Dongjiang Lake Basin,InVEST model,1995-2010,Acta Ecologica Sinica

Abstract：

Water supply service is essential for internal water circulation and water balance in river basins. Based on the DEM and Google Earth images, the boundary data of the Dongjiang Lake Basin was developed, 24 sub-basins was identified based on the ArcSWAT model. Integrating the rainfall data and the InVEST model, water yield as well as the water supply services was developed covering the Dongjiang Lake Basin from 1995 to 2010. Variables related to the water yield include precipitation, reference crop evapotranspiration (ET0), water available of a plant, depth of root containment layer and biophysical parameter table. For precipitation data, a multi-year average is required first before obtaining the precipitation-related spatial grid data for four stages by relying on ANUSPLIN4.4 to obtain spatial interpolation. The value of reference crop evapotranspiration is calculated through the corrected FAO56Penman-Monteith formula based on daily meteorological data prior to carrying out multi-year average and ANUSPLIN spatial interpolation. Water available to a plant is derived by use of Soil Water Characteristic calculations in the SPAW Hydrology model. The depth of the root containment layer can be replaced by approximate soil depth. The biophysical parameter table reflects properties of land use/cover property type, including code of land use/cover, the maximum root depth and evapotranspiration coefficient. Because water supply amount is the subtraction of precipitation and actual evapotranspiration which is derived from reference evapotranspiration, the precision check of precipitation and reference evapotranspiration interpolation is significant to the water yield accuracy. The dataset supports the following discoveries: the yearly water supply service covering the Dongjiang Lake Basin is 1100-1600 mm, 750-1700 mm for each of the sub-basins; the yearly water supply service in this region was increased in early years and decreased in later years from 1995-2010; and there is an increased spatial distribution pattern of the water supply service from the lake center to the edges of the lake. The Spatiotemporal dataset of water supply service in the Dongjiang Lake Basin (1995-2010) is consisted of (1) boundary data of 24 sub-basins; (2) water supply services data in 1km resolution covering the Dongjiang Lake Basin in 1995, 2000, 2005 and 2010; (3) statistics of rainfall, evapotranspiration and water reply service covering the Dongjiang Lake Basin in 1995, 2000, 2005 and 2010; (4) statistics of average water supply service for each of land cover types; (5) statistics of water supply service in each of the sub-basins in 1995, 2000, 2005 and 2010. The dataset is archived in .shp、.kmz、.tif and .xlsx data formats, there are 23 data files in total with data size of 21.7MB. 2 compressed data files with the data size of 8.02MB. The analysis result based on the dataset was published in Acta Ecologica Sinica Volume 36, 15th Issue.

Foundation Item：

Ministry of Science and Technology of P. R. China (2013BAC03B05); National Natural Science Foundation of China (31400411)

Data Citation：

XU Jie, XIAO Yu*, XIE Gaodi, WANG Shuo, ZHU Wenbin. Spatiotemporal Dataset of Water Supply Service in the Dongjiang Lake Basin (1995-2010)[J/DB/OL]. Digital Journal of Global Change Data Repository, 2017. https://doi.org/10.3974/geodb.2017.04.22.V1.

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