Joined in 2023 
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Project applying for (Title and Reference Number as stated in section II.1.1 of the PIN – for WRMP24, this is 1484 WRMP24 – BAF). Oki, T. & Kana, S. Global hydrological cycles and world water resources. Science. 313, 1068–1072 (2006). As the spatial resolution of the digital elevation model (DEM) improves, many hydrological data sets with high spatial resolution have appeared. In 2000, the Earth Resources Observation and Science (EROS) Center of the United States Geological Survey (USGS) developed a data set named HYDRO 1K 8, containing stream lines and basin boundaries based on the global 30 arc-seconds DEM (GTOPO30). The World Wildlife Fund (WWF) in association with the USGS, the International Centre for Tropical Agriculture (CIAT), the Nature Conservancy (TNC), the McGill University, the Australian National University, and the Center for Environmental Systems Research (CESR) have jointly developed the hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales (HydroSHEDS) 9 during 2006 to 2009. The spatial resolution ranges from 3 arc-seconds to 30 arc-seconds. It is superior to other similar data sets at that time and provides essential data support for enhancing river flow modeling 10. The HydroSHEDS v2, which improves upon the quality and limitations of HydroSHEDS v1, will be released in 2023. In 2017, the USGS developed the Hydrologic Derivatives for Modeling and Applications (HDMA) 11 database based on HydroSHEDS, Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010), and the Shuttle Radar Topography Mission (SRTM) 12 in cooperation with NASA Goddard Space Flight Center. Its spatial resolution ranges from 3 arc-seconds (for most of the globe south of 60° N) to 7.5 arc-seconds (for the areas north of 60°N). The spatial resolution of the hydrological data set improved again. In 2019, Yamazaki et al. developed a global hydrological dataset at 3 arc-seconds resolution (~90 m at the equator) named MERIT Hydro 13 based on MERIT DEM 14 and multiple inland water maps. It contains flow direction, flow accumulation, hydrologically adjusted elevations, and river channel width, which have been used in some recent river network studies 15, 16. HydroALTS 17, which is derived from the HydroSHEDS core product, correlates hierarchically nested sub-basins, as well as individual river reaches with hydro-environmental characteristics, providing 56 variables in 6 categories. Yan, D. et al. A data set of inland lake catchment boundaries for the Qiangtang Plateau. Sci Data. 62, https://doi.org/10.1038/s41597-019-0066-x (2019). Yan, D. et al. A data set of global river networks and corresponding water resources zones divisions. figshare, https://doi.org/10.6084/m9.figshare.8044184.v6 (2019).
The combined WRZ: The combined WRZ was defined as a region which contains several rivers flowing into the sea or lake, mainly small watersheds distributed in coastal areas, such as the east coast rivers in the South America. The rivers at L2, L3, and L4 levels in this combined WRZ are shown as follows (Fig. 3b). NASA/METI/AIST/Japan Spacesystems, U.S./Japan ASTER Science Team. ASTER Global Digital Elevation Model. NASA EOSDIS Land Processes DAAC https://doi.org/10.5067/ASTER/ASTGTM.002 (2009).
Our Water Resources Management Plan 2024
Lehner, B., Verdin, K. & Jarvis, A., HydroSHEDS Technical Documentation. World Wildlife Fund US, http://hydrosheds.cr.usgs.gov (2006).
The Trading and Procurement Codesets out how we approach water trading, setting out the policies, principles and requirements that will apply when we trade with appointed water companies and other service providers. Bid Assessment Framework
Our current Water Resources Management Plan (WRMP19)
Linke, S. et al. Global hydro-environmental sub-basin and river reach characteristics at high spatial resolution. Scientific data. 6(1), 1–15 (2019).
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