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Lehner, B. & Grill, G. Global river hydrography and network routing: baseline data and new approaches to study the world’s large river systems. Hydrological Processes 27, 2171–2186 (2013). Ostrom, E. A general framework for analyzing sustainability of social-ecological systems. Science 325, 419–422 (2009). Working with the other water companies across the South East to undertake further work on the draft plan for the whole of the South East region, and in turn the draft plan for our area. Stein, J. L., Hutchinson, M. F. & Stein, J. A. A new stream and nested catchment framework for Australia. Hydrology and Earth System Sciences 18, 1917–1933 (2014). HDMA river data, the global river data released by USGS in 2017, is currently widely used in the world and has a certain reference value, which was used for accuracy comparation 13.
Wang, K. et al. A new topological and hierarchical river coding method based on the hydrology structure. Journal of Hydrology. 580, 124243 (2020).Yan, D. et al. A data set of global river networks and corresponding water resources zones divisions. Scientific data. 6(1), 1–11 (2019).
Water companies are required to produce a Water Resources Management Plan (WRMP) every five years which sets out how the company intends to provide a secure and sustainable supply of water to their customers, whilst protecting the environment. Lehner, B., Verdin, K. & Jarvis, A., HydroSHEDS technical documentation, version 1.0. World Wildlife Fund US, 1–27 (2006). Ministry of Water Resources of the People’s Republic of China, Code for china river name (SL 249-2012). We've made minor changes to the cover sheet, changelog and Table 8 in each file. This is to reflect the current position of WRMP19 schemes.Ciais, P. et al. Europe-wide reduction in primary productivity caused by the heat and drought in 2003. Nature 437, 529 (2005).
Our data, overall, has better spatial resolution accuracy and clearer topology relationship than HydroSHEDS. Specifically, in our dataset, the rivers with upstream drainage area larger than 1000 km 2 were sketched according to the real rivers in Google Earth carefully and manually, and then burned into the elevation surface to modify the original DEM and produce correct river network. The river network and corresponding watershed obtained in our study is with a resolution of 3 arc-second resolution (approx. 90 m at the equator). The watersheds and sub-basins were coded based on a new method, which made the river code correspond to its watershed code. By contrast, for the HydroSHEDS database, only large rivers and lakes were burned into the original DEM. The resolution of their released river network and watershed is at 15 arc-second (approx. 500 m at the equator). The watersheds and sub-basins were delineated and coded hierarchically based on the topological concept of the Pfafstetter coding system. The efficiency to calculate the river network relationship decreases when less than 9 divisions are applied. Compared with HDMA Arnold, J. G., Srinivasan, R., Muttiah, R. S. & Williams, J. R. Large area hydrologic modeling and assessment part I: model development 1. JAWRA Journal of the American Water Resources Association. 34(1), 73–89 (1998).Lehner, B., Verdin, K. & Jarvis, A. New global hydrography derived from spaceborne elevation data. Eos, Transactions American Geophysical Union 89, 93–94 (2008). The information provided should help third parties to identify where to look for opportunities. However, it is really important that you come and talk to us about your proposal, as our network and the way we provide services to our customers is subject to a range of factors that can change how beneficial opportunities may be or how, when and where we might be able to use them. If you are interested in pursuing any commercial opportunities arising from this information, please view our Bid Assessment Framework below for further information. The global L1 to L4 rivers obtained in this study are of high accuracy, compared with other data products, such as HydroSHEDS and HDMA river data. Compared with HydroSHEDS 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
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