Understanding the impact of climate change on water resource across different regions is highly dependent on hydrological model and data 1. It can provide an important basis and support for reasonable use of water resources and sustainable social development in the world. The dataset provides generated rivers with high prevision and more accurate position, reasonable basin boundaries especially in inland and plain area, also the first set of global WRZ at level 1 to 4 with unified code. Based on the global 90-meter DEM data combined with a large number of auxiliary data, this paper proposed a series of methods for generating river network and water resources zones, and then obtained high-precision global river network and corresponding WRZs at level 1 to 4. In addition, the WRZ code is inconsistent with the river network, hindering the efficiency of data in hydrology and water resources research.

Currently, the river network and WRZ of world are most obtained based on digital elevation model data automatically, which are not accuracy enough, especially in plains. As basic data, the river networks and water resources zones (WRZ) are critical for planning, utilization, development, conservation and management of water resources.

River cities global nit 2019