Global warming has exerted huge impacts on water resources systems. It is crucial to assess the impact of climate change on water resources to scientifically adapt to climate change and effectively support sustainable water resources utilization. Led by Professor ZHANG Jianyun, academician of Chinese Academy of Engineering (CAE), the team of Research Center for Climate Change (RCCC) of Ministry of Water Resources, China has been engaging in the research of climate change impact and its assessment model development over a long term. The RCCC-WBM model proposed by the RCCC team with independent intellectual property rights has been successfully applied to thousands of typical catchments worldwide.

With the leading authors of Professor WANG Guoqing and Professor BAO Zhenxin from Nanjing Hydraulic Research Institute (NHRI), and Professor YANG Qinli from University of Electronic Science and Technology of China (UESTC), RCCC-WBM Model and Its Application for Impact Assessment of Climate Change on Water Resource Variability was officially published as a Technical Report jointly by the World Meteorological Organization (WMO) and the Economic and Social Commission for Asia and the Pacific (ESCAP) in December 2022.

The Technical Report consists of 7 chapters with the focuses on the RCCC-WBM model and its registered software, multi-source data and data quality evaluation, training workshops of the RCCC-WBM model supported by the WMO/ESCAP Typhoon Committee, and the applications of the model in the typical catchments in China, WMO/ESCAP Typhoon Committee Member Countries and Regions, and countries in South America. The research and model development were jointly supported by Hydrological Effect of Environmental Change and Prediction of Water Resources for the Water Conservation Area in the Yellow River Basin (Grant No. 2021YFC3201100), a project funded the National Key Research and Development Program of China in the 14^th Five-Year National Plan, Climate Change and Water Security (Grant No. 52121006), a project funded by the National Natural Science Foundation of China for Innovation Team Development, etc. More than 20 researchers from NHRI, UESTC, Beijing Normal University, Hohai University, North China University of Water Resources and Electric Power, and Nanjing Research Institute of Hydrology and Water Conservation Automation of Ministry of Water Resources participated in the publication work as chapter co-authors.

The publication of this Technical Report will strongly promote the global applications of the RCCC-WBM model and enhance the international academic influence of NHRI and RCCC at the same time.