Abstract: The number of research papers,cooperative nations,core authors,major institutions,source publications and key words of Hanjiang River research from 2000 to 2020 are analyzed by using bibliometric approach based on WOS and CNKI databases.Results demonstrate that: the WOS and CNKI databases collected 560 and 533 research papers regarding Hanjiang River Basin from 2000 to 2020,respectively,and this number maintained a steady growth.Authors from 46 countries involved in papers indexed by WOS,of which 86% are from China,mainly in cooperation with the United States and Australia.Chinese researcher Zhang Quan-fa from Wuhan Botanical Garden of Chinese Academy of Sciences has published 43 papers in total,ranking first in the world,staying in the center of the author's cooperation network in the WOS database.The Journal of Hydrology published the largest number of papers in the WOS database,accounting for more than 4%,while the Yangtze River Basin,Resources and Environment ranks top in the CNKI database,covering a proportion of 7.7%.Climate Change and Dangjiangkou Reservoir are common high-frequency keywords in the two databases,indicating that the Hanjiang River Basin is mainly concerned with the Danjiangkou Reservoir area and the impact of climate change on the river basin.The research findings offer scientific support for future research on the Hanjiang River Basin.

Key words: Hanjiang River, WOS, CNKI, cooperation, research trend, bibliometric