Journal of Yangtze River Scientific Research Institute ›› 2023, Vol. 40 ›› Issue (4): 24-30.DOI: 10.11988/ckyyb.20211395

• Water Resources • Previous Articles     Next Articles

Changing Characteristics of Blue and Green Water Resources in Hanjiang River Basin and Their Main Influencing Factors

SONG Hui-ling1,2, CHEN Shu1, AO Yuan-hong3   

  1. 1. Hubei Provincial Key Lab of Basin Water Resources and Eco-environmental Sciences, Changjiang River Scientific Research Institute, Wuhan 430010, China;
    2. College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China;
    3. Water Conservancy Authority of Chongqing Municipality, Chongqing 400015, China
  • Received:2021-12-31 Online:2023-04-01 Published:2023-04-26

Abstract: Hanjiang River basin is an important water-supporting area of the middle route project of South-North Water Transfer. The coordinative regulation of water resources in the Hanjiang River basin is conducive to promoting water resources protection and development of the Hanjiang River economic belt. We simulate and analyze the changes in precipitation, temperature, blue and green water resources and their responses to climate variability and land use changes in the Hanjiang River basin from 1985 to 2019 using the SWAT (Soil and Water Assessment Tool) model and mathematical and statistical methods such as the Mann-Kendall (M-K) test. Results elucidate that in the past 35 years, the multi-year average green water resource in the Hanjiang River basin is about 1.74 times higher than the multi-year average blue water resource. Spatially, both blue and green water resources show a trend of gradual increase from the west and north to the southeast. Changes in blue and green water resources in the basin are influenced by both climate and land use, with climate change being the main factor and land use changes being less influential.

Key words: blue water resource, green water resource, SWAT(Soil and Water Assessment Tool) model, climate change, land use change, Hanjiang River

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