Acta Geographica Sinica ›› 2019, Vol. 74 ›› Issue (11): 2288-2302.doi: 10.11821/dlxb201911007

• Spatio-temporal Coupling of Water-land Elements in Mountainous Areas • Previous Articles     Next Articles

Spatio-temporal variations of precipitation and runoff and analyses of water-heat-human-land matching characteristics in typical mountainous areas of China

JIA Yangwen,HAO Chunfeng,NIU Cunwen,QIU Yaqin,DU Junkai,XU Fei,LIU Huan   

  1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
  • Received:2019-05-14 Revised:2019-10-09 Online:2019-11-25 Published:2019-11-01
  • Supported by:
    National Key Basic Research Program of China(2015CB452701);National Key R&D Program of China(2017YFC0404600);National Key R&D Program of China(2016 YFC0402405)

Abstract:

Mountainous areas in China face complex problems due to conflicts between natural eco-environmental protection and socio-economic development. Mountain water resources have evolved in the context of climate change and human activities, which further affects their coordination and matching with regional climate resources, land resources and socio-economy. Hence, it is of fundamental significance for mountain development to study these issues to identify key weakness and provide solutions. The paper focuses on three typical mountainous areas under different natural geographic conditions and at socio-economic development levels in China, namely, Taihang Mountains Area (TMA), Hengduan Mountains Region (HMR) and Guizhou-Guangxi Karst Area (GKA), and studies the spatio-temporal variations of precipitation and runoff from 1956 to 2015 by Mann-Kendall test based on national water resources assessment results and statistical data of land use and socio-economy. The characteristics of natural and socio-economic factors are analyzed by matching distance and imbalance index. In this process, four groups of parameters are selected, including water (precipitation and runoff), heat (accumulated temperature and radiation), land (total area and farmland area) and socio-economy (population and GDP). The results indicate that, the water resources endowment of TMA is the worst, and significant reduction of runoff since 2000 makes it even worse, while the precipitation and runoff of HMR and GKA are abundant and there is no obvious change trend. According to the analysis of regional water-heat-human-land matching characteristics, TMA mainly suffers from water shortage, land and heat resources have great disadvantages in most parts of HMR with uneven distribution of water and heat, and land resources are relatively deficient in all counties of GKA. In general, mismatching degree of water and other factors is the highest, and the allocation and coordination of water are the key issue for sustainable development of mountainous areas, especially in TMA.

Key words: Taihang Mountains Area, Hengduan Mountains Area, Guizhou-Guangxi Karst Area, imbalance index, hydrology and water resources