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干旱区地理 ›› 2018, Vol. 41 ›› Issue (6): 1184-1193.doi: 10.12118/j.issn.1000-6060.2018.06.06

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Response characteristics of mountainous runoffs of the inland rivers in arid areas of China to watershed meteorological elements and global climate indices

QI Xiao-fan1, LI Wen-peng2, LI Hai-tao2, CUI Hu-qun1, FENG Wei2   

  1. 1 Center for Hydrogeology and Environmental Geology Survey, CGS, Baoding 071051, Hebei, China;
    2 China Institute of Geo-Environment Monitoring, Beijing 100081, China
  • Received:2018-07-22 Revised:2018-09-27 Online:2018-11-25

Abstract: Analysis of mountainous runoffs of the inland rivers in the arid areas of China and their influence factors has great significance in the evaluation of their basin water resources and the insurance of basin economic and ecological safety.Based on mountainous runoffs,precipitation and air temperature data of three sub-basins in Tarim River Basin (TRB),the Aksu River Basin (ARB),Yarkand River Basin (YRB) and Hotan River Basin (HTRB),and Heihe River Basin (HRB),together with four climate indices,the Southern Oscillation Index (SOI),North Atlantic Oscillation (NAO),Arctic Oscillation (AO) and Pacific Decadal Oscillation (PDO) from 1960 to 2012,multi-scale periodicities of the hydrological and meteorological elements,and the response characteristics of the mountainous runoffs to watershed meteorological elements and global climate indices are systematically investigated in this paper by adopting methods of wavelet analysis,including Continuous Wavelet Transform (WT),Cross Wavelet Transform (XWT) and Wavelet Coherence (WTC).The results show that the multi-scale periodicities of SOI are 3-5 a,11-12 a and the multi-scale periodicities of PDO are 4-6 a,9-10 a.The multi-scale periodicities of NAO and AO are 2-4 a in 1960s.The periodicities of precipitation in all basins are 2-4 a,4-7 a,and that of air temperature are 2-5 a.The periodicities of mountainous runoffs are 2-5 a except for the Yarkand River.Whole time significant resonance periodicity of 6-17 a is identified between precipitation and mountainous runoff in YRB,and periodicity of 2-16 a is identified in HRB.Significant resonance periodicities of 3-5 a are identified between air temperature and mountainous runoffs in ARB,YRB and HTRB.The multiple-scale resonance periodicities between runoffs and watershed precipitation and temperature reflect the differences of runoff source compositions and inter-annual dynamics of both runoffs and meteorological elements.The response characteristics of the runoffs to the climate indices are different,which have performance in the significant time-frequency domains and the runoff response time lags.The findings and methods presented here help understand the response of mountainous runoffs of the inland river basins in the arid areas to meteorological elements and climate indices,and expand the knowledge and usable toolbox of approaches that can be used by the related people and scientists to improve eco-hydraulic processes and water resource planning and operations under future climate uncertainty.

Key words: mountainous runoff, climate indices, wavelet analysis, multi-scale periodicity, arid inland river basin

CLC Number: 

  • P339