Runoff responses to climate change in arid region of northwestern China during 1960–2010

Based on runoff, air temperature, and precipitation data from 1960 to 2010, the effects of climate change on water resources in the arid region of the northwestern China were investigated. The long-term trends of hydroclimatic variables were studied by using both Mann-Kendall test and distributed-free cumulative sum (CUSUM) chart test. Results indicate that the mean annual air temperature increases significantly from 1960 to 2010. The annual precipitation exhibits an increasing trend, especially in the south slope of the Tianshan Mountains and the North Uygur Autonomous Region of Xinjiang in the study period. Step changes occur in 1988 in the mean annual air temperature time series and in 1991 in the precipitation time series. The runoff in different basins shows different trends, i.e., significantly increasing in the Kaidu River, the Aksu River and the Shule River, and decreasing in the Shiyang River. Correlation analysis reveals that the runoff in the North Xinjiang (i.e., the Weigan River, the Heihe River, and the Shiyang River) has a strong positive relationship with rainfall, while that in the south slope of the Tianshan Mountains, the middle section of the north slope of the Tianshan Mountains and the Shule River has a strong positive relationship with air temperature. The trends of runoff have strong negative correlations with glacier coverage and the proportion of glacier water in runoff. From the late 1980s, the climate has become warm and wet in the arid region of the northwestern China. The change in runoff is interacted with air temperature, precipitation and glacier coverage. The results show that streamflow in the arid region of the northwestern China is sensitive to climate change, which can be used as a reference for regional water resource assessment and management.

[1]  Yaning Chen,et al.  Responses of streamflow to climate change in the northern slope of Tianshan Mountains in Xinjiang: A case study of the Toutun River basin , 2007 .

[2]  Qi Feng,et al.  Towards sustainable development of the environmentally degraded arid rivers of China — a case study from Tarim River , 2001 .

[3]  Guobin Fu,et al.  Trends of major hydroclimatic variables in the Tarim River basin during the past 50 years , 2010 .

[4]  Guili Sun,et al.  Impacts of climatic change on river runoff in northern Xinjiang of China over last fifty years , 2010 .

[5]  Ye Mao,et al.  The utilization of water resources and its variation tendency in Tarim River Basin , 2006 .

[6]  T. Yao,et al.  Recent glacial retreat in High Asia in China and its impact on water resource in Northwest China , 2004 .

[7]  J. Vaze,et al.  Estimation of Climate Change Impact on Mean Annual Runoff across Continental Australia Using Budyko and Fu Equations and Hydrological Models , 2012 .

[8]  Sushma Panigrahy,et al.  Impact of Climate Change on Runoff of the Major River Basins of India Using Global Circulation Model (HadCM3) Projected Data , 2011 .

[9]  Yaning Chen,et al.  Variation and abrupt change of climate in Ili River Basin, Xinjiang , 2010 .

[10]  D. Easterling,et al.  Homogeneity adjustments of in situ atmospheric climate data: a review , 1998 .

[11]  Yaning Chen,et al.  Effects of climate change on water resources in Tarim River Basin, Northwest China. , 2007, Journal of environmental sciences.

[12]  Meng Ji-jun,et al.  Research on runoff variations based on wavelet analysis and wavelet neural network model: A case study of the Heihe River drainage basin (1944?2005) , 2007 .

[13]  Hui Tao,et al.  Trends of streamflow in the Tarim River Basin during the past 50 years: Human impact or climate change? , 2011 .

[14]  C. A. McGilchrist,et al.  Note on a Distribution-free CUSUM Technique , 1975 .

[15]  Ligang Xu,et al.  Spatial and temporal variability of annual and seasonal precipitation over the desert region of China during 1951–2005 , 2010 .

[16]  Jean-Luc Probst,et al.  Evidence for global runoff increase related to climate warming , 2004 .

[17]  B. Mitchell,et al.  Experiences From Indonesia and Malaysia , 2000 .

[18]  R. Fantechi.  Effects Of Climate Change , 1993 .

[19]  Jun Yu Li,et al.  Shift trend and step changes for runoff time series in the Shiyang River basin, northwest China , 2008 .

[20]  Jun Yu Li,et al.  Monotonic trend and abrupt changes for major climate variables in the headwater catchment of the Yellow River basin , 2008 .

[21]  E. Barrett.  Impact of climate , 1974, Nature.

[22]  Juraj M. Cunderlik,et al.  Hydrological extremes in a southwestern Ontario river basin under future climate conditions/Extrêmes hydrologiques dans un basin versant du sud-ouest de l'Ontario sous conditions climatiques futures , 2005 .

[23]  T. McMahon,et al.  Detection of trend or change in annual flow of Australian rivers , 1993 .

[24]  J. Probst,et al.  Long range streamflow and world continental runoff fluctuations since the beginning of this century , 1987 .

[25]  J. Y. Li,et al.  Impact of Climate Change on Water Resources in the Tarim River Basin , 2004 .

[26]  Zongxue Xu,et al.  Eco‐hydrology and sustainable development in the arid regions of China , 2009 .

[27]  Yaning Chen,et al.  Impacts of Climate Change and Human Activities on the Surface Runoff in the Tarim River Basin over the Last Fifty Years , 2008 .

[28]  Liu Chao-hai,et al.  Response of Valley Glaciers in Various Size and Their Runoff to Climate Change , 2001 .

[29]  T. A. Buishand,et al.  SOME METHODS FOR TESTING THE HOMOGENEITY OF RAINFALL RECORDS , 1982 .

[30]  H. Alexandersson.  A homogeneity test applied to precipitation data , 1986 .

[31]  H. B. Mann.  Nonparametric Tests Against Trend , 1945 .

[32]  J. M. Waller,et al.  Effects of climate change. , 2001 .

[33]  Jianhua Xu,et al.  The Nonlinear trend of runoff and its response to climate change in the Aksu River, western China , 2011 .

[34]  T. Yao,et al.  Recent glacial retreat in High Asia in China and its impact on water resource in Northwest China , 2004 .