XU Li-gang, ZHOU Hong-fei, LI Yan, LI Hui, TANG Ying. Analysis of the precipitation stability and variety trend in the desert region of northern China[J]. Advances in Water Science, 2008, 19(6): 792-799.
Citation: XU Li-gang, ZHOU Hong-fei, LI Yan, LI Hui, TANG Ying. Analysis of the precipitation stability and variety trend in the desert region of northern China[J]. Advances in Water Science, 2008, 19(6): 792-799.

Analysis of the precipitation stability and variety trend in the desert region of northern China

  • With the run theory,the displacement and extremum deviation theory,the stability of precipitation are analyzed by the rmnthly precipitation data from 35 sites in the desert region of northern China during 1951-2005.Based on the MannKendall rank statistic method and 2-parameterrainfall concentration index and interannual rainfall variability,the characteristics of precipitation in the temporal and spatial variety are analyzed.Results indicate that:(1) In every where,the probability of high-flow year alone is higher than that of low-flow year alone,and the probability of low-flow year in succession is higher than that of high-flow year in succession,and (2) in extreme arid regions and arid regions,such as Xmjiang,Qinhai and Gansu,the probability of precipitation increase 83% and 70% respectively.On the contrary,in semi-arid regions,like Inn Mongolia,the probability of precipitation decreases by 58%.
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