| The intensifying of global climate change has more and more influence on hydrological water resources since the1970s. Through the change of the atmospheric circulation and snow and ice conditions and increase evaporation, the climate change cause a series of change of precipitation and evaporation, seepage, soil moisture, runoff and underground runoff, etc. Furthermore it change the hydrologic cycle state of the world, which cause distribution of water in time and space and the change of the quantity of water resources. And further, it will influence the management of water resources and the human society. Therefore, the analysis of climate change influence on the hydrological water resources appears very important. The study of the influence of climate factors on runoff can help to realize the forecast of runoff changing trend and reasonable development, configuration and use of runoff, ensure the sustainable use of water resources, which is of great theoretical significance and practical significance for planning and design, development, utilization and operation management of the water resources system.This paper adopts detrended fluctuation analysis (DFA) and R/S analysis to figure out the trends of climate factors (temperature, precipitation and evaporation) and runoff with Sanggan River, Bai River, Chao River and Yongding River. And use the relevant analysis and the grey relational analysis method to find the relationship between climate factor and runoff with four rivers. Conclusions Follows.The main influencing factor on runoff is the rainfall with Sanggan River, Bai River, Chao River while the temperature plays the most important role with Yongding River on runoff. This is mainly because Yongding River is the kind of river which takes seasonal snow melt water as the main runoff supply, and the waved temperature in winter, spring and non-flood season caused seasonal melting snow water changes, which greatly affect amount of river runoff. |
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