JOURNAL OF NATURAL RESOURCES ›› 2017, Vol. 32 ›› Issue (2): 310-320.doi: 10.11849/zrzyxb.20160167

• Resource Evaluation • Previous Articles     Next Articles

Driving Force Analysis of Runoff Attenuationin Tuwei River Basin

SUN Zhao-feng, WANG Shuang-yin, LIU Jing, GU Jin-pu, GONG Wei-long   

  1. College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling 712100, China
  • Received:2016-02-24 Online:2017-02-15 Published:2017-02-15
  • Supported by:
    Scientific Fund of Northwest A & F University, No. QN2009088; Science and Technology Development Foundation of Northwest A & F University, No. A2990215215. ]

Abstract: Tuwei River originates in Shenmu County of Shaanxi Province, China, which is the tributary of the Yellow River with the length of 139.6 km and drainage area of 3 294 km2. There is serious soil erosion in the Tuwei River Basin, and the area of soil erosion is 2 965.3 km2, being about 90% of the whole basin. With the rapid development of industrialization and urbanization, runoff of the Tuwei River is getting less, along with which there are more and more serious water pollution and deteriorating water quality. Research on evolution of water resources in Tuwei River Basin can provide a basic knowledge of the main characteristics and driving factors of water deterioration, which has a significant meaning to the reasonable development and utilization as well as scientific management of the resources. In this study, the annual flow and precipitation data of Tuwei River Basin during 1956-2010 and the annual temperature data of Yulin Station during 1956-2010 were used. Based on Takahashi Koichiro Formula, the evapotranspiration in the basin was calculated and the evolution characteristics of rainfall, runoff and evaporation in the basin were analyzed. And the orderly sequence clustering test method was adopted to find the catastrophe point. According to the method of principal component analysis, the multi-factor influence on runoff attenuation was studied. Besides, by establishing the natural driving force model, the influence of human forces on runoff attenuation was discussed. The results show: 1) Among the essential factors of water cycle, annual runoff has a significant trend of reduction, while the change of annual evaporation and annual precipitation is minor. The most likely catastrophe point is 1978, dividing the whole period of 1956-2010 into reference period (1956 to 1978) which is hardly affected by human activities and measures period (1979 to 2010) which is greatly affected by human activities. 2) Among the factors which affect the runoff attenuation, the weight of human activity and climate factor is 71.1% and 28.9%, respectively. The contribution rate of each factor to the runoff attenuation, from the largest to the smallest, is: woodland and grassland > terrace > silt dam > water consumption > precipitation > evaporation. 3) The index regression model of runoff attenuation and grassland and terrace can objectively reflect the quantitative relationship between runoff attenuation and the driving force factors. The research provides a scientific base for river basin management and water resource utilization.

Key words: human activity, hydrology and water resources, principal component analysis, runoff attenuation, Tuwei River Basin

CLC Number: 

  • P333.1