Author(s): Yicheng Wang, Baoqi Li, Weihua Xiao, Hejia Wang, Hang Fu
Linked Author(s): Baoqi Li
Keywords: Climate change, Land Use/Cover Change (LUCC), runoff variation, Naoli River Basin.
Abstract: In order to make a quantitative analysis of the impact of climate and land use change on annual runoff, the Naoli River basin, which is located in the Sanjiang Plain of northeast China, is selected as a case study area. The impact of climate change on runoff is separated by an analysis of the changing tendency and statistical regression of precipitation and runoff in the Naoli River basin. The relationship between land use change and runoff is analyzed using land use change data since 1986. A statistical simulation model of runoff process is established based on precipitation and the area of paddy field. Results show that, during the study period, both precipitation and runoff decrease significantly and runoff has a sudden change in the year 1967, and a good correlation exists between precipitation and runoff and the correlation coefficient is as much as 0. 9938. Since 1986, due to land use change, especially the significant increase of paddy field, the area of paddy field has become a key factor affecting the runoff change and, thus the correlation coefficient between the area of paddy field and the runoff is 0. 9098. From 1986 to 2010, the rate of runoff change caused by land use change increases from 34. 55% to 70. 83%, which indicates that land use change has an increasingly significant impact on runoff change
Year: 2017