Effects of forest on seasonal runoff in North China

2019 5th International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Lv, Xizhi^1 ; Zuo, Zhongguo^1 ; Sun, Juan^1 ; Ni, Yongxin^1 ; Ma, Li^1 ; Zhang, Yang^1

Yellow River Institute of Hydraulic Research, Key Lab. of the Loess Plateau Soil Erosion and Water Loss Proc. and Contr. of Min. of Water Rsrc., Zhengzhou, Henan

450003, China^1

关键词: Changing trends;    Eco-hydrology;    Graphic analysis;    High flow;    High flow coefficient;    Hydrological data;    North China;    Rocky Mountains;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/295/2/012016/pdf
DOI  :  10.1088/1755-1315/295/2/012016

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The relationship of forest-water is a hot and important issue in ecohydrology studies. The relations between forest and water had been widely investigated, whereas information on the impact of forest on seasonal runoff is still lacking. In this study, the statistical and graphic analyses based on the long-term hydrological data of the 20 watersheds in the rocky mountain area of North China were made to analyse the impact trend of forest on seasonal runoff. The results showed that the low flow coefficient decreases by 3.3 % with a 10 % enhancement of the forest coverage. However, the effects of forest on high flow are much more complex and no obvious changing trends can be observed. With increasing forest coverage (f), the high flow show a trend of "increasing (f60 %)", and there has the largest high flow when f is 20%∼60%, the largest high flow coefficient is about 30%.