Author(s): MIAO Lianpeng, WEN Zhongming, ZHANG Li, College of Resources and Environment, Northwest A&F University, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Heilongjiang Agricultural Reclamation Survey Design and Research Institute
Pages: 75-81
Year: 2015 Issue:  5
Journal: Journal of Arid Land Resources and Environment
Keyword:  vegetation; natural recovery of vegetation; benefits of water and sediment reduction; the Yanhe basin;
Abstract: Based on a series of vegetation information and the rainfall,runoff and sediment data,the Yanhe basin was studied as it has significant vegetation change and obvious characteristics of water and sediment. We analyzed the response relationship between vegetation and runoff- sediment,the benefits of water and sediment reduction of natural recovery of vegetation was also estimated. The results showed that the turning point year of runoff and sediment variety in the Yanhe basin was 2003; compared with the 1980’s,increasing precipitation led to runoff increased by 8. 1%,0. 1686 × 108m3,and sediment increased by 47. 5%,1517. 972 × 104t; human activities contributed to runoff reduce by 23. 4%,0. 4862108m3,and sediment reduce by 1173. 707 × 104t; artificial forest- grass vegetation led to runoff decreased 0. 228 × 108m3,and sediment 543. 478 × 104 t,while natural recovery of vegetation led to runoff reduce by 0. 121 × 108m3,and sediment 152. 970 × 104 t. In terms of the impact of human activities on water and sediment variation,the artificial vegetation ratio of benefits of water and sediment reduction by human activities were 46. 94% and 30. 64%; and natural restoration of vegetation were 24.97% and 8. 62%. The results of this study will provide foundations for vegetation restoration in the Yanhe basin.