River flow is critical for vegetation dynamics: Lessons from multi-scale analysis in a hyper-arid endorheic basin
文献类型：期刊论文
| 作者 | Fu, Bojie; Shen, Qin; Gao, Guangyao; Lu, Yihe; Wang, Shuai; Jiang, Xiaohui |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2017-12-15 |
| 卷号 | 603期号:3页码:290-298 |
| 关键词 | Vegetation Cover Desert Riparian Vegetation River Flow Groundwater Heihe River Basin |
| 英文摘要 | Knowledge of the spatio-temporal responses of vegetation dynamics to hydro-climatic factors is important to assess ecological restoration efforts in arid and semiarid areas. In this study, the vegetation dynamics during 20002015 were investigated in the downstream area of the Heihe River Basin (HRB) in Northwest China where an ecological water diversion project (EWDP) commenced in 2000. The spatio-temporal relationships between vegetation cover and climatic factors (precipitation and temperature) and available water resources (river flow and groundwater) were determined. The results indicated that the mean growing season NDVI increased significantly during the period of 2000-2015, and the area of East Juyan Lake (EJL) enlarged to 36.4 km(2) in 2010. The scale effect of the relationships between NDVI and hydro-climatic factors was obvious. At the catchment scale, changes of NDVI were not significantly correlated with climatic factors, but significantly related with the antecedent 1year river flow. River flow played an important role in vegetation growth within approximately 2000m distance from the river bank. At the pixel scale, the changes of NDVI were significantly positive with temperature and river flow in 17.40% and 7.14% of the study area, respectively, whereas significant relationship between NDVI and precipitation occurred in only 0.65% of study area. The suitable water table depth for vegetation growth was between 1.8 and 3.5 m. The increased river flow and recovered groundwater due to the EWDP were critical for the improvement of vegetation cover, whereas the riparian vegetation degraded along some parts of the river bank. It is important to improve integrated watershed management with consideration of spatio-temporal lagged hydro-ecological connections in the study area. (C) 2017 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39098]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Fu, Bojie,Shen, Qin,Gao, Guangyao,et al. River flow is critical for vegetation dynamics: Lessons from multi-scale analysis in a hyper-arid endorheic basin[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,603(3):290-298. |
| APA | Fu, Bojie,Shen, Qin,Gao, Guangyao,Lu, Yihe,Wang, Shuai,&Jiang, Xiaohui.(2017).River flow is critical for vegetation dynamics: Lessons from multi-scale analysis in a hyper-arid endorheic basin.SCIENCE OF THE TOTAL ENVIRONMENT,603(3),290-298. |
| MLA | Fu, Bojie,et al."River flow is critical for vegetation dynamics: Lessons from multi-scale analysis in a hyper-arid endorheic basin".SCIENCE OF THE TOTAL ENVIRONMENT 603.3(2017):290-298. |
入库方式： OAI收割
来源：生态环境研究中心
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