DOI: 10.5194/hess-22-1749-2018
Scopus记录号: 2-s2.0-85043537757
论文题名: Characterizing drought in terms of changes in the precipitation-runoff relationship: A case study of the Loess Plateau, China
作者: Zhang Y ; , Feng X ; , Wang X ; , Fu B
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2018
卷: 22, 期: 3 起始页码: 1749
结束页码: 1766
语种: 英语
Scopus关键词: Ecology
; Ecosystems
; Global warming
; Landforms
; Revegetation
; Runoff
; Sediments
; Soil conservation
; Continuous precipitation
; Ecosystem management
; Ecosystem services
; Historical records
; Loess plateau of chinas
; Mean annual precipitation
; Resource management
; Water-limited regions
; Drought
; drought
; ecosystem management
; ecosystem service
; global warming
; historical record
; leaf area index
; precipitation (climatology)
; resource management
; revegetation
; runoff
; water budget
; watershed
; China
; Loess Plateau
英文摘要: The frequency and intensity of drought are increasing dramatically with global warming. However, few studies have characterized drought in terms of its impacts on ecosystem services, the mechanisms through which ecosystems support life. As a result, little is known about the implications of increased drought for resource management. This case study characterizes drought by linking climate anomalies with changes in the precipitation-runoff relationship (PRR) on the Loess Plateau of China, a water-limited region where ongoing revegetation makes drought a major concern. We analyzed drought events with drought durations ≥ 5 years and mean annual precipitation anomaly (PA) values ≤ -5% during drought periods. The results show that continuous precipitation shifts are able to change the water balance of watersheds in water-limited areas, and multi-year drought events cause the PRR to change with a significantly decreasing trend (p<0.05) compared to other historical records. For the Loess Plateau as a whole, the average runoff ratio decreased from 10 to 6.8% during 1991-1999. The joint probability and return period gradually increase with increasing of drought duration and severity. The ecosystem service of water yield is easily affected by drought events with durations equal to or greater than 6 years and drought severity values equal to or greater than 0.55 (precipitation ≤ 212mm). At the same time, multi-year drought events also lead to significant changes in the leaf area index (LAI). Such studies are essential for ecosystem management in water-limited areas. © Author(s) 2018. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79363
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; School of Earth Sciences and Resources, Chang'an University, Xi'an, Shaanxi, China
Recommended Citation:
Zhang Y,, Feng X,, Wang X,et al. Characterizing drought in terms of changes in the precipitation-runoff relationship: A case study of the Loess Plateau, China[J]. Hydrology and Earth System Sciences,2018-01-01,22(3)