DOI: 10.5194/hess-24-1985-2020
论文题名: Catchment-scale drought: Capturing the whole drought cycle using multiple indicators
作者: Gibson A.J. ; Verdon-Kidd D.C. ; Hancock G.R. ; Willgoose G.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期: 4 起始页码: 1985
结束页码: 2002
语种: 英语
Scopus关键词: Agricultural robots
; Atmospheric pressure
; Catchments
; Disaster prevention
; Runoff
; Soil moisture
; Topography
; Vegetation
; Agricultural drought
; Indian Ocean dipole
; Initiation and propagation
; Meteorological drought
; Rainfall-runoff response
; Southern Annular Mode
; Southern oscillation
; Traditional approaches
; Drought
; catchment
; disaster management
; drought
; environmental factor
; Indian Ocean Dipole
; rainfall-runoff modeling
; soil moisture
; streamflow
; Australia
英文摘要: Global agricultural drought policy has shifted towards promoting drought preparedness and climate resilience in favor of disaster-relief-based strategies. For this approach to be successful, drought predictability and methods for assessing the many aspects of drought need to be improved. Therefore, this study aims to bring together meteorological and hydrological measures of drought as well as vegetation and soil moisture data to assess how droughts begin, propagate and subsequently terminate for a catchment in eastern Australia. For the study area, 13 meteorological drought periods persisting more than 6 months were identified over the last 100 years. During these periods, vegetation health, soil moisture and streamflow declined; however, all of the indicators recovered quickly post-drought, with no evidence of extended impacts on the rainfall-runoff response, as has been observed elsewhere. Furthermore, drought initiation and propagation were found to be tightly coupled to the combined state of large-scale ocean-atmosphere climate drivers (e.g., the El Niño-Southern Oscillation, the Indian Ocean Dipole and the Southern Annular Mode), whereas termination was caused by persistent synoptic systems (e.g., low-pressure troughs). The combination of climatic factors, topography, soils and vegetation are believed to be what makes the study catchments more resilient to drought than others in eastern Australia. This study diversifies traditional approaches to studying droughts by quantifying the catchment response to drought using a range of measures that could also be applied in other catchments globally. This is a key step towards improved drought management. © 2020 Copernicus GmbH. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162721
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Gibson, A.J., School of Environmental and Life Sciences, Faculty of Science, University of Newcastle, Callaghan, NSW 2308, Australia; Verdon-Kidd, D.C., School of Environmental and Life Sciences, Faculty of Science, University of Newcastle, Callaghan, NSW 2308, Australia; Hancock, G.R., School of Environmental and Life Sciences, Faculty of Science, University of Newcastle, Callaghan, NSW 2308, Australia; Willgoose, G., School of Engineering, University of Newcastle, Callaghan, NSW 2308, Australia
Recommended Citation:
Gibson A.J.,Verdon-Kidd D.C.,Hancock G.R.,et al. Catchment-scale drought: Capturing the whole drought cycle using multiple indicators[J]. Hydrology and Earth System Sciences,2020-01-01,24(4)