DOI: 10.1016/j.watres.2018.11.052
Scopus记录号: 2-s2.0-85057487006
论文题名: Hydrological drought persistence and recovery over the CONUS: A multi-stage framework considering water quantity and quality
作者: Ahmadi B. ; Ahmadalipour A. ; Moradkhani H.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 97
结束页码: 110
语种: 英语
英文关键词: CONUS
; Dissolved oxygen
; Drought
; Drought recovery
; Turbidity
; Water temperature
Scopus关键词: Biochemical oxygen demand
; Dissolution
; Dissolved oxygen
; Recovery
; Runoff
; Stream flow
; Temperature
; Turbidity
; Water quality
; CONUS
; Dissolved oxygen concentrations
; Hydrological droughts
; Regional characteristics
; Spatial consistency
; Spatial patterns
; Water quality variables
; Water temperatures
; Drought
; dissolved oxygen
; water
; dissolved oxygen
; drought
; gauge
; hydrometeorology
; methodology
; quantitative analysis
; recovery
; streamflow
; turbidity
; water quality
; water temperature
; Article
; drought
; environmental impact
; environmental parameters
; hydrological drought
; particulate matter
; priority journal
; river basin
; runoff
; spatial analysis
; summer
; turbidity
; United States
; water cycle
; water quality
; water quantity
; water supply
; water temperature
; winter
英文摘要: Hydrological droughts have considerable negative impacts on water quantity and quality, and understanding their regional characteristics is of crucial importance. This study presents a multi-stage framework to detect and characterize hydrological droughts considering both streamflow and water quality changes. Hydrological droughts are categorized into three stages of growth, persistence, retreat, and water quality variables (i.e., water temperature, dissolved oxygen concentration, and turbidity) are utilized to further investigate drought recovery. The framework is applied to 400 streamflow gauges across the Contiguous United States (CONUS) over the study period of 1950–2016. The method is illustrated for the 2012 US drought, which affected most of the nation. Results reveal the duration, frequency, and severity of historical droughts in various regions as well as their spatial consistencies and heterogeneities. Furthermore, duration of each stage of drought (i.e., growth, persistence, and retreat) is also assessed and the spatial patterns are diagnosed across the CONUS. Considering the water quality variables, increased water temperature (4 °C on average) and reduced dissolved oxygen concentration (2.5 mg/L on average) were observed during drought episodes, both of which impose severe consequences on ecology of natural habitats. On the contrary, turbidity was found to decrease during droughts, and indicate a sudden increase when drought terminates, due to increase in runoff. Varied drought recovery durations are perceived for different water quality variables, and in general, it takes about two more months for water quality variables to recover from a drought, following the hydrological drought termination. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122100
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, Portland State University, Portland, OR 97201, United States; Center for Complex Hydrosystems Research, Department of Civil, Construction and Environmental Engineering, University of Alabama, Tuscaloosa, AL 35487, United States
Recommended Citation:
Ahmadi B.,Ahmadalipour A.,Moradkhani H.. Hydrological drought persistence and recovery over the CONUS: A multi-stage framework considering water quantity and quality[J]. Water Research,2019-01-01