干旱区生态环境知识资源中心(Arid): On the hydrological difference between catchments above and below the intermittent-persistent snow transition

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DOI	10.1002/hyp.14411
	On the hydrological difference between catchments above and below the intermittent-persistent snow transition
	Harrison, Hannah N.; Hammond, John C.; Kampf, Stephanie; Kiewiet, Leonie
通讯作者	Harrison, HN (corresponding author), Simon Fraser Univ, Dept Geog, Burnaby, BC V5A 1S6, Canada.
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2021
卷号	35 期号:11
英文摘要	Because of the importance of snow for river discharge in mountain regions, hydrological research often focuses on seasonally snow-covered zones. However, in many basins the majority of the land surface area is intermittently snow-covered. Discharge monitoring in these areas is less common, so their contributions to downstream rivers remain largely unknown. We evaluated hydrological differences between three intermittently snow-covered (mean annual Jan 1-Jul 3 snow persistence <60%) and two seasonally snow-covered headwater catchments in the Colorado Front Range. We compared water balance variables to evaluate how and why discharge differs between the snow zones and estimated the relative contributions from each snow zone to regional river discharge. We focused on water years 2016-2019 and used a combination of in situ sensors and regional climate datasets. Annual discharge from the intermittent snow zone was low for all three catchments (10-77 mm), despite covering a wide range in annual snow persistence (25%-64%), whereas annual discharge from the seasonal snow zone was up to 73 times higher. Soil moisture in the seasonal snow zone was above field capacity for longer periods of time than in the intermittent snow zone, and the intermittent snow zone was uniquely subject to soil freezing (up to 102 days per year). For most of the year, potential evapotranspiration exceeded rainfall and snowmelt inputs in the intermittent snow zone, but was lower than rainfall and snowmelt inputs in the seasonal snow zone. This is likely a primary driver of the differences in soil moisture and discharge for catchments with a seasonal versus intermittent snow cover. Despite the large difference in discharge between these two snow zones, the intermittent snow zone contributed about a quarter of the discharge in the regional river, highlighting the importance of studying discharge generation across all elevations.
英文关键词	elevation mountain hydrology seasonal snow zone semi-arid snow persistence snowpack soil moisture streamflow generation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000723020900025
WOS关键词	SOIL-MOISTURE ; STREAMFLOW GENERATION ; SWISS ALPS ; RUNOFF ; RAINFALL ; REGIONS ; TRENDS ; FLOW ; VARIABILITY ; ELEVATION
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/373787
作者单位	[Harrison, Hannah N.; Hammond, John C.; Kampf, Stephanie; Kiewiet, Leonie] Colorado State Univ, Dept Ecosyst Sci & Sustainabil, Ft Collins, CO 80523 USA; [Kiewiet, Leonie] Idaho State Univ, Dept Geosci, Pocatello, ID 83209 USA; [Hammond, John C.] US Geol Survey, MD DE DC Water Sci Ctr, Catonsville, MD 21228 USA
推荐引用方式 GB/T 7714	Harrison, Hannah N.,Hammond, John C.,Kampf, Stephanie,et al. On the hydrological difference between catchments above and below the intermittent-persistent snow transition[J],2021,35(11).
APA	Harrison, Hannah N.,Hammond, John C.,Kampf, Stephanie,&Kiewiet, Leonie.(2021).On the hydrological difference between catchments above and below the intermittent-persistent snow transition.HYDROLOGICAL PROCESSES,35(11).
MLA	Harrison, Hannah N.,et al."On the hydrological difference between catchments above and below the intermittent-persistent snow transition".HYDROLOGICAL PROCESSES 35.11(2021).