Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026132 |
Subannual Streamflow Responses to Rainfall and Snowmelt Inputs in Snow-Dominated Watersheds of the Western United States | |
Hammond, John C.1; Kampf, Stephanie K.2 | |
2020-04-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2020 |
卷号 | 56期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Streamflow generation in mountain watersheds is strongly influenced by snow accumulation and melt, and multiple studies have found that snow loss leads to earlier snowmelt timing and declines in annual streamflow. However, hydrologic responses to snow loss are heterogeneous, and not all areas experience streamflow declines. This research examines whether streamflow generation is different for rainfall versus snowmelt inputs. We compiled a sample of 57 small U.S. Geological Survey watersheds in the western United States containing a Natural Resource Conservation Service Snow Telemetry site and having ratios of mean annual peak snow water equivalent to precipitation ratios >0.25. Daily streamflow was separated into quickflow and baseflow using a digital filter, and quickflow was then divided into quickflow response intervals using thresholds in quickflow slope. Each quickflow response interval was categorized by its fraction of input from snowmelt. Most sites exhibited two streamflow generation peaks each year, with one peak in the winter when runoff efficiency is greatest, and the second in the spring during peak snowmelt input. On average, study watersheds were dominated by snowmelt inputs (70%), and snowmelt and mixed inputs usually generated greater streamflow than rainfall because of higher inputs and longer durations. However, rainfall produced high streamflow generation in winter, when watersheds have their highest runoff efficiency (81%) across all input types. We demonstrate that while snowmelt is important for streamflow generation due to high input over long periods, increases in rain and mixed input during wet winter periods can countervail tendencies for reduced streamflow with declining snowpacks. |
英文关键词 | snowmelt streamflow mountain hydrology hydrologic response |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000538987800021 |
WOS关键词 | CLIMATE-CHANGE ; RUNOFF ; COVER ; FLOW ; VARIABILITY ; TRENDS ; PRECIPITATION ; FREQUENCY ; EVENTS ; AVAILABILITY |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280614 |
专题 | 资源环境科学 |
作者单位 | 1.US Geol Survey, MD DE DC Water Sci Ctr, Baltimore, MD 21218 USA; 2.Colorado State Univ, Dept Ecosyst Sci & Sustainabil, Ft Collins, CO 80523 USA |
推荐引用方式 GB/T 7714 | Hammond, John C.,Kampf, Stephanie K.. Subannual Streamflow Responses to Rainfall and Snowmelt Inputs in Snow-Dominated Watersheds of the Western United States[J]. WATER RESOURCES RESEARCH,2020,56(4). |
APA | Hammond, John C.,&Kampf, Stephanie K..(2020).Subannual Streamflow Responses to Rainfall and Snowmelt Inputs in Snow-Dominated Watersheds of the Western United States.WATER RESOURCES RESEARCH,56(4). |
MLA | Hammond, John C.,et al."Subannual Streamflow Responses to Rainfall and Snowmelt Inputs in Snow-Dominated Watersheds of the Western United States".WATER RESOURCES RESEARCH 56.4(2020). |
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