干旱区生态环境知识资源中心(Arid): Summer runoff generation in foothill catchments of the Colorado Front Range

Arid

DOI	10.1016/j.jhydrol.2020.125672
	Summer runoff generation in foothill catchments of the Colorado Front Range
	Bukoski, Isaac S.; Murphy, Sheila F.; Birch, Andrew L.; Barnard, Holly R.
通讯作者	Barnard, HR (corresponding author), 4001 Discovery Dr, Boulder, CO 80303 USA.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2021
卷号	595
英文摘要	Climatic shifts, disturbances, and land-use change can alter hydrologic flowpaths, water quality, and water supply to downstream communities. Prior research investigating streamflow generation processes in mountainous areas has largely focused on high-elevation alpine and subalpine catchments; less is known about these processes in lower-elevation foothills and montane catchments. In these lower-elevation ecoregions, precipitation shifts seasonally from snow to rain, which can result in differing seasonal flowpaths. We analyzed stream water for electrical conductivity, SiO2, Ca, Mg, Na, Cl, SO4, K, and dissolved organic carbon on both a weekly and storm event basis from April to August 2018 in three small (<10 km(2)) foothill catchments, and one larger (63.2 km(2)) catchment extending from the foothills to the subalpine ecoregions, in the Colorado Front Range. Using two end-member hydrograph separations and concentration-runoff relationships, we inferred the dominant catchment-scale flowpaths of precipitation to the streams. We selected catchments with varying land use to investigate the relationship between these characteristics and hydrologic flowpaths. We observed that concentrations of lithogenic constituents generally increased and dissolved organic carbon decreased as seasonal runoff decreased in the three foothill catchments, reflecting a transition from shallow subsurface flowpaths to deeper subsurface flowpaths. Elevated SO4 and Cl concentrations during low-flow periods in two of our catchments suggest that historical or current anthropogenic activities, such as mining, application of road salt, and/or near-stream septic systems, affect local stream and groundwater chemistry. In a foothill catchment with anthropogenic and geologic impervious surfaces, streamflow during storm responses was sourced from faster, surficial flowpaths compared to a less disturbed neighboring catchment, highlighting the influence of anthropogenic land-use on runoff generation. This study provides insight into the fundamental hydrology of foothill catchments and how they may function in the future with human development, precipitation shifts and disturbances.
英文关键词	Semi-arid Streamflow generation Montane Disturbance hydrology Water quality
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000641592600015
WOS关键词	DISSOLVED ORGANIC-CARBON ; STREAM WATER CHEMISTRY ; HYDROGRAPH SEPARATION ; HYDROLOGICAL PROCESSES ; DISCHARGE RELATIONS ; FORESTED CATCHMENT ; STABLE-ISOTOPES ; EVENT WATER ; FLOW PATHS ; ROAD SALT
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368870
作者单位	[Bukoski, Isaac S.; Birch, Andrew L.; Barnard, Holly R.] Univ Colorado, Dept Geog, Boulder, CO 80309 USA; [Bukoski, Isaac S.; Birch, Andrew L.; Barnard, Holly R.] Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA; [Murphy, Sheila F.] US Geol Survey, Boulder, CO 80309 USA
推荐引用方式 GB/T 7714	Bukoski, Isaac S.,Murphy, Sheila F.,Birch, Andrew L.,et al. Summer runoff generation in foothill catchments of the Colorado Front Range[J]. United States Geological Survey,2021,595.
APA	Bukoski, Isaac S.,Murphy, Sheila F.,Birch, Andrew L.,&Barnard, Holly R..(2021).Summer runoff generation in foothill catchments of the Colorado Front Range.JOURNAL OF HYDROLOGY,595.
MLA	Bukoski, Isaac S.,et al."Summer runoff generation in foothill catchments of the Colorado Front Range".JOURNAL OF HYDROLOGY 595(2021).