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DOI | 10.5194/hess-22-4295-2018 |
The influence of diurnal snowmelt and transpiration on hillslope throughflow and stream response | |
Woelber B.; Maneta M.P.; Harper J.; Jencso K.G.; Payton Gardner W.; Wilcox A.C.; López-Moreno I. | |
发表日期 | 2018 |
ISSN | 1027-5606 |
起始页码 | 4295 |
结束页码 | 4310 |
卷号 | 22期号:8 |
英文摘要 | During spring, daily stream flow and groundwater dynamics in forested subalpine catchments are to a large extent controlled by hydrological processes that respond to the day-night energy cycle. Diurnal snowmelt and transpiration events combine to induce pressure variations in the soil water storage that are propagated to the stream. In headwater catchments these pressure variations can account for a significant amount of the total pressure in the system and control the magnitude, duration, and timing of stream inflow pulses at daily scales, especially in low-flow systems. Changes in the radiative balance at the top of the snowpack can alter the diurnal hydrologic dynamics of the hillslope-stream system, with potential ecological and management consequences. We present a detailed hourly dataset of atmospheric, hillslope, and streamflow measurements collected during one melt season from a semi-alpine headwater catchment in western Montana, US. We use this dataset to investigate the timing, pattern, and linkages among snowmelt-dominated hydrologic processes and assess the role of the snowpack, transpiration, and hillslopes in mediating daily movements of water from the top of the snowpack to local stream systems. We found that the amount of snowpack cold content accumulated during the night, which must be overcome every morning before snowmelt resumes, delayed water recharge inputs by up to 3 h early in the melt season. These delays were further exacerbated by multi-day storms (cold fronts), which resulted in significant depletions in the soil and stream storages. We also found that both diurnal snowmelt and transpiration signals are present in the diurnal soil and stream storage fluctuations, although the individual contributions of these processes are difficult to discern. Our analysis showed that the hydrologic response of the snow-hillslope-stream system is highly sensitive to atmospheric drivers at hourly scales and that variations in atmospheric energy inputs or other stresses are quickly transmitted and alter the intensity, duration, and timing of snowmelt pulses and soil water extractions by vegetation, which ultimately drive variations in soil and stream water pressures. . © Author(s) 2018. |
语种 | 英语 |
scopus关键词 | Catchments; Groundwater; Process control; Runoff; Snow melting systems; Soil moisture; Stream flow; Transpiration; Atmospheric energy; Groundwater dynamics; Headwater catchment; Hydrologic response; Hydrological process; Pressure variations; Soil water extractions; Streamflow measurements; Rivers; catchment; groundwater; headwater; hillslope; hydrological response; low flow; snowmelt; snowpack; soil water; streamflow; subalpine environment; throughflow; transpiration; vegetation cover; water storage; Montana; United States |
来源期刊 | Hydrology and Earth System Sciences |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/159943 |
作者单位 | Woelber, B., Geosciences Department, University of Montana, Missoula, MT, United States; Maneta, M.P., Geosciences Department, University of Montana, Missoula, MT, United States; Harper, J., Geosciences Department, University of Montana, Missoula, MT, United States; Jencso, K.G., W. A. Franke College of Forestry and Conservation, University of Montana, Missoula, MT, United States; Payton Gardner, W., Geosciences Department, University of Montana, Missoula, MT, United States; Wilcox, A.C., Geosciences Department, University of Montana, Missoula, MT, United States; López-Moreno, I., Dpt. Procesos Geoambientales y Cambio Global, Pyrenean Institute of Ecology, C.S.I.C. Zaragoza, Zaragoza, Spain |
推荐引用方式 GB/T 7714 | Woelber B.,Maneta M.P.,Harper J.,et al. The influence of diurnal snowmelt and transpiration on hillslope throughflow and stream response[J],2018,22(8). |
APA | Woelber B..,Maneta M.P..,Harper J..,Jencso K.G..,Payton Gardner W..,...&López-Moreno I..(2018).The influence of diurnal snowmelt and transpiration on hillslope throughflow and stream response.Hydrology and Earth System Sciences,22(8). |
MLA | Woelber B.,et al."The influence of diurnal snowmelt and transpiration on hillslope throughflow and stream response".Hydrology and Earth System Sciences 22.8(2018). |
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