Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR022842 |
On the Sensitivity of Hillslope Runoff and Channel Transmission Losses in Arid Piedmont Slopes | |
Schreiner-McGraw, Adam P.1; Vivoni, Enrique R.1,2 | |
2018-07-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:7页码:4498-4518 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Channel transmission losses alter the streamflow response of arid and semiarid watersheds and promote focused groundwater recharge. This process has been primarily studied in dryland channels draining large areas that are displaced away from hillslope runoff generation. In contrast, small watersheds on arid piedmont slopes allow the investigation of interactive hillslope and channel processes that control the partitioning between surface and subsurface flows. In this study, we utilize high-resolution, long-term measurements of water balance components in an instrumented watershed of the Chihuahuan Desert to set up, parameterize, and test a process-based, distributed hydrologic model modified to account for channel losses. A transient method for capturing capillary effects in channels results in simulations with a reliable representation of the watershed energy balance, soil moisture dynamics, hillslope infiltration, channel transmission (or percolation) losses, and streamflow yield over the study period. The simulation also reproduces a conceptual model of hillslope infiltration-excess runoff generation linked to downstream channel percolation losses that depend on the rainfall event size. Model-derived thresholds were obtained for the amount of hillslope runoff (6 mm) and rainfall (12.5 mm) necessary for streamflow yield, such that 40% of percolation occurs for small events that do not reach the outlet. Using a set of scenarios, we identify that hillslope infiltration controls the rainfall threshold necessary to initiate percolation, while channel infiltration affects the partitioning into percolation and streamflow yield. Thus, the connectivity along hillslope-channel pathways is deemed an essential control on the streamflow generation and groundwater recharge in arid regions with complex terrain. |
英文关键词 | dryland ecohydrology groundwater recharge distributed hydrologic modeling hillslope-channel systems hydrologic connectivity infiltration losses |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442502100019 |
WOS关键词 | 2 SEMIARID ECOSYSTEMS ; HYDROLOGIC CONDITIONS ; GROUNDWATER RECHARGE ; CHIHUAHUAN DESERT ; DISTRIBUTED MODEL ; JORNADA BASIN ; WATER-BALANCE ; OVERLAND-FLOW ; MOJAVE DESERT ; INFILTRATION |
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/21981 |
专题 | 资源环境科学 |
作者单位 | 1.Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85281 USA; 2.Arizona State Univ, Sch Sustainable Engn & Built Environm, Tempe, AZ 85281 USA |
推荐引用方式 GB/T 7714 | Schreiner-McGraw, Adam P.,Vivoni, Enrique R.. On the Sensitivity of Hillslope Runoff and Channel Transmission Losses in Arid Piedmont Slopes[J]. WATER RESOURCES RESEARCH,2018,54(7):4498-4518. |
APA | Schreiner-McGraw, Adam P.,&Vivoni, Enrique R..(2018).On the Sensitivity of Hillslope Runoff and Channel Transmission Losses in Arid Piedmont Slopes.WATER RESOURCES RESEARCH,54(7),4498-4518. |
MLA | Schreiner-McGraw, Adam P.,et al."On the Sensitivity of Hillslope Runoff and Channel Transmission Losses in Arid Piedmont Slopes".WATER RESOURCES RESEARCH 54.7(2018):4498-4518. |
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