Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020455 |
Landform features and seasonal precipitation predict shallow groundwater influence on temperature in headwater streams | |
Johnson, Zachary C.1,2; Snyder, Craig D.1; Hitt, Nathaniel P.1 | |
2017-07-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Headwater stream responses to climate change will depend in part on groundwater-surface water exchanges. We used linear modeling techniques to partition likely effects of shallow groundwater seepage and air temperature on stream temperatures for 79 sites in nine focal watersheds using hourly air and water temperature measurements collected during summer months from 2012 to 2015 in Shenandoah National Park, Virginia, USA. Shallow groundwater effects exhibited more variation within watersheds than between them, indicating the importance of reach-scale assessments and the limited capacity to extrapolate upstream groundwater influences from downstream measurements. Boosted regression tree (BRT) models revealed intricate interactions among geomorphological landform features (stream slope, elevation, network length, contributing area, and channel confinement) and seasonal precipitation patterns (winter, spring, and summer months) that together were robust predictors of spatial and temporal variation in groundwater influence on stream temperatures. The final BRT model performed well for training data and cross-validated samples (correlation = 0.984 and 0.760, respectively). Geomorphological and precipitation predictors of groundwater influence varied in their importance between watersheds, suggesting differences in spatial and temporal controls of recharge dynamics and the depth of the groundwater source. We demonstrate an application of the final BRT model to predict groundwater effects from landform and precipitation covariates at 1075 new sites distributed at 100 m increments within focal watersheds. Our study provides a framework to estimate effects of groundwater seepage on stream temperature in unsampled locations. We discuss applications for climate change research to account for groundwater-surface water interactions when projecting future thermal thresholds for stream biota. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000407895000034 |
WOS关键词 | SUBSURFACE WATER EXCHANGE ; SHENANDOAH-NATIONAL-PARK ; COLUMBIA RIVER-BASIN ; CLIMATE-CHANGE ; THERMAL SENSITIVITY ; HYPORHEIC EXCHANGE ; RELATIVE CONTRIBUTIONS ; BIOLOGICAL CONDITION ; PACIFIC-NORTHWEST ; REGRESSION TREES |
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/20409 |
专题 | 资源环境科学 |
作者单位 | 1.US Geol Survey, Leetown Sci Ctr, Kearneysville, WV 25430 USA; 2.US EPA, Natl Hlth & Environm Effects Res Lab, Western Ecol Div, Corvallis, OR 97333 USA |
推荐引用方式 GB/T 7714 | Johnson, Zachary C.,Snyder, Craig D.,Hitt, Nathaniel P.. Landform features and seasonal precipitation predict shallow groundwater influence on temperature in headwater streams[J]. WATER RESOURCES RESEARCH,2017,53(7). |
APA | Johnson, Zachary C.,Snyder, Craig D.,&Hitt, Nathaniel P..(2017).Landform features and seasonal precipitation predict shallow groundwater influence on temperature in headwater streams.WATER RESOURCES RESEARCH,53(7). |
MLA | Johnson, Zachary C.,et al."Landform features and seasonal precipitation predict shallow groundwater influence on temperature in headwater streams".WATER RESOURCES RESEARCH 53.7(2017). |
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