GSTDTAP  > 资源环境科学
DOI10.1029/2018WR024652
Wetland Connectivity Thresholds and Flow Dynamics From Stage Measurements
McLaughlin, Daniel L.1; Diamond, Jacob S.1; Quintero, Carlos2; Heffernan, James3; Cohen, Matthew J.4
2019-07-01
发表期刊WATER RESOURCES RESEARCH
ISSN0043-1397
EISSN1944-7973
出版年2019
卷号55期号:7页码:6018-6032
文章类型Article
语种英语
国家USA
英文摘要

Depressional wetlands are dominant features in many low-gradient landscapes, where they provide water storage and exchange. Typical basin morphology enables water storage during drier periods, when surface flow paths are disconnected and exchange is limited to slower groundwater flow paths. Under wetter conditions, wetland stage can exceed surface connection thresholds, activating surface flow paths to downstream waters. Empirical methods are needed to quantify these dynamics and thus to assess their role in landscape hydrology and associated functions. We developed a new water budget-based approach to enumerate connectivity thresholds and flows from stage measurements. We propose that this approach, termed Connectivity and Flow from Stage (CFS), has broad applicability across wetlandscapes. We applied the CFS method in the Big Cypress National Preserve, where we hypothesized that surface connectivity episodes control water and solute flux, with consequences for exported carbonate weathering products and thus for karst landform evolution. Across five study wetlands, this analysis detected surface connectivity thresholds and assessed temporal flow dynamics. Imputed connectivity thresholds were clear from stage-dependent net flow dynamics and aligned well with LiDAR-derived thresholds. Water export occurred overwhelmingly when stage exceeded these thresholds, indicating that water and solute export from these wetlands is dominated by periods of enhanced landscape connectivity. Notably, the presented CFS method can quantify wetland connectivity thresholds from stage data, even without supporting geomorphic information. This approach is useful for understanding hydrologic controls on biogeomorphic evolution in this particular karst landscape, and more broadly for inferring wetland connectivity patterns and magnitudes in other wetlandscape settings.


领域资源环境
收录类别SCI-E
WOS记录号WOS:000481444700047
WOS关键词GEOGRAPHICALLY ISOLATED WETLANDS ; SURFACE-WATER ; HYDROLOGIC CONNECTIVITY ; STREAMS ; SEEPAGE ; STORAGE ; SHIFTS ; LAKES
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/184868
专题资源环境科学
作者单位1.Virginia Tech, Dept Forest Resources & Environm Conservat, Blacksburg, VA 24061 USA;
2.Univ Florida, Soil & Water Sci Dept, Gainesville, FL USA;
3.Duke Univ, Nicholas Sch Environm, Durham, NC USA;
4.Univ Florida, Sch Forest Resources & Conservat, Gainesville, FL USA
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GB/T 7714
McLaughlin, Daniel L.,Diamond, Jacob S.,Quintero, Carlos,et al. Wetland Connectivity Thresholds and Flow Dynamics From Stage Measurements[J]. WATER RESOURCES RESEARCH,2019,55(7):6018-6032.
APA McLaughlin, Daniel L.,Diamond, Jacob S.,Quintero, Carlos,Heffernan, James,&Cohen, Matthew J..(2019).Wetland Connectivity Thresholds and Flow Dynamics From Stage Measurements.WATER RESOURCES RESEARCH,55(7),6018-6032.
MLA McLaughlin, Daniel L.,et al."Wetland Connectivity Thresholds and Flow Dynamics From Stage Measurements".WATER RESOURCES RESEARCH 55.7(2019):6018-6032.
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