Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR024937 |
Impacts of Groundwater Drainage on Pentland Subsidence and Its Ecological Implications on an Atlantic Raised Bog | |
Regan, S.1; Flynn, R.2; Gill, L.1; Naughton, O.3; Johnston, P.1 | |
2019-07-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:7页码:6153-6168 |
文章类型 | Article |
语种 | 英语 |
国家 | Ireland; North Ireland |
英文摘要 | Field data of topography, water levels, and peat hydraulic conductivity collected over a 28-year period have revealed the impacts of marginal drainage on uncut raised bog ecohydrology and its peat properties. Drainage of the regional groundwater body has induced changes in the hydraulic properties of deep peat, with peat compression decreasing hydraulic conductivity and storativity while simultaneously introducing localized secondary porosity and effective storage. Where peat has increased in hydraulic conductivity, there is a corresponding decline in vertical hydraulic gradients and significant localized increases in recharge to the underlying substrate. Repeated topographic surveys show intense localized areas of peat consolidation (>5%) where it is underlain by highly permeable (>10 m/day) glacial till deposits. More widely, continued subsidence (4-6 mm/year) of the bog surface has been measured over 900 m from the bog margin, resulting in the progressive loss of approximately 40% of actively growing raised bog since 1991. This loss has thus been shown to be attributable to changes in the underlying groundwater head due to deep-cut drainage, rather than near-surface peatland drainage. However, although reinstating regional hydrostatic pressures in order to restore this ombrotrophic peatland may control the rapid drainage through preferential flow pathways, this may not eliminate the ecological impacts resulting from changed surface morphology arising from subsidence. Hence, this longitudinal study provides new insights into the role that aquifer systems and groundwater bodies play in maintaining hydrogeological processes in ombrotrophic peatland systems, while highlighting the difficulty in ecological restoration where regional groundwater dependencies are significant. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481444700055 |
WOS关键词 | HYDRAULIC CONDUCTIVITY ; PEAT ; PEATLANDS ; FLOW ; WATER ; HYDROLOGY ; CLIMATE ; TRANSPORT ; SIZE |
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/184876 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Dublin Trinity Coll, Dept Civil Struct & Environm Engn, Dublin, Ireland; 2.Queens Univ Belfast, Sch Nat & Built Environm, Belfast, Antrim, North Ireland; 3.Geol Survey Ireland, Dublin, Ireland |
推荐引用方式 GB/T 7714 | Regan, S.,Flynn, R.,Gill, L.,et al. Impacts of Groundwater Drainage on Pentland Subsidence and Its Ecological Implications on an Atlantic Raised Bog[J]. WATER RESOURCES RESEARCH,2019,55(7):6153-6168. |
APA | Regan, S.,Flynn, R.,Gill, L.,Naughton, O.,&Johnston, P..(2019).Impacts of Groundwater Drainage on Pentland Subsidence and Its Ecological Implications on an Atlantic Raised Bog.WATER RESOURCES RESEARCH,55(7),6153-6168. |
MLA | Regan, S.,et al."Impacts of Groundwater Drainage on Pentland Subsidence and Its Ecological Implications on an Atlantic Raised Bog".WATER RESOURCES RESEARCH 55.7(2019):6153-6168. |
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