Impact of peatland drainage and restoration on esker groundwater resources: modeling future scenarios for management   总被引：1，自引：0，他引：1  

Pekka M. Rossi  Pertti Ala-aho  John Doherty  Bjørn Kløve 《Hydrogeology Journal》2014,22(5):1131-1145

Esker aquifers are common groundwater bodies in Europe. Management of these aquifers should take account of the sustainability of groundwater-dependent ecosystems and land use in an integrated way. An unconfined esker aquifer in northern Finland was modelled with MODFLOW to determine how groundwater resources are impacted by the surrounding peatland drainage scheme and to simulate scenarios for possible drainage restoration. The impacts of groundwater abstraction and climate change were also simulated. A calibration-constrained Monte Carlo method was used to provide information on the uncertainties associated with model predictions. The results suggest that peatland drainage in the vicinity of eskers can have a significant role in lowering the water table, even though climate variability may mask these impacts. Drainage restoration by filling the ditches might have positive impacts on the aquifer water levels. Comparison of water-table changes caused by peatland drainage with the changes brought by water abstraction and climate variability helped to quantify impacts of different land-use scenarios and facilitated discussion with the local stakeholders. Based on this study, more attention should be devoted to peatland drainage schemes in integrated groundwater management of esker aquifers.  相似文献   

Comments on “A late Triassic 40Ar/39Ar age for the El Hammam high-REE fluorite deposit (Morocco): mineralization related to the Central Atlantic Magmatic Province?” by Cheilletz et al. (Mineralium Deposita 45:323–329, 2010)     

Mohammed Bouabdellah  David Banks  Andreas Klügel 《Mineralium Deposita》2010,45(7):729-731

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Grain size,geochemistry and organic pollutants in modern fluvial deposits in eastern Moravia (Czech Republic)     

Slavomír Nehyba  K. Hilscherová  J. Jarkovský  L. Dušek  T. Kuchovský  J. Zeman  J. Klánová  I. Holoubek 《Environmental Earth Sciences》2010,60(3):591-602

Modern fluvial deposits from both small and large rivers were studied at 14 monitoring sites over 2 years (4 successive sampling seasons) in the area of eastern Moravia (Czech Republic). Grain size, geochemistry, content of persistent organic pollutants (PAHs, PCBs, HCHs, DDTs, HCBs and PeCB) and TOC were examined with the aim to understand their mutual relations and seasonal variations in sediment character and pollutant content. Sand and silt fraction predominate and the clay content is relatively low. Differences in provenance for various river systems were recognised. Both regional and seasonal variations in terms of content of persistent organic pollutants were documented. The content of TOC and mud was shown to play an important role in the accumulation of chlorinated persistent organic pollutants PCBs, HCHs, DDTs and HCB.  相似文献