Possible effects of climate change on hydrogeological systems: results from research on esker aquifers in northern Finland

摘要: Eskers are important aquifers in Fenno-Scandia and many other Northern regions where the crystalline bedrock is covered by glaciofluvial sand and gravel deposits. Esker ridges stretches in the direction of past ice melt. In coastal regions eskers are covered by marine deposits. Inland systems have unconfined recharge areas and sometimes confined discharge areas. Eskers are often connected to important ecosystems such as lakes, rivers, springs and peatlands. Kettle lakes are located within the esker and are usually groundwater-dependent. In Finland, groundwater in eskers is threatened by peatland drainage, roads and other landuses. In this paper we review previous results on climate change in Finland, present results from our previous studies on eskers and discuss the impacts of climate change and land-use in eskers. Climate models predict an increase in precipitation but this is uncertain. Analysis of …