The Dynamics of Groundwater Chemistry in Unconsolidated Aquifers: the Salland Section
- 作者：Vissers ; M. J. M. ; Frapporti ; G. ; Vriend ; S. P. ; Hoogendoorn ; J. H.
- 刊名：Physics and Chemistry of the Earth ; Part B ; Hydrology ; Oceans and Atmosphere
- 出版年：1999
- 期刊代码：71_14641909
- 类别：ear
- 出版时间：1999
- 卷：24
- 期：6
- 页码：529-534
- 文件大小：394 K
摘要
Hydrological models alone can be ambiguous in the determination of flowpatterns and groundwater ages. Their use is thus somewhat limited in the study of controls and spatial distribution of groundwater compositions. Multilevel wells can be useful for the understanding of local groundwater flow and for model verification. The dynamics of groundwater chemistry over a period of seven years is studied in a section of multilevel wells in an unconsolidated aquifer in the eastern part of the Netherlands. From chemistry-depth profiles important information concerning hydrological systems, age of the water and local flow direction (seepage or infiltration) is deduced. The new concept of systemfunnels, funnel-shaped ground water volumes that originate from geochemically homogeneous areas, provide a framework for the description of the dynamics of groundwater chemistry. Short-term predictions of water chemistry trends are made and boundaries between local and regional groundwater flow systems are identified. Chemical variations along the flowpath are related to the hydrochemical changes in the last two centuries in the recharge areas. The development history of a region is thus an essential factor in the evolution of the groundwater chemistry.