Searched for: subject%3A%22Underground%255C%2Breservoirs%22
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document
Visser, A. (author), Schaap, J.D. (author), Broers, H.P. (author), Bierkens, M.F.P. (author), TNO Bouw en Ondergrond (author)
The production of N2 gas by denitrification may lead to the appearance of a gas phase below the water table prohibiting the conservative transport of tracer gases required for groundwater dating. We used a two-phase flow and transport model (STOMP) to study the reliability of 3H/3He, CFCs and SF6 as groundwater age tracers under agricultural...
article 2009
document
Visser, A. (author), Schaap, J.D. (author), Leijnse, T. (author), Broers, H.P. (author), Bierkens, M.F.P. (author), TNO Bouw en Ondergrond (author)
Degassing of groundwater by excess denitrification of agricultural pollution complicates the interpretation of 3H/3He data and hinders the estimation of travel times in nitrate pollution studies. In this study we used a two-phase flow and transport model (STOMP) to evaluate the method presented by Visser (2007a) to interpret degassed 3H/ 3He...
conference paper 2008
document
Griffioen, J. (author), Passier, H.F. (author), Klein, J. (author), TNO Bouw en Ondergrond (author)
Establishment of natural background levels (NBL) for groundwater is commonly performed to serve as reference when assessing the contamination status of groundwater units. We compare various selection methods to establish NBLs using groundwater quality data forfour hydrogeologically different areas in the highly populated and developed...
article 2008
document
Brink, C.v.d. (author), Zaadnoordijk, W.J. (author), Burgers, S. (author), Griffioen, J. (author), TNO Bouw en Ondergrond (author)
Groundwater quality management relies more and more on models in recent years. These models are used to predict the risk of groundwater contamination for various land uses. This paper presents an assessment of uncertainties and sensitivities to input parameters for a regional model. The model had been set up to improve and facilitate the...
article 2008
document
van Geer, F. (author), Marsman, A. (author), Janssen, G.M.C.M. (author), TNO Bouw en Ondergrond (author)
Usually the design of the monitoring system is based on the relation between the monitoring effort and the uncertainty of the information. Often the estimation error standard deviation is used as a criterion for the design. Despite the fact that, for scientists, the standard deviation as a measure of uncertainty is a logical criterion, water...
conference paper 2007
Searched for: subject%3A%22Underground%255C%2Breservoirs%22
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