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Adapting classical water quality diagrams for ecohydrological and policy applications

Schot, P. (author), Beard, J. (author), Hissink, R. (author), Silberbauer, M. (author), Griffioen, J. (author)

Ecological values of water have gained increasing attention over the past decades in both (eco)hydrological research and water resources management. Water quality is an important ecological steering variable, and graphical water quality diagrams may aid in rapid interpretation of the hydrochemical status of a site. Traditionally used water...

article 2022

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Drivers of nitrogen and phosphorus dynamics in a groundwater-fed urban catchment revealed by high-frequency monitoring

Yu, L. (author), Rozemeijer, J.C. (author), Broers, H.P. (author), van Breukelen, B.M. (author), Middelburg, J.J. (author), Ouboter, M. (author), van der Velde, Y. (author)

article 2021

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Time integrative sampling properties of Speedisk and silicone rubber passive samplers determined by chemical analysis and in vitro bioassay testing

de Weert, J. (author), Smedes, F. (author), Beeltje, H. (author), de Zwart, D. (author), Hamers, T. (author)

article 2020

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Urban hydrogeology: Transport routes and mixing of water and solutes in a groundwater influenced urban lowland catchment

Yu, L. (author), Rozemeijer, J.C. (author), van der Velde, Y. (author), van Breukelen, B.M. (author), Ouboter, M. (author), Broers, H.P. (author)

Urban areas in coastal lowlands host a significant part of the world's population. In these areas, cities have often expanded to unfavorable locations that have to be drained or where excess rain water and groundwater need to be pumped away in order to maintain dry feet for its citizens. As a result, groundwater seepage influences surface water...

article 2019

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Measuring imperfections of water quality sensors in water distribution networks

de Winter, C. (author), Palleti, V.R. (author), Worm, D.T.H. (author), Kooij, R. (author)

Water distribution networks (WDNs) are critical to provide safe, clean drinking water around the globe. However, they are susceptible to accidental or deliberate contamination, potentially resulting in poisoned water, many fatalities and large economic consequences. In order to protect against such intrusions, an efficient sensor network should...

article 2019

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High-grade, compact spectrometers for Earth observation from SmallSats

van der Wal, L.F. (author), de Goeij, B.T.G. (author), Jansen, R. (author), Oosterling, J.A.J. (author), Snijders, B. (author)

The market for nano-and microsatellites is developing rapidly. There is a strong focus on 2D imaging of the Earth's surface, with limited possibilities to obtain spectral information. More demanding applications, such as monitoring trace gases, aerosols or water quality still require advanced imaging instruments, which are large, heavy and...

conference paper 2016

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Microbial biogeography of drinking water: Patterns in phylogenetic diversity across space and time

Roeselers, G. (author), Coolen, J. (author), van der Wielen, P.W. (author), Jaspers, M.C. (author), Atsma, A. (author), de Graaf, B. (author), Schuren, F. (author)

In this study, we collected water from different locations in 32 drinking water distribution networks in the Netherlands and analysed the spatial and temporal variation in microbial community composition by high-throughput sequencing of 16S rRNA gene amplicons. We observed that microbial community compositions of raw source and processed water...

article 2015

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Climate change impacts on the leaching of a heavy metal contamination in a small lowland catchment

Visser, A. (author), Kroes, J. (author), van Vliet, M.T.H. (author), Blenkinsop, S. (author), Fowler, H.J. (author), Broers, H.P. (author)

The Keersop catchment (43 km2) in the south of The Netherlands has been contaminated by the emissions of four zinc ore smelters. The objective of this study was to assess the effects of future projected climate change on the hydrology and the leaching of heavy metals (i.e. Cd and Zn) in the catchment. The numerical, quasi-2D, unsaturated zone...

article 2012

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Geochemical reactivity of subsurface sediments as potential buffer to anthropogenic inputs: A strategy for regional characterization in the Netherlands

van Gaans, P.F.M. (author), Griffioen, J. (author), Mol, G. (author), Klaver, G. (author)

Purpose: Sedimentary aquifers are prone to anthropogenic disturbance. Measures aimed at mitigation or adaptation require sound information on the reactivity of soil/sediments towards the infiltrating water, as this determines the chemical quality of the groundwater and receiving surface waters. Here, we address the issues of relevant sediment...

article 2011

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Strategic monitoring to account for rapid variations in the nitrate concentration of groundwater and surface water

van Geer, F. (author), Rozemeijer, J. (author), van der Velde, Y. (author), Broers, H.P. (author), de Rooij, G. (author)

As part of two PhD projects, we installed ion-selective electrodes and passive samplers for monitoring nitrate concentrations in a 7 km 2 catchment and compared the results to grab samples. We also monitored nitrate concentrations at the catchment outlet. We tested the effectiveness of these monitoring approaches to estimate the long-term...

conference paper 2011

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River flooding and landscape changes impact ecological conditions of a scour hole lake in the Rhine-Meuse delta, The Netherlands

Cremer, H. (author), Bunnik, F.P.M. (author), Donders, T.H. (author), Hoek, W.Z. (author), Koolen-Eekhout, M. (author), Koolmees, H.H. (author), Lavooi, E. (author), TNO Bouw en Ondergrond (author)

A 400-year sediment record from an 18 m deep scour hole lake (Haarsteegse Wiel) near the Meuse River in the Netherlands was investigated for past changes in water quality, flooding frequency and landscape change using geophysical, geochemical and micropaleontological information. The results are highly significant for determining long-term...

article 2010

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Denitrification coupled to pyrite oxidation and changes in groundwater quality in a shallow sandy aquifer

Zhang, Y.-C. (author), Slomp, C.P. (author), Broers, H.P. (author), Passier, H.F. (author), van Cappellen, P. (author), TNO Bouw en Ondergrond (author)

This study focuses on denitrification in a sandy aquifer using geochemical analyses of both sediment and groundwater, combined with groundwater age dating (³H/³He). The study sites are located underneath cultivated fields and an adjacent forested area at Oostrum, The Netherlands. Shallow groundwater in the region has high...

article 2009

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Comparison of selection methods to deduce natural background levels for groundwater units

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

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Geochemistry and flooding as determining factors of plant species composition in Dutch winter-flooded riverine grasslands

Beumer, V. (author), van Wirdum, G. (author), Beltman, B. (author), Griffioen, J. (author), Grootjans, A.P. (author), Verhoeven, J.T.A. (author), TNO Bouw en Ondergrond (author)

Dutch water policy aims for more frequent, controlled flooding of river valley floodplains to avoid unwanted flooding elsewhere; in anticipation of increased flooding risks resulting from climate changes. Controlled flooding usually takes place in winter in parts of the valleys which had not been subject to flooding in the last decades. It may...

article 2008

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Using a groundwater quality negotiation support system to change land-use management near a drinking-water abstraction in the Netherlands

van den Brink, C. (author), Zaadnoordijk, W.J. (author), van der Grift, B. (author), de Ruiter, P.C. (author), Griffioen, J. (author), TNO Bouw en Ondergrond (author)

A negotiation support system (NSS) was developed to solve groundwater conflicts that arose during land-use management. It was set up in cooperation with the stakeholders involved to provide information on the impact of land use, e.g., agriculture, nature (forested areas), recreation, and urban areas, on the quality of both infiltrating and...

article 2008

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Stochastic uncertainties and sensitivities of a regional-scale transport model of nitrate in groundwater

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

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Groundwater chemistry of Al under Dutch sandy soils: Effects of land use and depth

Fest, E.P.M.J. (author), Temminghoff, E.J.M. (author), Griffioen, J. (author), van der Grift, B. (author), van Riemsdijk, W.H. (author), TNO Bouw en Ondergrond (author)

Aluminium has received great attention in the second half of the 20th century, mainly in the context of the acid rain problem mostly in forest soils. In this research the effect of land use and depth of the groundwater on Al, pH and DOC concentration in groundwater under Dutch sandy soils has been studied. Both pH and DOC concentration play a...

article 2007

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Brake wear from vehicles as an important source of diffuse copper pollution

Hulskotte, J.H.J. (author), van der Gon, H.A.C.D. (author), Visschedijk, A.J.H. (author), Schaap, M. (author), TNO Bouw en Ondergrond (author)

In this article we show that brake wear from road traffic vehicles is an important source of atmospheric (participate) copper concentrations in Europe. Consequently, brake wear also contributes significantly to deposition fluxes of copper to surface waters. We estimated the copper emission due to brake wear to be 2.4 kiloton per year. For...

conference paper 2007

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Statistical analysis of anthropogenic versus geochemical-controlled differences in groundwater composition in The Netherlands

van den Brink, C. (author), Frapporti, G. (author), Griffioen, J. (author), Zaadnoordijk, W.J. (author), TNO Bouw en Ondergrond (author)

Quantitative insight into the impact of land use on groundwater composition is vital for the sustainable management of aquifers, especially those situated in urban areas. The objective of the present study was to determine the effects of land use on groundwater composition throughout the Netherlands, relative to the influence of groundwater age,...

article 2007

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Demonstrating trend reversal of groundwater quality in relation to time of recharge determined by 3H/3He

Visser, A. (author), Broers, H.P. (author), van der Grift, B. (author), Bierkens, M.F.P. (author), TNO Bouw en Ondergrond (author)

Recent EU legislation is directed to reverse the upward trends in the concentrations of agricultural pollutants in groundwater. However, uncertainty of the groundwater travel time towards the screens of the groundwater quality monitoring networks complicates the demonstration of trend reversal. We investigated whether trend reversal can be...

article 2007