Print Email Facebook Twitter Strategic monitoring to account for rapid variations in the nitrate concentration of groundwater and surface water Title Strategic monitoring to account for rapid variations in the nitrate concentration of groundwater and surface water Author van Geer, F. Rozemeijer, J. van der Velde, Y. Broers, H.P. de Rooij, G. Publication year 2011 Abstract 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 pattern in concentrations and loads at the catchment outlet. In addition, we built a regression model to predict the short-term variations in nitrate concentration. We used commonly available measurements of precipitation, discharge and groundwater head as explanatory variables. In this paper we present a comparison of different approaches to monitoring, and we discuss the potential of the ion-selective electrodes and passive samplers for practical nitrate monitoring. Copyright © 2011 IAHS Press. Subject Earth & EnvironmentGM - GeomodellingEELS - Earth, Environmental and Life SciencesGeological Survey NetherlandsGeosciencesEnergy / Geological Survey NetherlandsCatchment hydrologyGroundwater protectionIon-selective electrodesNitrate monitoring strategiesNutrient leachingNutrient loadsPassive samplingWater quality To reference this document use: http://resolver.tudelft.nl/uuid:bf38922e-8374-435f-8cdd-a699529de0ac TNO identifier 460479 ISBN 01447815 Source Symposium H01 on Conceptual and Modelling Studies of Integrated Groundwater, Surface Water, and Ecological Systems, Held During the 25th General Assembly of the International Union of Geodesy and Geophysics, IUGG 2011, 28 June 2011 through 7 July 2011, Melbourne, VIC, 345, 194-199 Series IAHS-AISH Publication Document type conference paper Files To receive the publication files, please send an e-mail request to TNO Library.