Leaching of plant protection products and their transformation products : proposals for improving the assessment of leaching to groundwater in the Netherlands

J.J.T.I. Boesten, A.M.A. van der Linden, W.H.J. Beltman, J.W. Pol

Research output: Book/ReportReportProfessional

Abstract

Assessment of leaching of plant protection products to groundwater is an important aspect of the environmental risk assessment of these substances. Analysis of available Dutch groundwater monitoring data for these substances triggered a critical review of the current Dutch leaching assessment. As a result, proposals were developed for improving this assessment. These include: (i) a procedure for correcting systematic errors in measured sorption coefficients, (ii) a preliminary procedure for a quality check of Freundlich exponents, (iii) a flow chart for obtaining parameters describing the relationship between the organic-matter/water distribution coefficient, Kom, and the pH for weak acids, (iv) a procedure for obtaining an average Kom from a population of Kom values including lower and upper limits, (v) a procedure for estimating the total amount of substance in soil from a concentration profile (needed for assessment of degradation half-lives from field experiments). We recommend to test the feasibility of proposals to a few dossiers before implementing them in the leaching assesssment.
Original languageEnglish
Place of PublicationWageningen
PublisherAlterra
Publication statusPublished - 2011

Publication series

NameAlterra-rapport
PublisherAlterra
No.2264
ISSN (Print)1566-7197

Keywords

  • soil chemistry
  • pesticides
  • leaching
  • soil pollution
  • groundwater pollution
  • monitoring

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