Abstract
An environmental risk assessment, uncommon since focusing only on the pollution risk of soil and groundwater through pesticides, for a site in the Mid-Hills of Nepal will be introduced and discussed.
It will be shown, that model fits which have been developed for the three compounds Metalaxyl, Dimethoate and Fenvalerate, show satisfying results for the further application on risk assessment for the first two, as they account for the general trend of the transport mechanism. For the latter one, the applied model failed due to unidentified transport and degradation processes. Furthermore, the assessment profiles show phenomena in the data which cannot be explained with the applied model, i.e. higher concentrations of pesticides in greater depths than in medium depths. Field studies conducted as combined tracing experiments with the respective pesticides and Vitasin Blue FCF 90 and Deuterium (as a conservative tracer) are used to investigate these phenomena. Results show a leading role of preferential flow paths and free soil water in the transport of pesticides into the deeper soil and into the groundwater system under the given agricultural system (ponding and furrow irrigation), climate and soil type. These additional field studies were necessary in order to reach a sound environmental risk assessment.
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References
Apel, H. (2002) Risk Assessment of Pesticides in the Mid-Hills of Nepal: Environmental Fate and Population Dynamics Modelling, Landschaftsökologie und Umweltforschung 41, Braunschweig.
CEAPRED (2000) Socioeconomic survey of the Jhikhu-Khola watershed. Unpublished report, CEAPRED, Kathmandu.
EXTOXNET (2001) The Extension Toxicology Network, University of California-Davis, Oregon State University, Michigan State University, Cornell University, University of Idaho. URL: http://ace.orst.edu/info/ectoxnet.
Herrmann, A. and Schumann, S. (eds.) (2001) International Workshop on Environmental Risk Assessment of Pesticides and Integrated Pesticide Management in Develo** Countries. Proceedings. Kathmandu 6–9 November 2001, Landschaftsökologie und Umweltforschung 38, Braunschweig.
Schumann, S. (2002) Fast estimation of pesticide risk potential on groundwater through the use of a dye tracing technique, in Herrmann, A. and Schumann, S. (eds.) (2001) International Workshop on Environmental Risk Assessment of pesticides and Integrated Pesticide Management in Develo** Countries. Proceedings. Kathmandu 6–9 November 2001, Landschaftsökologie und Umweltforschung 38, Braunschweig, 178–189.
Schumann, S., Stichler, W. and Prajapati, S.B. (2002) Underground water passages and runoff formation pattern in an irrigated khet catchment, in Herrmann, A. and Schumann, S. (eds.) (2001) International Workshop on Environmental Risk Assessment of pesticides and Integrated Pesticide Management in Develo** Countries. Proceedings. Kathmandu 6–9 November 2001, Landschaftsökologie und Umweltforschung 38, Braunschweig, 190–204.
Schumann, S., Langenberg F., Vinke, C., Kreuzig, R., and Bahadir M. (2002) Zur Identifizierung präferentieller Fließwege für den Pestizid-Transport in Böden mittels Farbtracer-Einsatz. Unpublished poster GDCh Meeting 2002, Braunschweig.
Vinke, C. (2003) Zum Rückstandsverhalten von Pflanzenschutzmitteln in Böden aus dem Jhikku Khola-Gebiet/Nepal, Landschaftsökologie und Umweltforschung 42, Braunschweig.
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Schumann, S. (2004). Environmental Risk Assessment of Pesticides in Nepal and Hindukush-Himalayan Region. In: Linkov, I., Ramadan, A.B. (eds) Comparative Risk Assessment and Environmental Decision Making. Nato Science Series: IV: Earth and Environmental Sciences, vol 38. Springer, Dordrecht. https://doi.org/10.1007/1-4020-2243-3_5
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DOI: https://doi.org/10.1007/1-4020-2243-3_5
Publisher Name: Springer, Dordrecht
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