Abstract
Abstract Spatially dependent phenomena related to heavy metal concentration in a drainage system have been evaluated using GIS methodology, so providing an indication of areas which may contain contaminated land. The geochemical distribution is used to identify the heavy metal sources. The GIS facilitates dispersion modelling defined by a digital elevation model. This can be used to delineate drainage catchments and to examine its interaction with stream sediment geochemistry. The resulting drainage basin-segment images can then be used to identify heavy metal sources. Such modelling of geochemical dispersion of metals within drainage basins allows predictions to be made as to which areas of contamination originate from which point source. The accuracy of such maps depends fundamentally on the accuracy of the dispersion model. This model includes both descriptive and deductive components concerning the influential criteria for describing the distribution of heavy metals. Each criterion is defined using an interactive discussion process that leads to the generation of a set of weighting coefficients. The integration of such criteria is achieved using fuzzy set methodology to produce images ranked according to how well they meet the selected site assessment criteria.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Geological Society, London, Engineering Geology Special Publications
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
