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On wellhead protection assessment methods: a case
study in Montemor-o-Novo, Portugal
MARIA JOĆO
MOINANTE & JOĆO PAULO LOBO-FERREIRA
Laboratório Nacional de Engenharia Civil (LNEC), Hydraulics and Environment Department (DHA), Groundwater Division (NAS), Av. do Brasil, 101, 1700-066 Lisboa, Portugal
mjmoinante@lnec.pt
Abstract Groundwater is vulnerable to several kinds of pollution usually related to the development of anthropogenic activities. Nowadays, wellhead protection areas and their associated restrictions are the most widely used instruments for protecting aquifers. After the description of the wellhead protection area and the presentation of Portuguese regulations that govern wellhead protection areas, a review of the methods applied to define wellhead protection areas in the case study is presented. The study area is briefly described, including the wells used for public water supply, and analytical methods for wellhead protection zone definition are applied, including the method suggested by the Portuguese legislation and the ASMWIN numerical model. Finally, some conclusions are made, based on the results achieved.
Key
words analytical
method; aquifer protection; groundwater; numerical modelling; pollution;
stochastic modelling