1993 Volume 30 Pages 143-151
Probability technique for estimation of contaminant leakage points was combined with the numerical simulation technique for contaminant transportaion in the ground, to develop practical procedures for identifying the leakage point at a hypothetical municipal solid waste landfill site. The procedures were applied on the optimum monitoring wells system, which was allocated in advance of the landfill operation, to illustrate how to identify the leakage points using the additinal monitoring information after the landfill operation.
The results obtained under the limits considered can be summarized as follows;
(1) The framework to allocate additional monitoring wells for identification of contaminant leakage points can be mathematically described as the problem to find the numbers of wells and their locations which show the least expectation of an entropy of the conditional probability for identification of leakage points.
(2) The entropy of the conditional probability can be used as the index which shows how certain the identification of leakage points is. The less entropy shows the more certain identification. Zero entropy means ideal identification.
(3) Example allocations of additional monitoring wells were illustrated using possible set of monitoring information.