SIMULATION STUDY OF A HYDROSTAT DESIGN FOR DETECTING UNDERGROUND LEAKAGE OF WATER-SUPPLY USING NEUTRON BACKSCATTERING

We have embarked upon the development of a new detection method for un derground water leakage using a neutron backscattering system. We have estimated the performance capabilities of such a system using Monte C arlo simulation. It is indicated that a leak which results in 40% wate r content in the surrounding soils could be detected at depths of up t o 40 cm from the surface to the center of the source of leakage. This new detection system could be useful as a hydrostat of underground wat er supply in noisy areas such as Tokyo, in place of presently-used hyd rostats which are based on detection of changes in sound. (C) 1998 Els evier Science Ltd. All rights reserved.