Abstract
The paper is a study on the drainage system of the Bayon temple. The authors attempt to identify and distinguish each drain by its purpose, physical feature and function as well as to analyze how present malfunction of these drains are contributing to the deterioration of the temple building. As a result of document research and series of field surveys, drains in the Bayon could be categorized largely into two types by their purposes. One would be the drains that function as to evacuate rainwater from its center outwards; and the other drains are found to be added in the course of building renovation for the purpose of ameliorating previously existed drains. It is interesting that the drainage system is found to be unique and possibly be quite an imaginative traditional approach to drain excessive precipitation. However it is evident that the present malfunction of the system is contributing to further decay of the physical appearance of the building.
