10 ref.

This paper reports on the results of a research study funded by the US. Geological Survey, Water Institute Program through the University of Guam Water and Energy Research Institute of the Western Pacific (WERI). The purpose of this project was to develop and disseminate criteria to be used in the design of new or refurbishing of existing individual water supply systems of various islands in the Federated States of Micronesia (F.S.M.). The end product was a set of design criteria for sizing combined rooftop rain catchment systems. (RRCS)/groundwater systems so that these systems can provide a continuous water supply even during drought conditions. A windows based computer simulation model called ROOFRAIN was developed to evaluate the effectiveness of various RRCS configurations for varied use rates. An inventory of use rates, catchment sizes, and tank configurations was made for various island groups in the Federated States of Micronesia. This information was used to update and verify past studies which have been made concerning water consumption un Micronesia. Rainfall data and water use rates served as input to the RRCS model. Output from the model was used to develop a set of design tables to be used by island sanitarians and residents in planning the design of new or the upgrading of existing RRCS systems. A brochurecontaining these tables has been printed and is being distributed to island residents in the Federated States of Micronesia. (MV)