Book Description

This report presents an analysis of five types of water supply alternative plans for public water use on Guam. These include (1) northern lens aquifer plus military sources; (2) northern lens aquifer only; (3) northern lens aquifer plus southeastern river; (4) southeastern river development only, and (5) southeastern river development plus military sources. There are two parts to the report. The first part, Water Distribution System Analysis, presents the results of a water balance for the five types of alternatives under three water use projections, and documents the collection of data and development and calibration of the MAPS(Methodology for Areawide Planning Studies) water distribution system for Guam. In the second part, Economic Analysis of Alternatives, conceptual designs are presented for each type of alternative for three water use projections. These designs include source, treatment, and major distribution facilities. In general, alternatives relying on the northern lens aquifer were less expensive because of the large capital cost associated with large dams. The large dams with centralized treatment should produce better quality water. Use of several types of sources should reduce the stresses on the northern lens aquifer.