Water resources is one of the most important national re-
sources. A proper management and planning can increase the
function of substainable uses. In this study, a personal com-
puter network was used as a tool to develop a program on de-
mand , supply , and allocation of water resources management
model ( called Water Resources Management Simulation, WARMS ).
It is used to simulate water demand , allocation, shortage ,
and reservoir storage in different timesteps . This tool is
designed to manage and operate water resources effectively .
Since water resources data exhibit spatial and temporal char-
acteristics, decision makers need special information to aid
decision making in different scenarios. In the past, most
models were lack of counting for both spatial and temporal
characteristics simultaneously. In this paper, a geographic
information system (GIS), decision supp- ort system and WARMS
were integrated and applied to analyze Tanshui and Kaoping
River Basins separately. The simulation analysis results were
then integrated with GIS inquiring sy- stem , graphic system
and expert system to form a macro decision support system .
Users are available to use this model for simulation, GIS for
inquiry, graphics for display and expert system for
knowledge base . Results from this decision support system will
aid users in water resources related decision making.