CONSERVATION OF WATER AND PROTECTION OF WATER RESOURCES IS CONSIDERED AS AN IMPORTANT AND FUNDAMENTAL ELEMENT IN SUSTAINABLE DEVELOPMENT. IN THE SOUTHERN REGIONS OF OUR COUNTRY, ACCESS TO FRESH WATER IS WITH GREAT DIFFICULTY AND ITS SUPPLY IS VERY COSTLY. ON THE ISLANDS BECAUSE OF THE PHYSICAL LOCATION, ISOLATION, HIGH POPULATION DENSITY, SCARCE NATURAL RESOURCES SUCH AS LAND, WATER, MINERALS AND ENERGY, AND EXPOSURE TO NATURAL DISASTERS, HURRICANES, TIDAL WAVES AND OTHERS, WE HAVE SPECIAL PROBLEMS. [8]IN KISH ISLAND WITH AN AREA OF APPROXIMATELY 9000 HA, INTEGRATED WATER RESOURCE MANAGEMENT (IWRM) IS VERY IMPORTANT IN TERMS OF WATER SUPPLY AND THE ENVIRONMENT AND THE NATURAL ECOSYSTEM. DUE TO THE CONFINED AND LIMITED WATER RESOURCES AVAILABLE, AND REDUCING ITS PER CAPITA, IWRM WILL BECOME MORE IMPORTANT. IN THIS REGARD, THE ISLAND'S WATER RESOURCES (CONVENTIONAL AND UNCONVENTIONAL) NEED TO BE ANALYZED. WATER SYSTEMS CAN BE MODELED USING APPROPRIATE MEASURES AND REQUIRED PREDICTIONS AND THE RESPONSE OF THE SYSTEM TO BE SIMULATED.IN THIS RESEARCH, THE WATER RESOURCES AVAILABLE AND USABLE IN THE ISLAND, INCLUDING SURFACE WATER, GROUNDWATER, THE AMOUNT OF PRODUCED WATER DESALINATION, WASTEWATER, EFFLUENT OF WASTEWATER TREATMENT PLANT AND OTHER RESOURCES USED IN THE ISLAND WILL BE IDENTIFIED AND THE AMOUNT OF PRODUCED WATER AND QUALITY OF EACH OF THESE SOURCES AND THE DEVELOPMENT OF FUTURE OR LIMITATIONS IN RESOURCES OVER TIME WILL BE DETECTED.FINALLY, WHILE PRESENTING A GENERAL MODEL TO IMPLEMENT THE INTEGRATED WATER RESOURCES MANAGEMENT IN THE ISLANDS, A DISCUSSION ABOUT THE CHALLENGES USING STUDIES AND OUTCOMES ECONOMIC ANALYSIS AS ONE OF THE MOST IMPORTANT ELEMENTS OF AN IWRM AND THE CONSEQUENCE ANALYSIS IS APPROACHED. KEYWORDS: SUSTAINABLE DEVELOPMENT, INTEGRATED WATER RESOURCES MANAGEMENT, KISH ISLAND, WEAP.