The Colorado River near Moab, Utah. (IMAGE) Utah State University Caption The Colorado River is the most important water resource in the semi-arid western United States. Scientists at Utah State University have developed a tool to forecast long-term drought and water flow for the river that could help policymakers prepare for changes that impact millions of people. Credit Photo by Stephen Walker Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.