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This chapter uses climate-sensitive decision environments along the Colorado River to illustrate the breadth and complexity of the water management issues and the role of climate in these contexts. The four examples are in: (1) the border region: international issues; (2) Arizona and California: interstate issues in the Lower Basin; (3) Native American water rights; and (4) conjunctive use and management: groundwater and surface water in Arizona. Published in Drought and water crises: science, technology, and management issues, in 2005.
Recent studies of past climate and streamflow conditions have broadened understanding of long-term water availability in the Colorado River, revealing many periods when streamflow was lower than at any time in the past 100 years of recorded flows. That information, along with two important trends--a rapid increase in urban populations in the West and significant climate warming in the region--will require that water managers prepare for possible reductions in water supplies that cannot be fully averted through traditional means. Colorado River Basin Water Management assesses existing scientific information, including temperature and streamflow records, tree-ring based reconstructions, and climate model projections,...
Used first paragraph of the chapter: Moisture is one of the premiere limiting factors for plants and animals, and where moisture is not limiting-in streams, marshes, lakes, and the land areas adjacent to these features (the riparian zone}:-one finds very distinctive communities of water� dependent and drought-intolerant species. Major streams in the foothills and basins of the San Juan region are commonly lined with riparian woodlands dominated by cottonwoods (Populus spp.). These wood� lands and associated phreatophytic vegeta�tion (composed of plants that require a perennial water source near the soil surface) have changed dramatically during the latter half of the nineteenth and the twentieth centuries on the...
Roughly centered on the Four Corners region of the southwestern United States, the Colorado Plateau covers an area of 130,000 square miles. The relatively high semi-arid province boasts nine national parks, sixteen national monuments, many state parks, and dozens of wilderness areas. With the highest concentration of parklands in North America and unique geological and ecological features, the area is of particular interest to researchers. Derived from the Eighth Biennial Conference of Research on the Colorado Plateau, this third volume in a series of research on the Colorado Plateau expands upon the previous two books. This volume focuses on the integration of science into resource management issues, summarizes...
Roughly centered on the Four Corners region of the southwestern United States, the Colorado Plateau covers an area of 130,000 square miles. The relatively high semi-arid province boasts nine national parks, sixteen national monuments, many state parks, and dozens of wilderness areas. With the highest concentration of parklands in North America and unique geological and ecological features, the area is of particular interest to researchers. Derived from the Eighth Biennial Conference of Research on the Colorado Plateau, this third volume in a series of research on the Colorado Plateau expands upon the previous two books. This volume focuses on the integration of science into resource management issues, summarizes...
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