• Water SecurityGroundwater Flow to Colorado River May Decline by a Third over Next 30 Years

    A new study projects that a hot and dry future climate may lead to a 29 percent decline in Upper Colorado River Basin “baseflow” at the basin outlet by the 2050s, affecting both people and ecosystems. Baseflow is the movement of groundwater into streams and, on average, accounts for more than 50 percent of annual streamflow in the Upper Colorado River Basin.