FLOOD POTENTIAL IN THE LOWER COLORADO RIVER BASIN

The following are generalized discussions of the flood potential due to snowmelt in the Lower Colorado River drainage as of April 1, 2000. Discussions are segregated by state. It is important to understand that the potential for flooding may increase if significant rainfall events occur.

 

ARIZONA: The potential for snowmelt flooding in Arizona is low at this time. Snow water equivalent values as of April 1 ranged from 10% to 30% of median in the Gila, Little Colorado and Salt river basins. Runoff volumes for April through May are forecast to be much below median and no individual sites are expected to exceed flood stage.

 

NEW MEXICO: The potential for snowmelt flooding on the upper Gila River and on the Little Colorado River drainage in New Mexico is low at this time. Snow water equivalent values as of April 1 were 10% of median in the upper Gila River Basin. The April through May runoff volumes are forecast to be much below median with no individual sites forecast to exceed flood stage.

 

UTAH: The potential for snowmelt flooding along the Virgin and Santa Clara rivers is not high at this time. Snow water equivalent values were 90% of average on April 1. Runoff volume forecasts for the April to July period are between 60% and 85% of average with no individual sites expected to exceed flood stage