Question

Select the two conditions that resulted in the 1993 upper Mississippi River flood.

a. Severe precipitation was caused by warm moist air from the Gulf of Mexico and cold Arctic air merging.
b. The ground was already saturated from early spring rains.
c. Several dam breaches along the tributaries of the Mississippi River happened at once.

Answer 1

The 1993 upper Mississippi River flood was caused by severe precipitation from the merging of warm, moist air and cold Arctic air, and a saturated ground from early spring rains.

Step-by-step explanation:

The two conditions that resulted in the 1993 upper Mississippi River flood were severe precipitation and saturated ground conditions.

Firstly, the flood was due in part to severe precipitation which was caused by the merging of warm, moist air from the Gulf of Mexico with cold Arctic air.

Secondly, the flooding was exacerbated because the ground was already saturated from early spring rains, which meant that the excess water from the heavy rains could not be absorbed into the ground, leading to runoff and an increase in river levels.