ojjunkie: Floods occur when ponds, lakes, riverbeds, soil, and...

ojjunkie:

Floods occur when ponds, lakes, riverbeds, soil, and vegetation cannot absorb all the water. Water then runs off the land in quantities that cannot be carried within stream channels or retained in natural ponds, lakes, and man-made reservoirs. About 30 percent of all precipitation becomes runoff^[1] and that amount might be increased by water from melting snow.