Option A: freshwater, drainage basins

Which arrangement of rocks most often produces a waterfall?

A river channel is rectangular, 10 m wide and 2 m deep at bankfull. What is its hydraulic radius?

During a flood, why is the coarsest sediment deposited closest to the river channel, building up a levee?

Two basins of the same size and shape receive the same storm. Basin X is on permeable chalk and basin Y is on impermeable clay. How will basin X's storm hydrograph differ from basin Y's?

A town straightens and deepens its stretch of river to reduce local flooding. What is the most likely effect on a village farther downstream?

The recurrence interval of a flood is (n + 1) / m, where n is the number of years of record and m is the flood's rank. In 39 years of records, what is the recurrence interval of the 4th largest annual flood?