When infiltration capacity is exceeded and water begins to move ...

[haleyc112]

When infiltration capacity is exceeded and water begins to move rapidly downslope, a continuous film
  of water known as ___________________ _ flow develops. This type of flow can cause
  ___________________ _. Fill in the blank(s) with the appropriate word(s).

Question 2

The gradient of streams tends to be ___________________ _ in their upper reaches and
  ___________________ _ in their lower reaches. Fill in the blank(s) with the appropriate word(s).

[nital]

Answer to Question 1

sheet, sheet erosion

Answer to Question 2

steeper, gentler