Lesson 5

Question 1

Movement of water into the soil under gravity and capillary forces.

Answer 1

Infiltration

Question 2

For excess rate of rainfall, the actual infiltration rate will follow a limiting curve called —————– curve of the soil.

Answer 2

infiltration capacity

Question 3

The hydrologic concept of infiltration capacity is empirically based on observations at the ground surface.

Answer 3

Horton Equation.

Question 4

The simplest method of estimating infiltration rate and is calculated by finding the loss difference between gross precipitation and observed surface runoff measured as hydrograph.

Answer 4

Pi - Index Method.

Question 5

Developed for small basins

Answer 5

SCS Curve Number Method of Estima

Question 6

Total rainfall P separated into 3 parts:

Answer 6

Direct runoff (Excess Rainfall) Pe
–Continuing Loss Fa
–Initial Loss Ia

Question 7

(AMC)

Answer 7

Antecedent Moisture Conditions

Question 8

low moisture (dry condition)

Answer 8

AMC I

Question 9

average moisture condition (normal condition)

Answer 9

AMC II

Question 10

high moisture, heavy rainfall over preceding few days (wet condition)

Answer 10

AMC III -