Erosion Control Practices

Question 1

the practice of preventing or controlling wind or water erosion in agriculture, land development, coastal areas, riverbanks, and construction

Answer 1

Erosion control

Question 2

Erosion control helps in following ways:

Answer 2

*sustain or improve crop yields
*reduce drainage costs
*retain nutrients and chemicals
*reduce hazards
*maintain good soil structure
*help improve water quality

Question 3

Natural and Vegetative Techniques (Erosion control practices)

Answer 3

1. Contouring
2. Strip cropping
3. Mulching\
4. Crop rotation
5. Zero tillage or dibble tillage

Question 4

planting along contours or land surface with the same elevation

Answer 4

contouring

Question 5

alternate planting of 2 or more different crops along contours

Answer 5

strip cropping

Question 6

placement of crop residues or other materials around the base of plants or throughout the field

Answer 6

mulching

Question 7

alternate planting of different crops on successive planting seasons

Answer 7

crop rotation

Question 8

a minimum tillage practices in which the crop is sown directly into soil not tilled since the previous crop

Answer 8

zero tillage or dibble tillage

Question 9

Engineering and Mechanical Methods (Erosion control practices)

Answer 9

*Terracing
*Protected Waterways
*Diversion channels
*Geotextile

Question 10

It reduces velocity and increasing time for infiltration

Answer 10

Terracing

Question 11

method of erosion control by constructing broad channels across the slope of rolling land

Answer 11

terracing

Question 12

for gullies, streams, rivers

Answer 12

protected waterways

Question 13

in protected waterways (use of grassed waterways) does what?

Answer 13

increases roughness coefficient

Question 14

in protected waterways (channel linings) uses what?

Answer 14

concrete, bricks, stone/ripraps

Question 15

In protected waterways (drop structures) have what?

Answer 15

weir, chute, drop spillway, drop inlet

Question 16

cut off and detour channels

Answer 16

diversion channels

Question 17

a natural or artificial channel that shortening a meandering sream. the purpose of ____ is to increase the velocity, shorten the channel length and to decrease length of levees

Answer 17

cut off

Question 18

a synthetic permeable textile used with soil and rock. perform functions of infiltration, allowing water is the soil to pass through the fabric while returning the soil particles

Answer 18

geotextile/geosynthetic

Question 19

example of geotextile

Answer 19

coconets (Dr. Justino Arboleda)

Question 20

Functions of terracing

Answer 20

*reduce soil erosion
*water conservation
*flood control