3 Erosion and Sediment Transport - 3.5 Management of Erosion and Sediments

Question 1

Management of Erosion and Sediments

See pict on slide 65

Answer 1

• Structural measures
• Vegetative measures
• Agronomic measures
• Management measures

Question 2

Measures – Land Surface

Answer 2

 Terraces

 Gabions, Stone bunds

 Vegetative Filter strips

 Grassed waterways

 Agroforestry

 Minimum/zero tillage, contour plowing

 Mulching of fields

 Minimize grazing

 Windbreaks

 Contour land

 Strip cropping

 Gully sediment traps (prevent headward retreat)

Question 3

Erosion Protection Measures – Examples

See pict on slide 67

Answer 3

• Erosion protection by mulch mats (campuran jerami)

- Erosion protection mat from coconut fiber

Question 4

Measures – River Bed

Answer 4

measures against erosion:
 lower slope, e.g. with ramps
 widen cross section
 extend river course
 add bed load

measures against aggradation (the deposition of material by a river, stream, or current.):
 shorten river course, rise slope
 narrow river cross section, rise depth
 remove coarse bed load
 remove aggradation by dredging