Methods and practices

Question 1

GEOMATS

Answer 1

• Both natural and synthetic material
• Along roads, earth dikes and can be used for coastal protection. It is used to strengthen the slopes in the given area.

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Question 2

FIBERROLLS

Answer 2

• Natural materials
• Fiber rolls are used for minimizing gully and rill erosion development, it also reduce soil sediments from moving.
• most commonly used in agricultural areas

Question 3

SLIT FENCES

Answer 3

• Woven synthetic material
• used to prevent sediment contaminated water from the natural draninge ways.
• construction, homebuilding sights

Question 4

HYDROSEEDING

Answer 4

Natural materials

• construction sites, home building sites, slopes.

traps the sediment, grass roots spread’s deep in a short amount of time, and hold soil well.

Question 5

TURBIDITY CURTAN

Answer 5

• synthetic materials
• used in construction sites, bridge renovation, marine ports, and road construction
• Protects the environment and important ecosystems from sediment.

Question 6

CHECK DAMS

Answer 6

-Can be made of many different materials, brush wood, gabions, cement or vegetation.

Slow down water velocity and accumulate sediment during floods.

Question 7

DESIGN OF TERRACES AND INFILTRATION TRENCHES

Answer 7

Terraces catch water at intervals down the slope and temporarily store it before delivering it through underground tile/pipe or a grass to waterway to the bottom of the slope. Terraces help reducing erosion by reduce the amount and velocity of water moving across the soil surface.

Agricultural

Question 8

DESINGS OF GABIONS

Answer 8

• made of materials like metal or roughs materials such as rocks, concrete sand or soil.
• The gabion prevent erosion during floods by creating a barrier between the soil and floodwater. They can also dissipate energy from flowing water.
• used for stabilize shorelines, stream banks or slopes against erosion.

Question 9

GROYNES

Answer 9

The materials: wood, steal, concreate, rocks, rubble or sandbanks.

• Most used on coast
• The waves hit the groynes instead of directly hitting the beach. Groynes trap sediment, it protects the coast because it prevents the sand sediment from longshore drift.

Question 10

SOIL RIENFORCEMENT

Answer 10

There is both natural and synthetic options, the reinforcement of the soil can be done with geomats, wooden piles, or geogrids.

• Construction sites, but the method is used everywhere where the structure is built on soil with poor mechanical characteristics.
• reinforce the existing soil on the site.

Question 11

CANAL LINING

Answer 11

• along rivers and canals
• It act like a barrier protecting the sediment and soil from the water. It also prevent waterlogging across the lower areas of the canal.

Question 12

DIRT ROAD STABILIZATION AND DRAINGE

Answer 12

Natural - u can dig a ditch next to the road from the soil.
- drainage systems can also be placed under the road, and the “drainage pipes” can be made of concrete or hard plastic.

They are used where they are needed, alongside dirt roads. But road drainege are needed in urban areas as well because rain can create erosion thar can break up pavements.