The land on the banks of rivers can easily erode over time.As the path of the river changes, it could intrude on your property and threaten your structures.You can either build a rock wall that blocks out water or you can plant trees to prevent erosion.If there are any environmental restrictions that you need to be aware of, be sure to check with your local environmental officials.
Step 1: 700-900 grams of coir nets are per square meter.
Coconut fibers are used to make coir net.Heavy duty nets should be used when there is a lot of water.Online or in specialty landscaping and yardwork stores, coir nets can be purchased.Coir nets can last from 24 to 48 months in certain climates.To find the size of the area you need to cover, use a measuring tape.
Step 2: The river bank has grass, weeds, and debris.
Use a hoe or a sod cutter to expose the soil on the river bank.To remove the roots, dig 2 inches deep.This ensures that the soil is completely covered.
Step 3: Add 5 centimetres to the ground.
If you want to plant vegetation, cover the river bank with soil.Rake and fertilize the soil before planting.Since the coir nets need to lay flat, the soil should not have clumps.You can grow grass through the spaces of the nets by applying grass seed.If you don't plan on planting anything, you do not need to fertilize the soil.
Step 4: The trench is deep by 15 cm and wide at the top of the slope.
Use a shovel or a trench digger to move the netting across the entire area.The trench is an anchor point and prevents water from flowing under it.
Step 5: Attach the net to the trench.
The bottom of the trench should be flush with the walls.There is an extra 30 cm on the side of the trench furthest from the river bank.This will be secured later on.
Step 6: The pins are 30 cm apart and are in the trench.
The pins should be secured with a rubber mallet.The ground should be flushed with the top of each pin.The pins should be staggered by 5 centimetres to hold the taut net.The pin length can be determined by the firmness of the soil.Pin at least 45 centimetres (18 in) long if you have loose soil.Pin 30 centimetres (12 in) long if the soil is firm.Most hardware stores have these.The pins will not degrade over time.
Step 7: The trench needs to be filled with dirt.
To compact it, press dirt back into the trench.After it has been filled, fold the extra net over the dirt.Place it between the first set of pins on the ground.Before folding the net, fill the trench with dirt and plant grass seeds.
Step 8: The rest of the net should be rolled down the slope.
The net should be cut with a pair of scissors when you reach the bottom of the slope.You can have someone help with the nets since they come in a 5 by 25 m roll.
Step 9: Hammer at least 4 pins.
The pins should be staggered 40 to 60 centimetres across the net.Make sure that the soil is clean and the nets are secure.8 pins per 1 square metres (11 sq ft) is what you should use for harsher slopes.
Step 10: There are overlap nets on each side.
This keeps water out of your soil.The pins should be staggered so that they secure both sides of the overlap.
Step 11: Look for trees like willows and alders.
Purchase plants from your local nursery.The moist soils on the river bank allow these trees to survive.Birds and insects are attracted to the trees near the river.It will take time for them to protect against erosion.Use trees that are native to the area.You can find trees further along the riverbank.
Step 12: Plants that have already been established.
Don't plant seeds near the river since it could cause the soil to erode.Plants that have grown in pots can be purchased at a local nursery.Pick a variety of species that represent what grows in the area.
Step 13: The vegetation needs to be at least 1 metres away from the river.
The soil can be more damaged by planting trees and shrubs closer to the water.The soil will be closer to the river as the roots grow.
Step 14: The hole should be deeper and wider than the root system.
The hole can be made with a shovel or spade.You have more space to fill the dirt back in with the extra depth and width.
Step 15: If you want to refill the hole, put the vegetation in it.
Make sure the root system is in contact with the soil.If you fill the soil with your foot, it will firm up the base of your tree.The root system should be covered with soil.The plants should be at least 2 metres apart.
Step 16: Determine the river's velocity to find out what size rocks you need.
Count the number of seconds it takes for a wood chip to travel 50 feet.Divide 50 feet by the number of seconds it took to find the speed.The water is 4.16 feet (1.27 m) per second if it takes 12 seconds for the wood chip to travel 50 feet (15 m).For water that moves 2 to 4 feet (0.61 to 1.22 m) per second, use rocks 3 to 6 inches wide.Rocks 4 to 12 inches (10 to 30 cm) wide can be used for water that moves up to 6 feet (1.2 to 1.8 m) per second.Rocks 5 to 18 inches (13 to 46 cm) wide are used for water that moves 6 to 12 feet per second.
Step 17: Granite or limestone can be used.
If you use round rocks, they leave less open space.Granite and limestone are resistant to freezing and thawing.As long as it varies in size, broken concrete can be used.Ask the landscaping store how many rocks you need for the area.
Step 18: It is twice as long if you slope the river bank.
A mini-bulldozer can be rented to remove layers of soil.It's important that your riprap wall is tall enough to handle the river at its highest point.The riprap is on the sloped side of the right triangle.The height should be 2 times longer than the bottom.If you need to build a riprap 6 feet high, it should extend a total of 12 feet.You would have a total slope length of approximately 13 feet.The slope should go down to the top of the river bank.
Step 19: If you want the soil to be stable, lay the fabric on the slope.
You can purchase a roll of fabric online or at specialty stores.It should be over the entire slope.U-shaped pins are used to secure the netting down.You can layer 6 inches (15 cm) of gravel on top of the fabric for added protection.
Step 20: The riprap is 12 to 18 inches thick if you layer the rocks.
As the bottom layer, place the largest rocks.The areas between them should be filled with smaller stones.Water cannot move through the rocks if they are close together.You can fill the space with a variety of stone sizes.