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Erosion Control

Hand Seeding: Hand sowing or (planting) is the process of casting handfuls of seed over prepared ground, or broadcasting (from which the technological term is derived). Usually, a drag or harrow is employed to incorporate the seed into the soil. Though labor intensive for any but small areas, this method is still used in some situations. Practice is required to sow evenly and at the desired rate. A hand seeder can be used for sowing, though it is less of a help than it is for the smaller seeds of grasses and legumes.

Hydroseeding: (or hydraulic mulch seeding, hydro-mulching, hydroseeding) is a planting process which utilizes a slurry of seed and mulch. The slurry is transported in a tank, either truck- or trailer-mounted and sprayed over prepared ground. Helicopters have been used to cover larger areas. Aircraft application may also be used on burned wilderness areas after a fire, and in such uses may contain only soil stabilizer to avoid introducing non-native plant species. Hydroseeding is an alternative to the traditional process of broadcasting or sowing dry seed. The slurry often has other ingredients including fertilizer, tackifying agents, green dye and other additives.

Sod Lawns: Sod or turf is grass and the part of the soil beneath it held together by the roots, or a piece of thin material. Sod can create an instant lawn or sod can be used to repair a small area of lawn that has died.

Silt Fence: sometimes (misleadingly) called a “filter fence,” is a temporary sediment control device used on construction sites to protect water quality in nearby streams, rivers, lakes and seas from sediment (loose soil) in stormwater runoff. Silt fences are widely used on construction sites in North America and elsewhere, due to their low cost and simple design, although their effectiveness in controlling sediment is often rather limited, due to problems with design, installation and/or maintenance.

Safety Fence: Used as a barrier around trees and in areas that are determined as “off limits”

Coir Fiber Baffles: A Coir Fiber Baffle is a porous barrier installed in sediment dams and silt basins. The baffles reduce velocity of the runoff into the erosion control device, which facilitates the settling of sediment before being discharged offsite. The baffle consists of a coir fiber mat supported by steel T-posts that are also used for Temporary Silt Fence. Baffles help prevent short-circuiting of flows through the device to the outlet point with little or no settling time. In addition, the baffles improve sediment retention because they distribute the flow, which reduces turbulence of the runoff inside the device.

Erosion Control Blanket/Matting: Erosion control blankets are used to temporarily stabilize and protect disturbed soil from raindrop impact and surface erosion, to increase infiltration, decrease compaction and soil crusting, and to conserve soil moisture. Mulching with erosion control blankets will increase the germination rates for grasses and legumes and promote vegetation establishment. Erosion control blankets also protect seeds from predators, reduce desiccation and evaporation by insulating the soil and seed environment.

Diversion Bank: A channel with an earth bank on its lower side constructed across the slope to divert water from areas where it is in excess, to sites where it can be used or discharged safely.

Diversion Berm: An alternative name for a diversion bank (q.v.).

Diversion canal: A canal to divert water from one point to another. In irrigation practice, a canal extending from the point of diversion at the main canal to the beginning of the distribution system.

Construction Entrances: A temporary stone-stabilized pad located at points of vehicular ingress and egress on a construction site, used to provide a stable entrance and exit from a construction site and keep mud and sediment out of public roads.