Page 11 - Water Pollution Management - Silty Water Treatment - Preventing Discharge

Check dams

Check that dams reduce scour and channel erosion by reducing flow
velocity and encouraging sediment settlement.

Dams may be constructed out of:
• rock

• gravel bags
• sandbags
• fibre rolls
• straw bales
• other proprietary products

Applications

• In small open channels that drain less than 4 ha.
• In steep channels where storm water velocities exceed 1.5 m/s.

• During the establishment of grass linings in drainage ditches or
channels

• In temporary ditches where the short length of service does not
warrant establishment of erosion-resistant linings

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