Lake Dredging POLLUTANTS ADDRESSED: Sediments, Nutrients and Organics, Salinity
DESCRIPTION: Dredging is an excavation activity in which materials are recovered from beneath the water's surface. The purpose is generally to gather bottom sediment and either dispose it at a different location or to excavate the roots of nuisance weeds which concentrate nutrients. By removing these nutrients the cycle of lake eutrophization can be terminated.
POTENTIAL TREATMENT AREAS: Lakes in agricultural/ranch lands Lakes in development lands ALTERNATIVE MANAGEMENT MEASURES: Pole/Post Planting Vertical Bundle Willow Fascines Brush or Tree Revetment
LOAD REDUCTION MECHANISM: Organics/Nutrients Management- Nutrients deposited in the lake by overland flow and stream waters, then absorbed by lake plants, are removed by dredging.
PERMITTING REQUIREMENTS: Requirements vary by location. A permit under sections 404 and 401 of the Clean Water Act, and/or county floodplain.
LAND USE CLASSIFICATION: Agricultural and Ranch Lands Disturbed Areas Urban Lands
Contact county regional flood control district.
ADDITIONAL BENEFITS: Open stream flow-lane and produce material to be used within-banks placement. It can be used to enhance or restore habitat. It method of weed reduction.
Arid Southwest BMP
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