THE PRACTICAL GUIDE TO LAKE MANAGEMENT IN MASSACHUSETTS
http://www.mass.gov/dcr/waterSupply/lakepond/downloads/practical_guide.pdf

COVERING BOTTOM SEDIMENTS AS A LAKE RESTORATION TECHNIQUE
http://www.blackwell-synergy.com/doi/abs/10.1111/j.1752-1688.1980.tb02509.x?journalCode=jawr

“ABSTRACT: Sediment covering to control macrophytes and sediment nutrient release is reviewed. It is concluded that fly ash application to control sediment phosphorus release presents more dangers to the lake than benefits and should not be used. Polyethylene sheeting has not had long term effectiveness due to macrophyte regrowth on its surface. PVC-coated fiberglass screen* is expensive but nontoxic and appears to give long term macrophyte control. Similar results may be obtained with spun-bonded polypropylene**. Sand, clay, and sheeting to retard nutrient release have received insufficient attention.”

* Aquascreen
** Typar

WHAT IS A GEOTEXTILE ?

http://www.usfabricsinc.com/products/geotextiles.shtml

“A geotextile is typically defined as any permeable textile material used to increase soil stability, provide erosion control or aid in drainage. More simply put, if it is made of fabric and buried in the ground it’s a probably a geotextile”

“Non-woven geotextiles resemble felt and provide planar water flow. They are commonly known as filter fabrics (although woven monofilament filtration fabrics exist). Typical applications for non-woven geotextiles include aggregate drains, asphalt pavement overlays, and erosion control.”

SHADING AND SEDIMENT COVERS
http://lakes.chebucto.org/lakerest.html

MATERIAL-Black Polyethylene
Specific Gravity=0.95
Application Difficulty-High
Gas Permeability-Impermeable
Comments-Poor choice of materials, easily dislodged: "balloons"

MATERIAL-Polypropylene (Typar)
Specific Gravity=0.90
Application Difficulty-Low
Gas Permeability-Permeable
Comments-Effective

MATERIAL-Fiberglass PVC (Aquascreen)
Specific Gravity=2.54
Application Difficulty-Low
Gas Permeability-Permeable
Comments-Effective

MATERIAL-Nylon (Dartek)
Specific Gravity=1.0
Application Difficulty-Moderate
Gas Permeability-Impermeable
Comments-Effective if vented

MATERIAL-Burlap
Specific Gravity=1.0
Application Difficulty-Moderate
Gas Permeability-Permeable
Comments-Effective up to one season: rots

MATERIAL-Nylon- Silicone
Specific Gravity=1.5
Application Difficulty-?
Gas Permeability-Impermeable
Comments-Must be installed by dealer

EFFECTIVENESS OF A POLYPROPYLENE SHEETING IN CONTROLLING MACROPHYTE RE-GROWTH IN COUNTRY LAKE (PORTAGE CO., OHIO). G. Dennis Cooke and Mark E. Gorman. Department of Biological Sciences, Kent State University, Kent, 0. 44242 https://dspace1.it.ohio-state.edu/dspace/bitstream/1811/22660/1/V079NA_005

“Excessive production of macrophytes ("weeds") in ponds and lakes represent a significant nuisance to recreational and other water-related activities. This project was designed to test the effectiveness of black spun-bonded polypropylene Dupont Typar sheeting in controlling the re-growth of macrophytes, when the sheeting is applied to exposed pond sediments which had been consolidated and frozen during pond drawdown. Following application in March, 1978, biomass samples from the experimental area were compared to samples from a nearby transect during summer, 1978. Dupont Typar stopped the re-growth of macrophytes; only macroalgae and some Najas flexilis grew on the sheeting. Biomass in the control area was always 100X or more that of the covered area. High permeability of the sheeting allowed gases to escape, thus preventing "ballooning", a common fault of other sheeting compounds. Cost of application for selected lake or pond areas would be modest”