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Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

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Conservation Strategies for Growing Communities
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Page 1: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Conservation Strategies for Growing Communities

Page 2: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

The Growth of Urban Conservation

Page 3: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

What the Law Requires

• National Pollutant Discharge Elimination System (NPDES)

• Nonpoint Source Pollution (NPS)

• Storm Water Regulations

• NPDES Phase II

Page 4: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Iowa Cities Subject to Phase I and II of NPDES

• Des Moines Area• Cedar Rapids Area• Waterloo/Cedar Falls• Quad Cities• Council Bluffs Area• Sioux City Area• Dubuque Area• Iowa City Area• Marshalltown• Ottumwa• Storm Lake

Page 5: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Storm Water Pollution Prevention Planning (SWPPP)

• Minimize clearing and grading• Phase essential grading to limit soil exposure• Immediately stabilize exposed soils• Protect steep slopes and cuts• Protect and stabilize drainageways• Install perimeter controls to keep sediment on-site• Train contractors on SWPPP implementation• Inspect SWPPP practices after storms and perform needed

maintenance• Adjust the plan once construction has started, if needed

Page 6: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Soil Erosion

Wind Erosion

Stream Bank Erosion Gully Erosion

Sheet & Rill Erosion

Page 7: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Erosion Control Practices

• Compost Blankets• Grading Strategies• Mulching• Rolled Erosion

Control Products• Vegetative

EstablishmentCompost Blanket on a storm water detention

basin at North High School in Davenport.

Page 8: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Compost Blankets

Applying compost and seed with a pneumatic blower truck

Compost Blankets control erosion until seeding is

established

Page 9: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Grading Strategies

Design developments to fit the existing landscape.

Page 10: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Mulching

Applying Straw Mulch

Mulching limits soil erosion, lessens the need to contain sediment and enhances water quality.

Page 11: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Rolled Erosion Control Products (RECP’s)

Coconut Fiber Matting

RECP’s are especially effective at controlling erosion on severe slopes or areas of concentrated flows.

Page 12: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Vegetative Establishment

Establishing vegetative cover is the best way to control erosion.

Page 13: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Sediment Control Practices

• Compost Filter Berms

• Compost Socks

• Filter Strips

• GeoRidge™

• Inlet Protection Devices

• Rock Check Dams

• Sediment Control Basins

• Silt Fences Rock Check Dams add water quality protection by temporarily impounding runoff from frequent, low

intensity rainfalls.

Page 14: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Compost Filter Berms

Compost Filter Berms improve water quality by absorbing pollutants.

Page 15: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Compost Socks

Compost Socks should be placed on the contour across slopes to intercept and treat sheet flows.

Page 16: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Filter Strips

Filter Strips should be left permanent to protect urban streams, ponds and wetlands.

Page 17: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

GeoRidge™

GeoRidge™ complements the performance of erosion control blankets on channels and slopes.

Page 18: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Inlet Protection

Inlet Protection Devices trap and filter sediment before entering storm sewer inlets.

Page 19: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Rock Check Dams

Rock Check Dams prevent gully erosion caused by concentrated flow.

Page 20: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Sediment Control Basins

Maximizing the amount of time water is impounded increases the amount of sediment retained on site.

Page 21: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Silt Fences

Silt Fences temporarily impound runoff and retain sediment on-site, often as

perimeter control.

Page 22: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Storm Water Management-Low Impact Development (LID)

• Bioretention Cells• Bioswales• Infiltration Trenches• Native Landscaping• Permeable Paving

Alternatives• Rain Gardens• Soil Quality

RestorationBioretention Cells manage runoff from impervious surfaces.

Page 23: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Bioretention Cells

Bioretention Cells are shallow, landscaped depressions that can handle large volumes of runoff.

Page 24: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Bioswales

Bioswales are vegetated conveyance systems that provide an alternative to storm sewers.

Page 25: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Infiltration Trenches

Infiltration Trenches are excavated trenches filled with a coarse stone aggregate and biologically active organic matter.

Page 26: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Native Landscaping

Fall Colors

Summer Colors

High organic matter in native plants helps soil hold water like a sponge and infiltrate most rain.

Page 27: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Permeable Paving Alternatives

Impervious surfaces that allow water to infiltrate.

Page 28: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Rain Gardens

Perennial gardens featuring native vegetation strategically located to capture runoff.

Page 29: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Soil Quality Restoration

Key to restoring soil quality is reducing soil compaction and increasing organic matter content.

Page 30: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

Final Thoughts

• Practices as of 2004• Design Standards & Specifications• Statewide Urban Design and Specifications

manual (SUDAS)Helpful Websites:ia.nrcs.usda.gov

iamu.orgurbanwaterquality.org

epa.govstormh2o.com

cwp.orglowimpactdevelopment.org

stormwatercenter.netgreeninfrastructure.net

rmi.orgiowadnr.com

Page 31: Conservation Strategies for Growing Communities. The Growth of Urban Conservation.

• Environmental Protection Agency (EPA)• Iowa Association of Municipal Utilities (IAMU)• Iowa Department of Agriculture and Land Stewardship (IDALS)• Iowa Department of Natural Resources (DNR)• Iowa State University Extension Service

• Urban Resources & Borderland Alliance Network (URBAN)

Developed in cooperation with:

The USDA is an equal opportunity provider and employer.


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