FYN Principle #8 - Reduce Stormwater Runoff

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Information about FYN Principle #8 - Reduce Stormwater Runoff

Published on May 7, 2009

Author: CCextension

Source: slideshare.net

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FYN Principle #8:
Reduce Stormwater Runoff

Rebecca McNair & Allison Steele
Florida Yards & Neighborhoods Program
http://charlotte.ifas.ufl.edu

Reduce Stormwater Runoff Stormwater Runoff Define Problems Solutions Best Management Practices (BMP) Prevent Runoff Vegetative Cover -Alternative Groundcovers Reduce Pollutants -Fertilizer -Pesticides Author: Rebecca McNair Edited by: Allison Steele

Hydrologic Cycle Water on earth is constantly recycled Components of water cycle: Soil Infiltration Evaporation Transpiration- the process by which plants release water into the atmosphere Surface and channel storage Groundwater storage

Water on earth is constantly recycled

Components of water cycle:

Soil Infiltration

Evaporation

Transpiration- the process by which plants release water into the atmosphere

Surface and channel storage

Groundwater storage

The soil matrix filters and somewhat detoxifies impurities from water as it travels through the ground.

Urbanization Intensity of land use Amount of impervious surfaces Water quality degradation

Stormwater Runoff - Rainwater that flows off yards, roads and parking lots, carrying pollutants into our waterways.

Nonpoint source pollution Sources of pollution that can not be pinpointed to any single cause. Usually associated with trash, car oil, chemical lawn products, and other residues that are easily carried away by flowing water.

According to the EPA, polluted runoff is the #1 water quality issue in Florida Nutrients Toxins Sediments Thermal Stress Debris Pathogens Photo courtesy of NEMO

Nutrients

Toxins Sediments

Thermal Stress

Debris

Pathogens

Stormwater Contaminants nitrogen, phosphorus Nutrients sodium chloride, calcium chloride Salts sand, silt, and other particles Sediment grass clippings, fallen leaves, human and animal waste Biochemical oxygen demand (BOD) viruses, bacteria, protozoa Pathogen pesticides, oil, gasoline, grease Organic chemicals zinc, cadmium, copper, chromium, arsenic, lead Metals

The Problem Increased volume of surface runoff Increased velocity of surface runoff Concentration of pollutants in runoff Erosion Sedimentation Flooding Lowered water quality

Increased volume of surface runoff

Increased velocity of surface runoff

Concentration of pollutants in runoff

Elevated nutrients can cause : Polluted drinking water Excessive aquatic plant growth Lower dissolved oxygen levels Fish Kills

Elevated nutrients can cause :

Polluted drinking water

Excessive aquatic plant growth

Lower dissolved oxygen levels

Fish Kills

The Solution Use practices or methods to prevent, reduce, retard, or remove stormwater runoff contaminants before reaching receiving waters Best Management Practices (BMP) are a series of direct recommendations based upon research, evaluation and educated assumptions

Use practices or methods to prevent, reduce, retard, or remove stormwater runoff contaminants before reaching receiving waters

Best Management Practices (BMP) are a series of direct recommendations based upon research, evaluation and educated assumptions

Be Florida-Friendly Regardless of the type of property you own, you can help preserve Florida’s natural resources by: Preventing Runoff Increasing Vegetative Cover Reducing Pollutants

Regardless of the type of property you own, you can help preserve Florida’s natural resources by:

Preventing Runoff

Increasing Vegetative Cover

Reducing Pollutants

Prevent Runoff Keep rain and irrigation water on your property and out of storm drains.

Factors Affecting Stormwater Runoff: Rainfall intensity, flow rate, season % Impervious surfaces Watershed size, slope Soil type, soil compaction Type of vegetation Density of vegetation Within our control Not within our control

Rainfall intensity, flow rate, season

% Impervious surfaces

Watershed size, slope

Soil type, soil compaction

Type of vegetation

Density of vegetation

Within our control

Not within our control

Minimize runoff by using pervious surfaces… for walkways, patios, and driveways

Direct downspouts and gutters towards porous areas If downspouts drain to planted areas, be sure to select plants adapted to periodic flooding.

Collect Rain Water Use a rain barrel or a cistern to collect and store runoff for irrigation purposes

Use a rain barrel or a cistern to collect and store runoff for irrigation purposes

Water during early morning hours Plants are already wet Less evaporation losses Water less frequently in cooler months Water “as needed,” not routinely Do not irrigate if rain is expected Plan irrigation schedules according to the weather

Water during early morning hours

Plants are already wet

Less evaporation losses

Water less frequently in cooler months

Water “as needed,” not routinely

Do not irrigate if rain is expected

Earth Shaping If your property is sloped, you may want to make minor grade changes to divert runoff. This can be accomplished by: Utilizing terraces Terracing can be an attractive design element in your yard.

If your property is sloped, you may want to make minor grade changes to divert runoff. This can be accomplished by:

Utilizing terraces

Berms and Swales Creating swales (low areas) and berms (raised earthen areas) will help to catch, hold, and filter stormwater Elevations and depressions as small as 3-6 inches can make a huge difference

Creating swales (low areas) and berms (raised earthen areas) will help to catch, hold, and filter stormwater

Elevations and depressions as small as 3-6 inches can make a huge difference

Vegetative Cover Planting groundcovers on slopes is an excellent way to: Catch and filter stormwater Slow the velocity of water movement Reduce erosion Turfgrass is a versatile groundcover that is very effective at filtering nutrients.

Planting groundcovers on slopes is an excellent way to:

Catch and filter stormwater

Slow the velocity of water movement

Reduce erosion

Attractive Insulates the soil Acts as a living mulch that helps to build up humus levels in the soil Provides habitat and cover for beneficial insects and other predators Covering the ground with a carpet of vegetation has other advantages: Blanketflower Gaillardia pulchella

Attractive

Insulates the soil

Acts as a living mulch that helps to build up humus levels in the soil

Provides habitat and cover for beneficial insects and other predators

Disadvantages If the ground cover is too vigorous, it may require containment It can compete with other plants for water and nutrients The following factors should also be taken into account, when choosing the right plant for the right place… Sweet potato Ipomea batatas ‘Margarita'

If the ground cover is too vigorous, it may require containment

It can compete with other plants for water and nutrients

Select plants based on site conditions: Acid  alkaline- (test your soil’s pH) Dry  moist Full sun  shade Heat  cold Salt Space Obstructions Periwinkle Catharanthus roseus ‘Diva’

Acid  alkaline- (test your soil’s pH)

Dry  moist

Full sun  shade

Heat  cold

Salt

Space

Obstructions

Alternative Groundcovers For Shade Lilyturf Liriope muscari (USDA Zone 6-11) Periwinkle Vinca major (USDA Zone 8-11) Cast Iron Plant Aspidistra elatior (USDA Zone 8-11)

Alternative Groundcovers Beach Sunflower Helianthus debilis (USDA Zone 8B-11) Perennial Peanut Arachis glabrata (USDA Zone 8-11) Clover Trifolium repens (USDA Zone 5-11)

Alternative Groundcovers Junipers (USDA Zone 8-11) Juniperus spp . For Sun Asiatic Jasmine (USDA Zone 8-11) Trachelospermum asiaticum

Tree Canopy Incorporate trees in the landscape Intercept rainfall Reduce soil compaction thus improving water infiltration into soil Increase the value of property Energy efficient way to cool the home

Incorporate trees in the landscape

Intercept rainfall

Reduce soil compaction thus improving water infiltration into soil

Increase the value of property

Energy efficient way to cool the home

Reduce Pollutants

Sweep grass and soil back onto lawns Sweep up any fertilizer on impervious surfaces Remove trash Clean up oil spills and leaks with cat litter Pick up after pets Because water can wash off our yards, it is important to reduce the amount of pollutants on our property.

Sweep grass and soil back onto lawns

Sweep up any fertilizer on impervious surfaces

Remove trash

Clean up oil spills and leaks with cat litter

Pick up after pets

It is unrealistic, and even unwise to strive for an insect, disease, and weed-free yard. Instead: Learn to identify key pests associated with the plants in your yard Check plants regularly for signs of pest problems Determine what amount of damage warrants action

Learn to identify key pests associated with the plants in your yard

Check plants regularly for signs of pest problems

Determine what amount of damage warrants action

Manage Yard Pests Responsibly Avoid routine applications of pesticides Choose the least harmful method of control Treat only affected area rather than spraying the entire yard

Avoid routine applications of pesticides

Choose the least harmful method of control

Treat only affected area rather than spraying the entire yard

Fertilize Appropriately Follow printed instructions carefully! Do not apply fertilizer or pesticides before a heavy rainstorm If applied improperly, excess fertilizers can run off our yards into waterways or leach into groundwater.

Follow printed instructions carefully!

Do not apply fertilizer or pesticides before a heavy rainstorm

Further Reading http://edis.ifas.ufl.edu SL 143: How Contaminants Reach Groundwater PI 2: Factors Influencing Pesticide Movement to Groundwater FRE 76 Laws Governing Use and Impact of Agricultural Chemicals: Agricultural Chemicals and Water Pollution ENY 294: The Smart Way to Avoid Landscape Pests and Other Problems

SL 143: How Contaminants Reach Groundwater

PI 2: Factors Influencing Pesticide Movement to Groundwater

FRE 76 Laws Governing Use and Impact of Agricultural Chemicals: Agricultural Chemicals and Water Pollution

ENY 294: The Smart Way to Avoid Landscape Pests and Other Problems

Thanks for your attention! The following presentation was made possible through a grant from FL DEP and EPA. Special thanks to the following reviewers for their valued contributions: FL114 ELM Design Team and the FYN Subcommittee Institute of Food and Agricultural Sciences, UF Agriculture Education and Communication Department Environmental Horticulture Department Entomology and Nematology Department Soil and Water Sciences Department Florida Cooperative Extension Service in: Alachua, Broward, Clay, Hillsborough, Lake, Miami-Dade, Orange, Pinellas, Sarasota, and Volusia Counties Florida Organics Recycling Center for Excellence The Center For Wetlands, UF United States Department of Agriculture FL Department of Agriculture and Consumer Sciences: Division of Plant Industry

The following presentation was made possible through a grant from FL DEP and EPA. Special thanks to the following reviewers for their valued contributions:

FL114 ELM Design Team and the FYN Subcommittee

Institute of Food and Agricultural Sciences, UF

Agriculture Education and Communication Department

Environmental Horticulture Department

Entomology and Nematology Department

Soil and Water Sciences Department

Florida Cooperative Extension Service in: Alachua, Broward, Clay, Hillsborough, Lake, Miami-Dade, Orange, Pinellas, Sarasota, and Volusia Counties

Florida Organics Recycling Center for Excellence

The Center For Wetlands, UF

United States Department of Agriculture

FL Department of Agriculture and Consumer Sciences: Division of Plant Industry

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