The Infamous Five Color Theorem Dan Teague NC School of Science and Mathematics [email protected].
Katie Teague County Extension Agent- Agriculture/Water Quality
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Transcript of Katie Teague County Extension Agent- Agriculture/Water Quality
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Cooperative Extension Service
Stormwater Training
Katie TeagueCounty Extension Agent- Agriculture/Water
Quality
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What is Extension? Division of the Land-Grant Universities
located in all 50 states & Puerto Rico
“Cooperative” effort Federal, State & county partnership
Outreach & Education provide informal public education relay research information
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NWA RegionalStormwaterEducation Program
University of Arkansas Cooperative Extension Service
Since July 2004…
12 CitiesBenton and Washington Counties
U of A – Fayetteville Campus
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• Educating each other about stormwater• Reducing the financial cost for implementing mandated stormwater control measures • Increasing the effectiveness of public education and participation programs• Protecting water quality on a regional basis
By working together, the Benton and Washington County MS4s are:
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Let's take a quiz…
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Stormwater Dynamics
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What is stormwater?
Runoff from natural precipitation, suchas rain events and snow melt and other
surface runoff and drainage
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What Is a Watershed? A watershed is the area of land that
all drains to a particular point
Center for Watershed Protection
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40%Evapotranspirat
ion
25% Deepinfiltration
25%Shallow
infiltration
Natural Ground Cover
10% Runoff
Source: U.S. EPA
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Source: USDA/NRCS
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Source: U.S. EPA
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30%Evapotranspiratio
n
5% Deepinfiltration10%
Shallow infiltration
75 – 100%Impervious surface
55% Runoff
Source: U.S. EPA
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Many Forms of Impervious Cover in the Urban Landscape
Roads
Parking
Buildings
Sidewalks
Driveways
Center for Watershed Protection
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Impervious cover,
such as this parking,
lot, is impermeable to rainfall,
creatingrunoff flowing
intostorm drains.
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When it rains, a large amount of water . . .
Enters the stormdrain
system
Is directed to nearby streams
Runs off of impervious surfaces
Center for Watershed Protection
Impervious Cover Influences Wet Weather
Stream Flow
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More Frequent Flooding Center for Watershed Protection
Higher Flood Levels
The large amount of stormwater runoff in the stream system can cause:
Impervious Cover Influences Wet Weather
Stream Flow
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Center for Watershed Protection
Large amounts of stormwater runoff due to impervious cover can:
Impervious Cover Influences Stream Shape and Size
Cause straightening of the channel
Deposit soil on the stream bottom, making the stream more shallow
Erode stream banks, making the banks steeper and the channel wider
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8-10%
20%
30%> 65%Center for Watershed Protection
Impervious Cover
Stream Quality is Related to Impervious Cover
< 5%
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Storm Drainage System: All surfaces, structures and systems that contribute to or convey stormwater runoff
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Pollutant: Any substance that contributes to water pollution, including:
Rubbish, garbage, solid waste, litter,
debris, yard waste, pesticides, herbicides, fertilizers, pet waste, animal
waste, domestic sewage, industrial waste, mechanical fluid, oil, motor oil,
grease, petroleum products, antifreeze, surfactants, solvents, detergents,
cleaning agents, paint, heavy metals, toxins, household hazardous waste, small
quantity generator waste, hazardous substances, hazardous waste, soil and
sediment
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Stormwater Issues…
Developed and disturbed land contributes to problems in terms of:
Water qualityWater quantity
Other pollutants enter stormsewers and pollute stormwater:
Illicit dischargesIllicit connections