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Week One
1.
2.
3.
4.

Introduction to and review of hydrologic / watershed Concepts
The Concept of Storm Water Management
Human Experiences with Storm Water
Storm Water and The Environment
What is Stormwater Runoff?
Think back to the water cycle…
Stwr100 wk1
 STORMWATER simply refers to the various forms of

precipitation… it’s the water from the storm.
 STORMWATER RUNOFF, is the surface runoff of
precipitation which has not infiltrated into ground or
surface storage reservoirs.
 Occurs
 During or after the storm when PRECIPITATION in the form of rain
or snowmelt flows over the ground as RUNOFF.
 Because


The soil surface is incapable of absorbing more precipitation


The soil is already SATURATED



Or the ground surface is IMPERVIOUS
Surface reservoirs are at their capacity


Where does stormwater runoff go?
 All Storm Water falls within a WATERSHED.
 A watershed is an area of land from which all rainfall
drains to a common outlet point.
 All land is a part of a watershed.
 Watersheds can be very large--like that of the
Mississippi River --or as small as a street or
neighborhood.
This diagram shows a
watershed in a
natural, undeveloped area.
It is important to visualize
the movement of water
into and through the
ground in addition to its
movement across the
surface in rivers and lakes
In a natural watershed, water
can infiltrate easily into the
ground, and this
groundwater is often
available for later use by
plants and people. Our area’s
water supply still comes
partly from pumped
groundwater reserves.
Pollutants in an undeveloped
watershed do not become
concentrated and are easily
broken down by natural
processes in the ecosystem
(soil microbes and plants).
Here are the main
watersheds of the St. Louis
Metropolitan Region
Small, local watersheds are
a part of larger watersheds.
The River Des Peres and
Dardenee Creek
watersheds, Respectively
are parts of the Middle
Mississippi and Missouri
River watersheds.
Since all of the watersheds
shown drain to the Gulf of
Mexico, they are all parts of
this much larger watershed.
Stwr100 wk1
Stwr100 wk1
Why is stormwater runoff a problem?
• Stormwater can pick up debris, chemicals, dirt, and other
pollutants and deliver them to a storm sewer system or
directly to a lake, stream, river, wetland, or coastal water.

• Anything that enters a STORM SEWER system is
DISCHARGED untreated into the waterbodies we use
for swimming, fishing and providing drinking
water.
When stormwater falls on
surfaces, it picks up
and carries with it a wide
variety of harmful pollutants.
IMPERVIOUS

• Impervious surfaces are
areas covered with
buildings or homes, streets
and parking lots as
opposed to ground
surfaces (soil, grass,
mulch, etc.)
•The amount of
impervious area has a
direct relationship to
the quantity of
pollutants contained in
stormwater runoff.
Pollutants from our cars, lawns, and pets build up as they wash quickly across the pavements, into
storm sewers, and into the ocean. As a result, our rivers and streams are usually not healthy places to
visit after a storm.
Leads to an increase in the intensity of Storm/Flood
events, increasing the flashiness of the system.
 Human Experiences with

Stormwater
 Flash flooding



Loss of Life
Destruction of infrastructure

 Public Health Concern



Beach / Lake closures
Bacterial / Viral infections

 Economic Losses



Loss of property
Loss of productivity

 Environmental Responses
 Erosion




Stream bank failure
Stream channel incision
Accelerated sedimentation of aquatic habitats

 Toxic Effects





Excessive algae growth
Oxygen Depletion/ Fish kills
Aquatic species contamination

 Habitat Loss


See above
Human Impacts from stormwater
Environmental Impacts from stormwater
Stormwater Management Requires
managing both:
 Stormwater Quality
 Remember, what sits on
the pavement often
makes its way to a
stream.




If it goes out your car
window, it often winds up
in a stream.

 Stormwater Quantity
 Increases in impervious
surfaces, increases
discharge volume.


Increases discharge
velocities, which increase
erosion rates.
Stwr100 wk1
Case Study and Discussion
 Is this a storm water problem?

Water Quality at the Lake of the Ozarks
Lake beach legislation still up in air
Measure would change how DNR tests, reports E.coli
bacteria
By Ceil Abbott
Sunday, May 5, 2013
Despite assurances to the contrary, state Rep. Rocky Miller says he still isn’t sure if the Missouri
Department of Natural Resources will change its policy on testing for E.coli bacteria at state
park beaches, before the beginning of the tourist season.
Now, I’m being told to just leave my bill attached to House Bill 881, and when it comes across
the governor’s desk, the DNR won’t object to the changes, and it will automatically become
law,” Miller, R-Tuscumbia, said last week.
Miller was referring to a bill he introduced in the Legislature last January. It would change the DNR’s policy on testing
for high E.coli levels at state park beaches, and for closing those beaches to the public when the readings from those
tests are elevated.
The House Tourism and Natural Resources Committee took testimony on his bill on Feb. 14, but never recommended
it for full House debate.
The House passed the second bill on April 25, and it’s scheduled to be heard Tuesday by the Senate’s
Commerce, Consumer Protection, Energy and the Environment Committee.
To become law, both houses of the Legislature must approve the same language on a bill before 6 p.m. Friday, and
the governor has to sign that bill.
Under the terms of Miller’s bill, the DNR would be required to use the Environmental Protection Agency’s Method
1603, or an equivalent method, to determine if E.coli bacterial levels at state park beaches are too high for public
safety.
The DNR would be required to take several samplings of the water at public beaches over a 30-day period. Then, if
the test results consistently exceed the EPA-established geometric mean standard for public safety, the DNR would
post a sign reading, “Swimming Not Recommended” rather than using “yellow crime scene tape” to close the
beach, Miller said.
Miller sought input from the DNR when writing the legislation, and his language reflected their recommendations.
He said he also received a promise from the DNR that the agency would change its testing policy to reflect safety
standards set by the federal government more directly.
Miller said he wrote the bill because “Missouri has the strictest standards for E.coli levels of any state in the
nation, and even exceeds the levels the EPA considers safe for public use.”
The Tuscumbia Republican said he had been contacted by a number of business owners and tourism organizations that
believe the DNR’s beach closure policy is damaging the economy in tourist areas.
Jim Divincen, Tri-County Lodging Association administrator, was one of the lake area representatives who expressed
concern about the effect of the DNR’s policy on the local economy. When the DNR closes a beach because of elevated
E.coli levels, it often gives visitors the idea that the water quality in the entire lake presents a health hazard, Divincen said.
“As important as it is that the method of testing be changed, it is equally important that the DNR change the way in which
it notifies the public of a beach closing,” Divincen said.
In March, Divincen and others testified before the House Committee on Tourism and Natural Resources in Jefferson City.
“The last lakewide sampling conducted on the Lake of the Ozarks, based on 285 samples from areas around the lake, has
proven scientifically that the Lake of the Ozarks is one of, if not, the cleanest bodies of water in the state, in terms of
bacteria.” Divincen said.
In mid-April, Miller said DNR personnel told him the testing policy would be changed and that signs would be used when a
beach was closed.
He was told the policy would be in effect before state park beaches open on Memorial Day weekend.
Bill Bryan, the DNR’s director of state parks, did not return phone calls seeking a comment for this story.

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Stwr100 wk1

  • 1. Week One 1. 2. 3. 4. Introduction to and review of hydrologic / watershed Concepts The Concept of Storm Water Management Human Experiences with Storm Water Storm Water and The Environment
  • 2. What is Stormwater Runoff? Think back to the water cycle…
  • 4.  STORMWATER simply refers to the various forms of precipitation… it’s the water from the storm.  STORMWATER RUNOFF, is the surface runoff of precipitation which has not infiltrated into ground or surface storage reservoirs.  Occurs  During or after the storm when PRECIPITATION in the form of rain or snowmelt flows over the ground as RUNOFF.  Because  The soil surface is incapable of absorbing more precipitation  The soil is already SATURATED  Or the ground surface is IMPERVIOUS Surface reservoirs are at their capacity 
  • 5. Where does stormwater runoff go?  All Storm Water falls within a WATERSHED.  A watershed is an area of land from which all rainfall drains to a common outlet point.  All land is a part of a watershed.  Watersheds can be very large--like that of the Mississippi River --or as small as a street or neighborhood.
  • 6. This diagram shows a watershed in a natural, undeveloped area. It is important to visualize the movement of water into and through the ground in addition to its movement across the surface in rivers and lakes
  • 7. In a natural watershed, water can infiltrate easily into the ground, and this groundwater is often available for later use by plants and people. Our area’s water supply still comes partly from pumped groundwater reserves. Pollutants in an undeveloped watershed do not become concentrated and are easily broken down by natural processes in the ecosystem (soil microbes and plants).
  • 8. Here are the main watersheds of the St. Louis Metropolitan Region Small, local watersheds are a part of larger watersheds. The River Des Peres and Dardenee Creek watersheds, Respectively are parts of the Middle Mississippi and Missouri River watersheds. Since all of the watersheds shown drain to the Gulf of Mexico, they are all parts of this much larger watershed.
  • 11. Why is stormwater runoff a problem?
  • 12. • Stormwater can pick up debris, chemicals, dirt, and other pollutants and deliver them to a storm sewer system or directly to a lake, stream, river, wetland, or coastal water. • Anything that enters a STORM SEWER system is DISCHARGED untreated into the waterbodies we use for swimming, fishing and providing drinking water.
  • 13. When stormwater falls on surfaces, it picks up and carries with it a wide variety of harmful pollutants. IMPERVIOUS • Impervious surfaces are areas covered with buildings or homes, streets and parking lots as opposed to ground surfaces (soil, grass, mulch, etc.) •The amount of impervious area has a direct relationship to the quantity of pollutants contained in stormwater runoff.
  • 14. Pollutants from our cars, lawns, and pets build up as they wash quickly across the pavements, into storm sewers, and into the ocean. As a result, our rivers and streams are usually not healthy places to visit after a storm.
  • 15. Leads to an increase in the intensity of Storm/Flood events, increasing the flashiness of the system.  Human Experiences with Stormwater  Flash flooding   Loss of Life Destruction of infrastructure  Public Health Concern   Beach / Lake closures Bacterial / Viral infections  Economic Losses   Loss of property Loss of productivity  Environmental Responses  Erosion    Stream bank failure Stream channel incision Accelerated sedimentation of aquatic habitats  Toxic Effects    Excessive algae growth Oxygen Depletion/ Fish kills Aquatic species contamination  Habitat Loss  See above
  • 16. Human Impacts from stormwater
  • 18. Stormwater Management Requires managing both:  Stormwater Quality  Remember, what sits on the pavement often makes its way to a stream.   If it goes out your car window, it often winds up in a stream.  Stormwater Quantity  Increases in impervious surfaces, increases discharge volume.  Increases discharge velocities, which increase erosion rates.
  • 20. Case Study and Discussion  Is this a storm water problem? Water Quality at the Lake of the Ozarks Lake beach legislation still up in air Measure would change how DNR tests, reports E.coli bacteria By Ceil Abbott Sunday, May 5, 2013 Despite assurances to the contrary, state Rep. Rocky Miller says he still isn’t sure if the Missouri Department of Natural Resources will change its policy on testing for E.coli bacteria at state park beaches, before the beginning of the tourist season. Now, I’m being told to just leave my bill attached to House Bill 881, and when it comes across the governor’s desk, the DNR won’t object to the changes, and it will automatically become law,” Miller, R-Tuscumbia, said last week.
  • 21. Miller was referring to a bill he introduced in the Legislature last January. It would change the DNR’s policy on testing for high E.coli levels at state park beaches, and for closing those beaches to the public when the readings from those tests are elevated. The House Tourism and Natural Resources Committee took testimony on his bill on Feb. 14, but never recommended it for full House debate. The House passed the second bill on April 25, and it’s scheduled to be heard Tuesday by the Senate’s Commerce, Consumer Protection, Energy and the Environment Committee. To become law, both houses of the Legislature must approve the same language on a bill before 6 p.m. Friday, and the governor has to sign that bill. Under the terms of Miller’s bill, the DNR would be required to use the Environmental Protection Agency’s Method 1603, or an equivalent method, to determine if E.coli bacterial levels at state park beaches are too high for public safety. The DNR would be required to take several samplings of the water at public beaches over a 30-day period. Then, if the test results consistently exceed the EPA-established geometric mean standard for public safety, the DNR would post a sign reading, “Swimming Not Recommended” rather than using “yellow crime scene tape” to close the beach, Miller said. Miller sought input from the DNR when writing the legislation, and his language reflected their recommendations. He said he also received a promise from the DNR that the agency would change its testing policy to reflect safety standards set by the federal government more directly. Miller said he wrote the bill because “Missouri has the strictest standards for E.coli levels of any state in the nation, and even exceeds the levels the EPA considers safe for public use.”
  • 22. The Tuscumbia Republican said he had been contacted by a number of business owners and tourism organizations that believe the DNR’s beach closure policy is damaging the economy in tourist areas. Jim Divincen, Tri-County Lodging Association administrator, was one of the lake area representatives who expressed concern about the effect of the DNR’s policy on the local economy. When the DNR closes a beach because of elevated E.coli levels, it often gives visitors the idea that the water quality in the entire lake presents a health hazard, Divincen said. “As important as it is that the method of testing be changed, it is equally important that the DNR change the way in which it notifies the public of a beach closing,” Divincen said. In March, Divincen and others testified before the House Committee on Tourism and Natural Resources in Jefferson City. “The last lakewide sampling conducted on the Lake of the Ozarks, based on 285 samples from areas around the lake, has proven scientifically that the Lake of the Ozarks is one of, if not, the cleanest bodies of water in the state, in terms of bacteria.” Divincen said. In mid-April, Miller said DNR personnel told him the testing policy would be changed and that signs would be used when a beach was closed. He was told the policy would be in effect before state park beaches open on Memorial Day weekend. Bill Bryan, the DNR’s director of state parks, did not return phone calls seeking a comment for this story.