Low Impact Development (LID) in a Combined Sewer Overflow ...
County Low Impact Development (LID) Outreach
description
Transcript of County Low Impact Development (LID) Outreach
![Page 1: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/1.jpg)
County County Low Impact Development Low Impact Development
(LID) (LID) OutreachOutreach
BRIAN LEADERS, RLABRIAN LEADERS, RLAREGISTERED LANDSCAPE ARCHITECTREGISTERED LANDSCAPE ARCHITECT
![Page 2: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/2.jpg)
Discussion Topics Discussion Topics ______________________________________________________________________________________________
What is a watershed?What is a watershed? Why we need a Stormwater Management Why we need a Stormwater Management
OrdinanceOrdinance Problems caused by not having a PlanProblems caused by not having a Plan Urban Conservation ProblemsUrban Conservation Problems EPA “Today”EPA “Today” BMP’s (Best Management Practices)BMP’s (Best Management Practices) Iowa DNRIowa DNR
![Page 3: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/3.jpg)
What is a Watershed?What is a Watershed?
![Page 4: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/4.jpg)
A watershed is a geographic A watershed is a geographic area from which water drains area from which water drains
toward a toward a commoncommon watercourse (such as a lake, watercourse (such as a lake, stream or ocean) in a natural stream or ocean) in a natural
basin. basin.
![Page 5: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/5.jpg)
![Page 6: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/6.jpg)
When thinking of a watershed When thinking of a watershed do not just think of water, do not just think of water,
include land, include land, landuselanduse, , topography, geology etc. All of topography, geology etc. All of
these components affect these components affect watersheds. watersheds.
![Page 7: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/7.jpg)
Why do we need a Why do we need a Stormwater Management Stormwater Management
Ordinance?Ordinance?
![Page 8: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/8.jpg)
This is what we are seeing now!This is what we are seeing now!
![Page 9: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/9.jpg)
![Page 10: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/10.jpg)
![Page 11: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/11.jpg)
![Page 12: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/12.jpg)
![Page 13: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/13.jpg)
Yes this is a paved street!Yes this is a paved street!
![Page 14: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/14.jpg)
What problems are causedWhat problems are caused by not having a by not having a
Stormwater Management Stormwater Management Plan?Plan?
![Page 15: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/15.jpg)
Watershed Hydrology BEFORE DevelopmentWatershed Hydrology BEFORE Development
evapotranspiration: 40-50%
interflow: 20-30%
surface runoff: <1%
www.psat.wa.gov/Programs/LID.htm
![Page 16: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/16.jpg)
Watershed Hydrology AFTER DevelopmentWatershed Hydrology AFTER Development
evapotranspiration: ~25%
interflow: 0-30%
surface runoff: ~30%
www.psat.wa.gov/Programs/LID.htm
![Page 17: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/17.jpg)
Urban Conservation Problems Urban Conservation Problems ______________________________________________________________________
![Page 18: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/18.jpg)
Urban Conservation Problems Urban Conservation Problems ____________________________________________________________________ 10 to 20 times higher erosion than agriculture10 to 20 times higher erosion than agriculture
![Page 19: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/19.jpg)
Urban Conservation Problems Urban Conservation Problems ______________________________________________________________________ Storm water runoff is carrying Storm water runoff is carrying high concentration of high concentration of
pollutantspollutants directly into creeks, stream and river. directly into creeks, stream and river.
![Page 20: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/20.jpg)
Urban Conservation Problems Urban Conservation Problems ______________________________________________________________________ Developing in the fragile loess soils Developing in the fragile loess soils
![Page 21: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/21.jpg)
Urban Conservation Problems Urban Conservation Problems ______________________________________________________________________ Rural vs. urban conflictsRural vs. urban conflicts
![Page 22: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/22.jpg)
EPAEPAand and
Effluent Discharge LimitsEffluent Discharge Limits
![Page 23: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/23.jpg)
Effluent Limitation GuidelinesEffluent Limitation Guidelines(ELG’s)(ELG’s)
______________________________________________________________________________________________
On December 1, 2009, the U.S. On December 1, 2009, the U.S. Environmental Protection Agency (EPA) Environmental Protection Agency (EPA) released effluent limits on stormwater released effluent limits on stormwater dischargesdischarges from many construction and from many construction and development sites (the Construction Rule). development sites (the Construction Rule). (74 Fed. Reg. 62,996)(74 Fed. Reg. 62,996)11
![Page 24: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/24.jpg)
The Construction Rule became effective The Construction Rule became effective February 1, 2010, and imposes the February 1, 2010, and imposes the following general requirements:following general requirements:
__________________________________________________________________________________________________________________________________________________________________
1)1) Non-numericNon-numeric limitations apply to construction limitations apply to construction activity that disturbs activity that disturbs one or more acres;one or more acres;
2)2) Beginning August 2, 2011Beginning August 2, 2011, a numeric turbidity , a numeric turbidity limit and related monitoring requirements will limit and related monitoring requirements will apply to construction apply to construction activity that disturbs 20 or activity that disturbs 20 or more acres at one time;more acres at one time;
![Page 25: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/25.jpg)
Numeric TurbidityNumeric Turbidity______________________________________________________________________________________________
20 32 50 110 178 345 412
EPA’s Numeric Turbidity Limit is 280.
![Page 26: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/26.jpg)
3) 3) No later than February 2, 2014No later than February 2, 2014, the numeric , the numeric turbidity limit will apply to projects that disturbs turbidity limit will apply to projects that disturbs 10 or more acres.10 or more acres.
![Page 27: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/27.jpg)
EPA’s EPA’s Main GoalsMain Goals
____________________________________________________________________________________________________________
Preserve and improve Preserve and improve water qualitywater quality on a on a national scale.national scale.
Reduce sediment dischargedReduce sediment discharged from from construction sites by construction sites by four billion pounds four billion pounds each year.each year.
![Page 28: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/28.jpg)
Effective Controls and Required Effective Controls and Required BMP’sBMP’s
________________________________________________________________________________________________________________
Controls are considered Controls are considered EffectiveEffective When: When:
“…“…bare soil is uniformly and evenly coveredbare soil is uniformly and evenly covered with vegetation or other suitable materials, with vegetation or other suitable materials, storm water is controlled so that rills or storm water is controlled so that rills or gullies are not visible and channels or gullies are not visible and channels or stream banks are stream banks are not erodednot eroded. .
![Page 29: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/29.jpg)
Selecting temporarySelecting temporary BMP’S BMP’S
(Best Management Practices)(Best Management Practices) for you!for you!
![Page 30: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/30.jpg)
Down Gradient Perimeter Down Gradient Perimeter ControlControl
________________________________________________________________________________________________
![Page 31: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/31.jpg)
Ditch ChecksDitch Checks______________________________________________________________________________________________
![Page 32: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/32.jpg)
Channel ProtectionChannel Protection______________________________________________________________________________________________
![Page 33: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/33.jpg)
Temporary PondingTemporary Ponding______________________________________________________________________________________________
![Page 34: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/34.jpg)
Construction PhasingConstruction Phasing______________________________________________________________________________________________
![Page 35: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/35.jpg)
Access ProtectionAccess Protection______________________________________________________________________________________________
![Page 36: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/36.jpg)
Inlet ProtectionInlet Protection______________________________________________________________________________________________
![Page 37: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/37.jpg)
Temporary Cover & ProtectionTemporary Cover & Protection______________________________________________________________________________________________
![Page 38: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/38.jpg)
Spoil and Stockpile AreasSpoil and Stockpile Areas______________________________________________________________________________________________
![Page 39: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/39.jpg)
Selecting permanentSelecting permanent BMP’S BMP’S
(Best Management Practices)(Best Management Practices) for you!for you!
![Page 40: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/40.jpg)
Rain GardenRain Garden______________________________________________________________________________________________
![Page 41: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/41.jpg)
Infiltration BermInfiltration Berm______________________________________________________________________________________________
![Page 42: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/42.jpg)
Soil TestingSoil TestingInfiltration and EmbankmentInfiltration and Embankment______________________________________________________________________________________________
![Page 43: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/43.jpg)
Sand FiltersSand Filters______________________________________________________________________________________________
![Page 44: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/44.jpg)
Dry Detention Dry Detention ______________________________________________________________________________________________
![Page 45: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/45.jpg)
Wet Detention Wet Detention ______________________________________________________________________________________________
![Page 46: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/46.jpg)
Constructed Wetlands Constructed Wetlands ______________________________________________________________________________________________
![Page 47: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/47.jpg)
Grassed Swales Grassed Swales ______________________________________________________________________________________________
![Page 48: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/48.jpg)
Dry and Wet Swales Dry and Wet Swales ______________________________________________________________________________________________
![Page 49: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/49.jpg)
Grassed Vegetated Grassed Vegetated Filter Strips Filter Strips ______________________________________________________________________________________________
![Page 50: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/50.jpg)
Pervious Pavement Pervious Pavement ______________________________________________________________________________________________
![Page 51: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/51.jpg)
Open Channel Flow Open Channel Flow ______________________________________________________________________________________________
![Page 52: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/52.jpg)
Iowa Senate File Bills Iowa Senate File Bills ______________________________________________________________________________________________
Working on an act related to Working on an act related to flood plain management.flood plain management.
![Page 53: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/53.jpg)
In a nut shell… In a nut shell… ______________________________________________________________________________________________
Prohibit the reconstruction of structures and Prohibit the reconstruction of structures and infrastructureinfrastructure substantially damaged by floods in a substantially damaged by floods in a floodway.floodway.
Limit reconstruction or new construction in a flood plain.Limit reconstruction or new construction in a flood plain. Require new construction of facilities Require new construction of facilities critical for health critical for health
and safety of the public and the environmentand safety of the public and the environment to be to be located in areas that are not flood plains whenever located in areas that are not flood plains whenever practicable.practicable.
![Page 54: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/54.jpg)
In a nut shell… In a nut shell… ______________________________________________________________________________________________
Conduct a subsurface tiling studyConduct a subsurface tiling study to determine the to determine the impact that tile drainage has impact that tile drainage has on infiltration, surface on infiltration, surface runoff, and flooding.runoff, and flooding.
Evaluate the feasibility of seasonal retention of water Evaluate the feasibility of seasonal retention of water in in
tile drained fields as a drainage management strategy.tile drained fields as a drainage management strategy.
Integrate multipurpose wetlandsIntegrate multipurpose wetlands into watersheds. into watersheds.
![Page 55: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/55.jpg)
In a nut shell… In a nut shell… ______________________________________________________________________________________________
DNR will seek funding to plan, implement, and monitor a DNR will seek funding to plan, implement, and monitor a watershed demonstration pilot project watershed demonstration pilot project for urban and rural for urban and rural areas involving a twelve=digit hydrologic unit code areas involving a twelve=digit hydrologic unit code subwatershed as defined by the United States geological subwatershed as defined by the United States geological survey. survey.
![Page 56: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/56.jpg)
In a nut shell… In a nut shell… ____________________________________________________________________________________________IOWA DNR WILL CONDUCT A STUDY PROJECT THATIOWA DNR WILL CONDUCT A STUDY PROJECT THATSHALL INCLUDE FEATURES THAT SEEK TO DO THESHALL INCLUDE FEATURES THAT SEEK TO DO THEFOLLOWING:FOLLOWING:
11. Maximize soil water holding capacity. Maximize soil water holding capacity from rain. from rain. 2. 2. Minimize severe scour erosion Minimize severe scour erosion and sand depositionand sand deposition during floods. during floods. 3. 3. Manage water runoff in uplandsManage water runoff in uplands under saturated soil under saturated soil moisture conditions.moisture conditions. 4. 4. Reduce and mitigateReduce and mitigate structural and nonstructural structural and nonstructural floodflood damage.damage.
![Page 57: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/57.jpg)
In a nut shell… In a nut shell… ______________________________________________________________________________________________ DNR will change DNR will change climate criteria climate criteria due to due to
weather changes. weather changes. Adopt minimum storm water standards Adopt minimum storm water standards to to
be implemented be implemented July 1,2011 July 1,2011 to limit:to limit:
1.1. Limit water runoffLimit water runoff2.2. Reduce potential future flood damageReduce potential future flood damage3.3. Assess effects of stream channelizationAssess effects of stream channelization4.4. Improve watershed management for both water quantity Improve watershed management for both water quantity
and quality.and quality.
![Page 58: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/58.jpg)
In a nut shell… In a nut shell… ______________________________________________________________________________________________
Modify Modify NPDESNPDES permits permits to require the mitigation of to require the mitigation of soil soil compaction and replacement of topsoilcompaction and replacement of topsoil as part of the as part of the completion of construction for permitted actions completion of construction for permitted actions involving involving one or more acresone or more acres of disturbed land. of disturbed land.
![Page 59: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/59.jpg)
Stormwater Management is Stormwater Management is here.here.
![Page 60: County Low Impact Development (LID) Outreach](https://reader035.fdocuments.net/reader035/viewer/2022070418/56815a0c550346895dc7587a/html5/thumbnails/60.jpg)
Questions? Questions? ______________________________________________________________________________________________Special thanks to the following sources:Special thanks to the following sources:
Mike Isensee CPESC, Urban ConservationistMike Isensee CPESC, Urban Conservationist Farmington, MinnesotaFarmington, Minnesota
Blayne W. Renner, NPDES Stormwater CoordinatorBlayne W. Renner, NPDES Stormwater Coordinator
Iowa Department of Ag. And Land StewardshipIowa Department of Ag. And Land Stewardship
Natural Resource Conservation ServicesNatural Resource Conservation Services
--______________________________________________________________________________________________________________________________BRIAN LEADERS, RLA BRIAN LEADERS, RLA REGISTERED LANDSCAPE ARCHITECTREGISTERED LANDSCAPE ARCHITECT25966 ROSEWOOD ROAD25966 ROSEWOOD ROADUNDERWOOD, IOWA 51576UNDERWOOD, IOWA 51576402-670-9700402-670-9700