Drainage Water Management with Surface Drainage Systems USDA is an Equal Opportunity Employer &...
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Drainage Water Drainage Water
Management Management
with with
Surface Drainage Surface Drainage SystemsSystems
USDA is an Equal Opportunity Employer & Provider
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Natural Resources Natural Resources Conservation Service Conservation Service
(NRCS)(NRCS)
Jerry D. Walker, P.E.Jerry D. Walker, P.E.
Agricultural Engineer (Water Management)Agricultural Engineer (Water Management)
Natural Resources Conservation ServiceNatural Resources Conservation Service
Central National Technology Support Center Central National Technology Support Center
Fort Worth, TXFort Worth, TX
USDA is an Equal Opportunity Employer & Provider
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DWM (554)- Surface SystemsDWM (554)- Surface Systems
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Flooded FieldFlooded Field
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Drop Structure for Field Drainage Drop Structure for Field Drainage
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Drainage control structures providing water table Drainage control structures providing water table control must be capable of passing surface runoff control must be capable of passing surface runoff
from storm events. from storm events.
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Terrace Design Tool Webinar, April 27, 2011
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Water Table Management AlternativesWater Table Management AlternativesParallel Field Drains – with Pipe Parallel Field Drains – with Pipe
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Field Layout of WTM System-PipeField Layout of WTM System-Pipe
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Water Table Management AlternativesWater Table Management AlternativesParallel Field DitchesParallel Field Ditches
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Field Layout of WTM System - Field Layout of WTM System - DitchesDitches
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Controlled DrainageControlled Drainage
Flashboard Riser Flashboard Riser Water Control Water Control
StructureStructure
Courtesy: Soil and Water Courtesy: Soil and Water Management NCSU, BAE DEPTManagement NCSU, BAE DEPT
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Mechanisms by which Controlled Mechanisms by which Controlled Drainage enhances water qualityDrainage enhances water qualityYield increaseYield increase
5 bu/ac corn equals 3.5 pounds 5 bu/ac corn equals 3.5 pounds additional N uptakeadditional N uptake
Reduced outflow volumeReduced outflow volume
Courtesy: Soil and Courtesy: Soil and Water Management Water Management NCSU, BAE DEPTNCSU, BAE DEPT
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Mechanisms by which Controlled Mechanisms by which Controlled Drainage enhances water qualityDrainage enhances water quality
Yield increaseReduced outflow volumeNeed rain to achieve expected outcome
Courtesy: Soil and Water Courtesy: Soil and Water Management NCSU, BAE Management NCSU, BAE DEPTDEPT
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Other conservation practices with Other conservation practices with potential water quality impactspotential water quality impacts
Constructed wetland (657)Constructed wetland (657)Pond (378)Pond (378)Diversion (362)Diversion (362)Structure for water control (587)Structure for water control (587)Underground outlet (620)Underground outlet (620)Water and sediment control Water and sediment control
basin (638)basin (638)
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Drainage ReferencesDrainage ReferencesNRCSNRCS
NEH, Section 16, Drainage of NEH, Section 16, Drainage of Agricultural LandAgricultural Land
NEH, Part 624, Chap. 10, Water NEH, Part 624, Chap. 10, Water Table ControlTable Control
EFH, Chap. 14, Water Management EFH, Chap. 14, Water Management (Drainage), (Drainage), (Subchapter E – Water (Subchapter E – Water Table Management)Table Management)
EFH, Chap.19, Hydrology Tools for EFH, Chap.19, Hydrology Tools for Wetland DeterminationWetland Determination
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Drainage References (cont)Drainage References (cont)University University
Soil and Water Management Soil and Water Management Group – NCSU BAE Dept: Group – NCSU BAE Dept: http://www.bae.ncsu.edu/soil_whttp://www.bae.ncsu.edu/soil_water/drainmod/index.htmlater/drainmod/index.html
Iowa, Illinois, Minnesota, and Iowa, Illinois, Minnesota, and Ohio Extension ProgramsOhio Extension Programs
ASABE - numerous technical ASABE - numerous technical papers on DWMpapers on DWM
Pipe Manufacturer LiteraturePipe Manufacturer Literature
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Next Presentation
Hamid FarahaniWrap-Up