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2015 Overholt Drainage School
2015 Overholt Drainage School March 16-20, Defiance County, Proposed 5-day Program Subsurface Drainage: Design, Layout and Installation; Benefits and Impacts Drainage Water Management (Controlled Drainage) Design, Layout, Installation, and Management Water Table Management w/Subirrigation: Design Concepts, Operation, Management, Benefits Drainage Water Harvesting, Water for Agriculture Larry C. Brown, 614-292-3826 [email protected] Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 SUBSURFACE DRAIN DESIGN PROCEDURE Paul Chester, Mark Seger USDA-NRCS, ODNR-DSWR 1 of 18 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 2 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 1. Topo Survey CONTOUR MAP Problem #4 1200' x x Farmstead 1 Acre x Trees Ditch Bottom 1000' SSD Design Procedure 200 100 200 400 2 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 3 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 2. Contour Map SSD Design Procedure 3 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 4 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 3. Soil Type SSD Design Procedure 4 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 5 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 4. Drain Spacing SSD Design Procedure 5 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 6 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 5. Layout Alternatives SSD Design Procedure 6 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 7 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE 950' Main 1 • 6. Layout & Station 1200' x x 600' 1 Acre 0+ 00 Farmstead x Ditch Bottom Trees 1000' Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 8 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 7. Plot Profile SSD Design Procedure 8 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 9 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 7. Plot Profile SSD Design Procedure 9 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 10 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 8. Control Points • a) Low points • b) High Points • c) Outlet • d) Laterals • e) Obstructions • f) Wetlands SSD Design Procedure 10 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 11 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 9. Set Main Gradelines – Start with outlet elevation – Based upon previous designs – choose main size – Keep cover – Keep lateral cover SSD Design Procedure 11 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 12 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 9. Gradelines • a) Round off • b) Station/Elev. SSD Design Procedure 12 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 13 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 10. Drainage Area SSD Design Procedure 13 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 14 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 11. Drainage Coefficient F IE L D CROPS TRUCK CROPS M in e r a l 3 /8 to ½ ½ to ¾ O r g a n ic ½ to ¾ S O IL SSD Design Procedure ¾ to 1 ½ 14 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 15 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 12. Capacity At Outlet SSD Design Procedure 15 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 16 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 13. Outlet • Pipe • Material SSD Design Procedure 16 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 17 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 14. Outlet Pipe Size SSD Design Procedure 17 Vermont Drainage Workshop 1/19/15 Larry C. Brown [email protected] 1-614-292-3826 18 of 18 SUBSURFACE DRAIN DESIGN PROCEDURE • 15. Main Design • a) Upper Main Size • b) Main Capacity • c) Lat. Flow Area • d) Lat. Contribution • e) Sum Lat. Flow • f) Note Flow & D.A. • • • • g) Note Stations h) Est. Main Size i) Main Capacity j) Cap. Available • 16. Repeat 15c - 15j SSD Design Procedure 18