Surface and Sub-Surface Drainage Design and Construction
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Surface and Sub-Surface Drainage Design and Construction
- 1. SURFACE DRAINAGESURFACE DRAINAGE Natural Channel CrossingsNatural Channel Crossings CulvertsCulverts Low-Water CrossingsLow-Water Crossings BridgesBridges Surface DrainageSurface Drainage Sub-Surface DrainageSub-Surface Drainage Meadow CrossingsMeadow Crossings
- 3. Photo: USDA Forest Service
- 16. Outlets/Inlets
- 17. USFS
- 34. USFS
- 40. Ditches
- 64. Photo: Gordon R Keller
- 73. USFS
- 79. Switchbacks
- 81. Steep Grades
- 90. Over-Side Drains
- 94. Meadow Crossings
- 99. Corduroy Road
- 103. Underdrains
- 108. Filter Blanket
- 112. Pay Attention to Drainage Detail
Hinweis der Redaktion
- Here we can see muddy water being collected in the road, concentrated, and flowing down wheel ruts in the road.
- The crown in the center of the road devides the runoff and shortens the distance water needs to travel on the road surface. Crown roads are suitable for slippery conditions. Require the largest amount of disturbance (footprint) and are the most expensive to construct and maintain.
- Leadouts are most common draining ditches along either insloped or crowned roads on low-sloping ground. They are commonly constructed with a dozer turning the ditch out into the surrounding slopes.