Table 2: General Compatibility of Drainage Control
Techniques in Different Areas of a Slope

Compatibility

Drainage Goals:
Slope Crest
Modifications
Slope Face
Modifications
Slope Toe
Modifications
Increases Slope Stability:
Less water in/on slope
 
Decreases Slope Erosion
Environment Impact:
Potential improvement in water quality
Environment Impact:
Potential degradation in water quality
Environment Impact:
Significant ground surface disturbance
 
Relative low-cost construction
 
 
Relative low-impact construction
 
 
Reduces slope toe undercutting by waves
 
 
Drainage Systems:
Slope Crest
Modifications
Slope Face
Modifications
Slope Toe
Modifications
Teaching Systems:
Installation with heavy equipment
 
Relief Drains: Groundwater control
Strip Drains: Seepage control
 
 
Swales and Tightlines:
Surface and ground water control
Contour Wattling: Surface water control
Revegetation: Surface water control
Drainage Source Control:
Avoidance of flow concentrations
 
 
Additional Drainage Control Techniques

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