Problem Drainage Technique Identification

Now that you have identified the general drainage characteristics of your property, it is important to get an idea of whether you should consider your drainage observations as problematic to slope stability and erosion control. If you note any changes in your slope geometry or surface characteristics during wet weather, it is very likely that drainage is driving the failure.

Consequently, it is important to know the initial condition of your property in order to assess any changes. Should you have concerns, get some technical assistance. Once you've identified problem areas, appropriate drainage techniques in the table below can be reviewed which may address your drainage problem. One or more of these techniques can be chosen to make up your drainage system. Also refer to the section on drainage systems for more details.

Drainage Characteristic
Drainage Technique Shallow groundwater less than 10 feet below slope crest Deep groundwater more than 10 feet below slope crest Surface water
Groundwater Interceptor Drains
Relief Drains (Tile Drains)
Strip Drains
Interceptor Swales
Stormwater Detention Storage
Slope Drains (Tightlines)
Additional Drainage Control (Horizontal Drains, Well Systems, Drainage Blankets)
Contour Wattling
Slope Toe Drainage Control
Erosion Control Techniques
Source Control

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