Strip drains are thin rectangular conduits which can be
placed into narrow 4 inches trenches which minimize the degree
of disturbance to the slope soils and vegetation. Typical
dimensions range from one to two inches wide to 8 to 12 inches
high and are pre-wrapped with a geotextile. The strips are used
like relief drains described earlier. However, they address low
volume flows like groundwater seepage issues. There are
fabricated end connections which convert the rectangular drain
to conventional circular pipe dimensions. Figure 14 shows a
strip drain in a trench.
|Figure 14. Strip drain system.
Limited flow capacity. Must be installed across a slope
contour instead of down a slope.
Easy to get material rolls onto the slope. Limits the degree
of slope disturbance to soil structure and vegetation root
systems. Good in highly variably, disturbed areas with limited
Not commonly available at the discount centers. Must call
pipe supply center.