[permaculture] Access road run-off control strategies.

Antonio Scotti antonio.scotti at tiscali.es
Tue Dec 30 18:53:35 EST 2003


Hello Kelly & Rick,
> Rick's idea is great. Visualize one swale on each side of the road leading
> off of each "bar". The swales will be perpendicular (90 degrees) to the
road
> direction.

Unfortunately this won't be possible since I've got a cliff on one side of
the road and a steep slope up hill
on the other.

The road itself is not very steep, couldn't say how many degrees now, the
idea that you Kelly suggests below
could perhaps be useful with my original idea of having a drain on each side
of the road collecting the runoff.
Then if these drains have holes with plants along its lenght I could perhaps
slow down the runoff enough.
The drain could possibly have a hard bottom (stones?) to avoid further
erosion on the roadsides...but then it would be quite a job doing it!
Thanks for your feedback
and Happy 2004 to the list All.
Antonio

>
>
>  Also how can I could I
> > efficiently trap/filter the debris that are carryied along with the
water?
>
> Kind of depends on the type and volume of debris, but a small settling
pond
> or "pit" along the swale generally works well. Make the pit close-ish to
the
> road. Sediment and larger, heavier trash will go to the bottom of the pit.
> Grow a grass or other crop in the pit - the vegetation will trap more
debris
> and oils and greases from the road will absorb onto the leaves. Make the
> water pass over/through a small rock "dam/french drain" to get to the rest
> of the swale...this further filters the water and retains more trash
> including most "floatables" like plastics.
>
> have fun!
>
> ciao,
> Kelly
>
>
>
> --
> Kelly Finigan, M.Sc. P.Eng. Permaculture Designer
> ~ Sustainability consultant & ecological designer ~
>
> 744 - 4 Street NW
> Calgary, Alberta T2N 1P2
> phone 1-403-283-7270
>
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