Drainos?

[Akzle]

will any one on here admit to being a drain layer?

it's a tad wet out, had bout 190mm of rain, the week, you see.

so i'm diggin this elongated hole. trench like. reckon it'll drop the water table so as what's downhill wont be as moist underfoot eh?

my question for any drainos..
do i need to batter the uphill slope at all? is straight-up-an-down okay?

i'm not planning on laying drainflo or backfilling. this is the start of my moat.


also.. does anyone have any small crocodiles?

[jrandom]

Water will always, maddeningly, find the lowest spot one way or another. Physics is a cunt. If you're digging a drain you'll do well to stand back and carefully look at the lie of the land before you waste a whole lot of effort.

Rather than digging a trench across the side of the hill, maybe think more about creating an outflow from the low point at the bottom of it that's going boggy, so that the water can continue on through it and fuck off somewhere else.

[Subike]

The grass roots are holding the topsoil from running down the hill,
and the grass is liken to a rain coat on the top, allow the water to "wash" down the hill

The drain has now given the water access to the earth under the grass

dont be surprised if the downhill side of you hill is in the valley after a good shower

agree you should be looking at the lowest point of the muddiest area, and concentrating your drainage to their first.

[flyingcrocodile46]

Water will always, maddeningly, find the lowest spot one way or another. Physics is a cunt. If you're digging a drain you'll do well to stand back and carefully look at the lie of the land before you waste a whole lot of effort.

Rather than digging a trench across the side of the hill, maybe think more about creating an outflow from the low point at the bottom of it that's going boggy, so that the water can continue on through it and fuck off somewhere else.


Yup. Too late re the effort. as subike said.. (but more politely) digging a trench across the slope like that is a dumb move which will likely only result in saturating the down slope ground and accelerate the rate of ground creep.. or may even see it break into a gallop.

[Akzle]

the ground is saturated - well past holding point. any rain washes off anyhow. this cuts across a spur and is at a depth lower than the bit i want dry (off pic, to the right) one end drains to a natural gut with a watercourse below, the other out into a bog (over the hill, to the right)...

[JimO]

hope you cot a resource consent and notified local iwi

[Brian d marge]

Me dad did the same , ended up with a mini bog at the outflow end ....so as has been said ..
The outflow Idea, into a modified "watson wick " ( plants that love water )

Failing that a fk off bit of pvc , just under the surface , exiting on bit of "Higher ground" in front of, A; the neighbours driveway , or B; the shed the local kids wait in for the school bus or C; , into the local town drain , ...

not your fault it happens to flow down hill into the drain ,,,,

Stephen

edit sorry I see you have a bog already , then look at a watson wick .

[Akzle]

Me dad did the same , ended up with a mini bog at the outflow end ....so as has been said ..
The outflow Idea, into a modified "watson wick " ( plants that love water )

Failing that a fk off bit of pvc , just under the surface , exiting on bit of "Higher ground" in front of, A; the neighbours driveway , or B; the shed the local kids wait in for the school bus or C; , into the local town drain , ...

not your fault it happens to flow down hill into the drain ,,,,

Stephen

edit sorry I see you have a bog already , then look at a watson wick .

yup. lots of plants going in. trying to find endemic harakeke species.

and. if i was begging the council for resource consent, surely the iwi wouldn't get a say, as i woud be accepting the councils claim as legitimate to rule on matters of the land.

but back to the main.
is there anyone who is a drainlayer, by trade or habit, that can advice if i should cut the uphill side of this at an angle..?

[Maha]

hope you cot a resource consent and notified local iwi

Thats only if he digs to deep and finds oil...or an historic kumara patch, which is more likely in Northland.

[slofox]

I have the same problem (living at the bottom of a hill). But I haven't had the energy to do anything about it, being a lazy cunt. BUT. I would stick novaflow or somesuch into the hole to stop that downhill side effect that others have mentioned.

[carburator]

given that its only a spade trench ( the ones we dig you lose cars in ) tapering the leading and trailing edege of the
trench will lessen it filling itself in..

personally id get a chain trencher and run a couple of cuts and back fill it with rotten rock and elepahants cock in a sock
for a more effective long term solution..

267527

p.s. thats novaflow pipe with a mudsock over it as over time in dirt in self fills, even if you lay it in a bed of rotten rock ( slag )
and cover and then put a layer of mud cloth over it before back filling with dirt is good..

[The Lone Rider]

Did you know ****** drainflo is made from about 25-50% scrap polyethylene (and usually out of regrind scrap too poor to use in other product), with around 10% calcium carbonate material used simply to bulk it up.

The scrap made punching the little holes gets reconstituted and ultimately fed back into it.

Takes about 2-14 minutes to make one coil depending on it's size.

Suckers cost up to $1000 a coil though!

[Nova.]

what you need is a swale, see: http://en.wikipedia.org/wiki/Swale_%28landform%29

http://redac.eng.usm.my/html/photo%20album/2003/03031416Langkawi/swale%20did%20langkawi.jpg

[Akzle]

i don't really want to backfill, or i wouldn't have dug as wide. as i said. eventually i'll continueit around the property and fill it with crocodiles or piranha. i'm also on a slope, about 100m above sea level. natural "swales" exist heading into/ through the "bog"

my end goal, really is to dry out the knob on this spur so as i'm not slip-sliding away...