Browse Forums Landscape & Garden Design 1 Oct 11, 2010 10:10 am Hi all, Frontyard: What options do we have to collect and channel the water away from the house (in the cut section) where it pools against the slab whenever it rains? We have a charged system (: and no stormwater pipes at all on our site Frontyard is about 100mm higher than the kerb level. Cut is at the front, about 350mm cut. Fill is at the back, also about 350 fill. Backyard: What do we do with water collected behid the retaining wall at the back when there are no stormwater pipes? Here's a pic to give a general idea of the site slope at the back: Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Thanks for your input! My signature is distracting people from my wise posts ... Re: Site drainage / Surface drainage 3Oct 11, 2010 12:04 pm Thanks, keen ... Well, all our expert landscapers and concretors so far were a bit confused, some even didn't offer any solution at all. Some were concerned about money (that they would need to charge us some 1-1.5k for providing a pipe to channel the water into the street gutter - so they were proposing nothing rather than what we suggested)! Who should we call to advise on a proper solution? My signature is distracting people from my wise posts ... Re: Site drainage / Surface drainage 4Oct 11, 2010 12:24 pm Need more info. You are not allowed to run site stormwater onto council drainage and anyway it is better to deal with it yourself I believe. Do you have a contour plan? How about a drainage cell buried under the paving which ag pipe behind the wall runs to? By charged system I assume you mean all roof drainage runs to tanks ? Did you check out paving expert, there is everything about paving & drainage in there, it is a huge resource. Re: Site drainage / Surface drainage 5Oct 11, 2010 12:39 pm Yes, had a quick look at paving expert but it is a huge resource and will need time not just to read it, but to try to really try to process it and link to our situation. Yes for charged system ... Yes for contour plan too ... I could pm it to you later if you have the time to look ... Yes for storm water ... we understand that only "authorised" contractors (I suppose plumbers??) are allowed to play with pipes and storm water. But our contractors were not too concerned, one guy is even happy to dig a trench, put new pipe and connect it to an old pipe (possibly no longer functioning due to the knockdown) whihc is on nature strip and runs into kerb gutter - and that way move out our frontyard surface water. Not sure about tapping into the tank overflow pipe ... but some said they will (or maybe they would get a plumber to do it for them ). How about a drainage cell buried under the paving which ag pipe behind the wall runs to? I firstly need to investigate what a drainage cell is My signature is distracting people from my wise posts ... Re: Site drainage / Surface drainage 6Oct 11, 2010 4:04 pm Depending on your local council a pit with a automatic submersible pump which would pump to the street may be an option Landscape Design & Construction http://cherub.squarespace.com/ Re: Site drainage / Surface drainage 8Oct 11, 2010 8:31 pm There is also the prospect of using the drainage cubes under there or under the turf area below There is a website there somewhere showing a massive Sydney job. They more or less construct a underground water tank where water can then be used to irrigate or flush dunnies. Re: Site drainage / Surface drainage 9Oct 11, 2010 9:08 pm Perhaps that could be the solution for the backyard ... to have a drainage pit at each end of the retaining wall in the picture, some 1m away from the wall in the turf? The ends of the ag pipe behind the wall would be going directly into their own pits? Would heavy clay interfere with efficacy of this? I suppose it's lucky there is a natural fall to the back all the way. My signature is distracting people from my wise posts ... Re: Site drainage / Surface drainage 10Oct 12, 2010 5:22 am You need to check with your council, some wont let you install the drainage pits but rather you remove water to approved system Landscape Design & Construction http://cherub.squarespace.com/ Re: Site drainage / Surface drainage 11Oct 16, 2010 1:55 am Hey Lex. The only way to move water away from an area, is to get it to a lower point. As water will always travel in the direction of least resistance. So you have to use either drainage pipe or make a natural slope and possibly have a pit or a soakwell. There is really no other way to do it. If i were you i'd get some AG run it away to a un used spot and make a soak pit like Fu is saying. Costa's garden odyssey did a whole bit on fixing drainage on a house. You would find it very useful. Re: Site drainage / Surface drainage 12Oct 16, 2010 6:44 pm Oh thanks oohsam ... just searched and found 2 eps which could be useful. I always thought this guy is great, if only I had more time to occasionally watch TV!! Anyway, there is so much to learn in an instant! And then I have to apply it in real life ... All that, and not a chance for even a quick system testing (and bug fixing!) My signature is distracting people from my wise posts ... Re: Site drainage / Surface drainage 14Oct 16, 2010 9:35 pm Are you? ... Now I see how tough it is for builders and similar professions ... well, at least for those who only like to do a quality job ! Anyway, was wondering what type of retaining wall is the strongest ... what about a concrete wall ? Or besser blocks core filled with concrete?? Or is a link block wall equally as good? My signature is distracting people from my wise posts ... Re: Site drainage / Surface drainage 16Oct 16, 2010 10:24 pm Lex, here is the link to soakwells (soakaways in UK) from paving expert. http://www.pavingexpert.com/drain08.html There are links to more info if you need it. There really is no better practical info available for the layman. paving expert is a huge, first rate resource. Use it and you will answer all of your own questions! Re: Site drainage / Surface drainage 17Oct 17, 2010 6:36 am Cheers, guys! I did start reading the Paving Expert site ... trouble is that there is so much info that I forget quickly and in the end I only remember small segments and especially those that were already aligned with my own opinion ! Anyway, I guess the main idea is to get the water from higher points to lower points, but so that it can either drain away into street gutter or into backyard. However, when draining into backyard, there are dividing opinions - those who say we need a pit at each side of the backyard retaining wall and those who say that we don't, that the water would just dissappear under the grass. The other thing I am unsure of is this - how the ag pipe actually works!?!?! It's slotted, so supposedly the slots are there to let the water in. The shape of pipe (a tube) then just "carries the water to the lowest point". But, if the pipe is slotted, doesn't it equally let the water out right away?!?! I suppose placing the pipe on firm hard ground and putting loose gravel/stones on top of it indeed does the trick!?? My signature is distracting people from my wise posts ... Re: Site drainage / Surface drainage 18Oct 17, 2010 7:15 pm Have a browse through these products. These are available for domestic use but many of the examples are on a very large scale. http://www.globalsynthetics.com.au/prod ... ainage.php It will be neat but you won't have much freeboard. At least they are not weep holes. Are you in a high intensity rainfall region? The regulatory slope is only required… 3 8276 You can wash over existing pavers with 10% solution of water and hydrochloric acid, then wash off. The acid will provide for required bond key with new concrete. 1 36963 |