Build your own Thai road drainage
Now most of us don't own enough land to warrant drainage on this scale but it maybe ok for mobi at his mobi mansion.
Anyway first off you need a big long ditch, this has to slope the way you want the water to go, preferably away from your land and house and towards somebody elses, the local Thai government officials will normally aim the drainage towards poorer areas and let them flood so you don't really want to be in one of them.
Next you need big concrete rings like these, size will depend on how much water you need to get rid of and how quickly.
https://teakdoor.com/Gallery/albums/u...ding_roads.JPG
These you just chuck in your ditch, a bit of cement between joins and your off to a good start.
Box Culverts are needed every now and again for the rain water to be able to drain into your concrete pipes, these also allow access for rats, snakes, dirt and rubbish, they also make great breeding grounds for cockroaches and mossies, generally between rainy seasons these will actually fill up with rubbish and dirt that the first major rains will flood the area, your local city hall will act shocked and amazed and vow it will never happen again, well until next year anyway.
https://teakdoor.com/Gallery/albums/u...drainage_7.JPG
Here's How They Do It In Korat
https://teakdoor.com/Gallery/albums/u.../drainage1.jpg
This road floods horribly every time there's a little rain. Over the last couple of years many "fixes" have been put in place; all inadequate. Of course, no one thinks about it until it does rain. So, these poor workers are trying to build a drainage ditch while the thing is flooded.
https://teakdoor.com/Gallery/albums/u.../drainage2.jpg
No fun to work here. The ditch was full when I ran by this morning, but it looks like they managed to pump some out to get the work done.
https://teakdoor.com/Gallery/albums/u.../drainage3.jpg
Not far away, but on a more main road is this persistent flood. I normally run through this area, but abandon when it's knee deep like this. On the left you can see a drainage that was put in about a year ago. It can't handle the volume of flood water.
https://teakdoor.com/Gallery/albums/u.../drainage4.jpg
The whole problem is caused by the moo baan you can see in the back to the left. It was built right over a major wetland drainage area with no thought to somehow diverting the water. As a result, it is concentrated in this area where it spills across the road.
https://teakdoor.com/Gallery/albums/u.../drainage5.jpg
Much of it just goes over the road an in to this natural channel on the other side. But, the owner of this land has pretty well blocked it up, so most of the water turns left and flows down the road. It seems to me they should build a culvert under the road at this point and let the water flow down the way it's been flowing for probably hundreds of years. (At least until the moo baan was built.)
https://teakdoor.com/Gallery/albums/u.../drainage6.jpg
Looking back the other way. Moo baan on the left, natural stream bed on the right.