HELP - does anyone know anything about land drainage?

[lauraheads]

I have to teach a lesson on it

Any help would be useful, I have the basic lecture. I could just do with interesting facts/websites or even books!!

Thanks

 

[LindaW]

I remember from putting in our school, a few of the areana specialsit sites had diagrams of drainage

 

[lachlanandmarcus]

also if you look online at local councils planning applications, if you find an for a big agric barn, they often have drainage plans attached which are quite detailed for reference.