[Kasperspirit]

hi...

I hope i havent put this in the wrong section.
If so, plz some mod move it.

Anyway...
i am making my thesis design and it requires that we dig a trench from the river and make an artifical lake that branches in many directions somewhere in the forest.
I am looking for the technique how to do this lake with information of steps to follow so the river bank doesnt collapse and so that water doesnt infiltrate much to the deep because near this place is an archeological site and monuments must be far from water.

Can anyone help me with this.
thanks...