Rahulvai, What you are saying is, there are other samll rivers that can be mixed up in the same tunnel. Is that right? If so, are they colocated or is there esay way each of sub river can be mingled. I assume so but what about the size of TUNNEL . What I am seing in the photos is only some Scratch in the Terrain or mother land like ANTS are rambling around. Just a thought don't assume it as a personal for you. You look like the real Nepali Hero who is absolutely needed at this time. I could say you are the MAN of the match. GOD BLESS THIS PROJECT AND ALL WELL WISCHERS.