Chana-Tarkari Sir, Three to four months are dominated by monsoon. So they might fall in the categories of wet month. But this does not imply that the rest of the season is dry. Rainfall frequency is low but runoff is still significant. I could not be sure on 100-3000 mt, but first 300 mt is dominated by clay that has low conductivity. Slow infiltration is much more reliable for filtration. My point on dheungedhara was directed more towards preserving whatever we are left with at this moment. Reviving Sundhara looks next impossible but we still can protect Patan’s. Ya surely I did not have much chance to work...couple of projects...hydrological analysis of Bagmati river basin and Rainwater harvesting in the valley...chana tarkari khadai jagire bhara gareko kaam...catch you next week...