(EnergyAsia, March 9 2010, Tuesday) — Sri Lanka’s publicly listed Hemas Power said it has bought a 2.6 megawatt (MW) hydropower plant in the Nuwara Eliya district from Senok Mark Hydro for 198.5 million rupees. (US$1=115 rupees).   In a filing with the local stock exchange, Hemas Power said it bought 9.92 million shares or…