The financial and infrastructure support from the Ministry of Environment and Forests (Government of India) and Karnataka Power Corporation Limited (Karnataka Government) and Indian Institute of Science is acknowledged. We thank Mr.M.S.Reddy for his help in field work and samples analyses. We are also grateful to Mr.Srikantha, Mr.Lakshminarayana and Mr. Vishnu for their support during field sample collections. We thank Ms.Ahalya and Mr.Sanjeev N.K. for suggestions and help in literature review.
