Asking about Cooperation Between India and Germany on Namami Ganga Programme

Hello i am Tyas, a final year student who's currently doing a research for my thesis titled "Cooperation Between India and Germany on the Preservation of Ganga River 2016-2017".

I need data about how the cooperation going and how is the improvement of Ganga river condition before and after the cooperation. Also I need data about the Ganga River (what materials that polluted Ganga River, what India's government do to solve this, and so on).

Who I should ask about this? any of you knows about this or who should I ask to get this data?

Please help me I'm interested to do interview to ask several question about it.

Thank you