Environmental tracers and groundwater residence time indicators reveal controls of arsenic accumulation rates beneath a rapidly developing urban area in Patna, India

Laura A. Richards, Rupa Kumari, Neha Parashar, Arun Kumar, Chuanhe Lu, George Wilson, Dan Lapworth, Vahid J. Niasar, Ashok Ghosh, Biswajit Chakravorty, Stefan Krause, David A. Polya, Daren C. Gooddy