Citizen scientists monitor water quantity and quality in Kenya - Rufino, Mariana C.; Weeser, B.; Stenfert Kroese, J.; Njue, N.; Gräf, J.; Jacobs, S.; Kemboi, Z.; Ran, A.M.; Cerutti, P.O.; Martius, C.; Breuer, Lutz (Center for International Forestry Research, 2018)