The effects of human land use on flow regime and water chemistry of headwater streams in the highlands of ChiapasM.M. Castillo, H. Morales, E. Valencia, J.J. Morales and J.J. Cruz-MottaKnowl. Managt. Aquatic Ecosyst., 407 (2012) 09DOI: https://doi.org/10.1051/kmae/2013035