1. Facultad de Geología, Geofísica y Minas, Universidad Nacional de San Agustín de Arequipa, Arequipa 04001, Peru
2. Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401, USA
3. Intergubernamental Hydrological Programme, United Nations Educational, Scientific, and Cultural Organization (UNESCO), Montevideo 11200, Uruguay
4. Facultad de Ingeniería de Procesos, Universidad Nacional de San Agustín de Arequipa, Arequipa 04001, Peru
5. Facultad de Ciencias Naturales y Formales, Universidad Nacional de San Agustín de Arequipa, Arequipa 04001, Peru
6. Facultad de Ingeniería Civil, Universidad Nacional de San Agustín de Arequipa, Arequipa 04001, Peru
7. Department of Mining Engineering, Colorado School of Mines, Golden, CO 80401, USA
8. Nevada Bureau of Mining and Geology, University of Nevada Reno, Reno, NV 89509, USA
9. Department of Civil and Environmental Engineering, Hydrologic Science and Engineering Program, Colorado School of Mines, Golden, CO 80401, USA