Comparing simple and complex hydrological models in regions

Comparing simple and complex hydrological models in regions with scarce data: a case study in the upper Vilcanota basin, Peru Randy Munoz, Christian Huggel, and Daniel Viviroli randy. munoz@geo. uzh. ch

Vilcanota catchment and glaciers Simple vs complex models ca. 9% - Lumped model: Temez modified (Temez, 1977) - Semidistribuited: HBV Light (Bergström, 1976; Seibert et al. , 2012) - Semidistribuited detailed: RS Minerve (García-Hernández et al, Tropical Andes: glaciers play an important role buffering water supply during dry season (June, July, August) 2014) - Satellite climate data

Glaciar contribution Q (m 3/s) 0 -200 -400 Au g- 93 92 g- 92 p- Qobs 20 Qsim t-9 Oc Qobs Mass balance rates from Dussaillant et al. 2019, Nat. Geosci 2 1 t-9 Oc t-8 Oc t-8 3 Oc t-8 Oc Error 0 -600 9 0 8 -400 7 5 6 -200 5 10 4 0 Q (m 3/s) 15 Qsim-Qobs (%) Qsim Se 91 p- Se 90 Se p- p. Se p- Se p. Se 89 -600 88 0 87 -400 86 100 85 -200 84 200 83 Q (mm) 0 Oc HBV Ligth (semidistr. ) RS Minerve (semidistr. detailed) 300 Knowledge building processes Qobs 400 Error Simple approaches (lumped models) Qsim-Qobs (%) Qsim Au Au g- 91 90 g- 89 Error Au g- 88 Au g- 87 Au g. Au Au g- 86 85 g- 84 Au Au g- g- 83 -600 Qsim-Qobs (%) 25 20 15 10 5 0 Au Temez modified (lumped) Model comparison Study site: ~ 0. 4 m w. e. /yr 6 parameters ↓ 21 parameters ↓ 30 parameters More detailed approaches (semidistribuited -detailed)

Thanks for your attention Randy Muñoz randy. munoz@geo. uzh. ch