1 Controls on spatial and temporal variability of streamflow 2 and hydrochemistry in a glacierized catchment 3 Running title: Controls on streamflow and hydrochemistry in a glacierized catchment 4 Michael Engel1, Daniele Penna2, Giacomo Bertoldi3, Gianluca Vignoli4, Werner Tirler5, and 5 Francesco Comiti1 6 1Faculty of Science and Technology, Free University of Bozen-Bolzano, Piazza Università 5, 7 39100 Bozen-Bolzano, Italy 8 2Department of Agricultural, Food and Forestry Systems, Via S. Bonaventura, 13, University 9 of Florence, 50145 Florence, Italy 10 3Institute for Alpine Environment, Eurac Research, Viale Druso 1, 39100 Bozen-Bolzano, 11 Italy 12 4CISMA S.r.l., Via Volta 13/A, 39100 Bozen-Bolzano, Italy 13 5Eco-Research S.r.l., Via Negrelli 13, 39100 Bozen-Bolzano, Italy 14 15 Correspondence to: Michael Engel (
[email protected]) 16 17 Abstract 18 The uUnderstanding of the hydrological and hydrochemical functioning of glacierized 19 catchments requires the knowledge of the different controlling factors and their mutual 20 interplay. For this purpose, the present study was carried out in two sub-catchments of the 21 glacierized Sulden River catchment (130 km², Eastern Italian Alps) in 2014 and 2015, 22 characterized by similar size but contrasting geological setting. Samples were taken at 23 different space and time scales for analysis of stable isotopes of in water, electrical 24 conductivity, major, minor and trace elements. 25 At the monthly sampling scale for different spatial scales (0.05 – 130 km²), complex spatial 26 and temporal dynamics for different spatial scales (0.05 – 130 km²) were found, such as 27 contrasting EC electrical conductivity gradients in both sub-catchments were found.