FIGURE 4. Daily values of mean discharge (black line), streamwater temperature (red line) and electrical conductivity (blue line) during the period April 1st to July 1st at the Izas gauging station.
Water temperature also allowed to assess the relevance of snow melting in streamflow generation. Water was noticeably cold (normally < 3º C, interrupted by some rainfall events and very warm days), and ruled by the snowmelt dynamics during the period encompassing mid-May to mid-June. Only when the snow cover area was less than approximately 10%, did water temperature increase quickly until reaching 15-20ºC by the end of June. This was not the case in June 2018, when the deep and longest-lasting snowpack limited the temperature increase of streamflow water even in late June.