Tuesday 26 March 2019

Winter runoff data download



First time to download the water level data loggers after the long winter season. Here I am plotting the data from the Kadec logger, which shows there were three notable rain-on-snow (ROS) peaks (2 Feb, 20 Feb, and 12 Mar) all with a peak stage of about 0.8m. Low winter baseflow continued for about one month from late December to the first ROS event on 2 February. After the second ROS event on 20 February the base flow remains higher as we enter the snowmelt season.



Marginal snowpack remains in the forest around the stream gauge. The snow lysimeter at the larch site was relatively more exposed than at the cedar site. It is normal for the larch site to melt-off a few days before the cedar site. Melt-off dates seem likely to be close to average (end March to early April). The lack of ponding in the larch lysimeter trays indicates good drainage conditions with no problems.






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