Articles | Volume 19, issue 4
Research article
17 Apr 2015
Research article |  | 17 Apr 2015

Characteristics and controls of variability in soil moisture and groundwater in a headwater catchment

H. K. McMillan and M. S. Srinivasan


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Short summary
River flows depend not only on how much water is in a catchment, but also on where the water is stored, which changes over time. We monitored streamflow, soil moisture, and groundwater levels in a NZ catchment, to find out what controls water storage and variability. We found that the catchment had a summer mode where water storage is controlled by near-surface interactions of water with soils and vegetation, and a winter mode where water storage is controlled by deeper groundwater movement.