RIMU hydrology situation report. 13 January 2021
Author:Auckland Council Research and Evaluation Unit, RIMU
Source:Auckland Council Research and Evaluation Unit, RIMU
Regional summary for December 2020 to 13 January 2021
Rainfall in December was below the normal range for all sites. Two rain events in early January recorded 30 to 50mm of rainfall. Soil moisture fell at all sites throughout December due to low rainfall but increased following January rains. Low soil moisture persists in the north and central sites, but high soil moisture was recorded at other sites in the north-central and south. River flows fell across the region in December, however increased after January rains. Almost all sites remained above the mean annual low flow (MALF). Groundwater levels varied according to geology and water use pressures. Low groundwater levels were observed in shallow volcanic and deep Waitematā sandstone aquifers. ...