The hydrology of the Waitakaruru River and Maukoro Canal systems and drainage of the Pouarua peat dome

The Pouarua peat dome area has been investigated to determine its effectiveness for flood prevention and to determine the impact of land drainage on the peatlands. This study has been mainly concentrated on an area of relatively high peatland located on the Hauraki Plains immediately southwest of Ngatea that is known as the 'Pouarua peat dome'. 

This report reassesses the hydrology and hydraulics of the Hapuakoke ranges taking into consideration records of rainfall and runoff that have been gathered over recent years. Flood lows are modelled in the Maukoro canal to assess its capacity and what flood levels can be expected in the vicinity of the Pouarua peat dome under existing conditions. The future drainage requirements of the flat lands are considered and a proposal is presented that will allow for the implementation of drainage upgrading.