NIWA’s Trimble GPS Total Station 5700 surveying system features extended RTK (real-time kinetic) technology. This global positioning system is capable of measurements with an accuracy of 10mm in the horizontal and 20 mm in the vertical. It allows NIWA to undertake precise topographic and (with an accurate echo-sounder) bathymetric surveys. This enables us to measure beach stability, river bed erosion and deposition and to create digital terrain models of rivers for 2-dimensional hydrodynamic modelling.

Contact

Maurice Duncan [ m.duncan@niwa.co.nz ]