Sedimentologic and hydrodynamic data from the fluvial–tidal transition zone of the Waihou RIver, Aotearoa New Zealand

XLS files are for: carbon isotope analysis of mud sediments (carbon isotopes.xls) grain size distributions of all surface and core sediments (grain size data.xls) MAT files are for: time-series hydrodynamic and water chemistry data from all monitored sites. This was used to produce Fig. 2 (TimeSeriesData_Figure2.mat) flow regime classification data used to produce Fig. 7 (FlowRegimeClassificationData_Figure7.mat) backscatter data from sites 1, 3, and 5 used to produce Fig.S2 (BackscatterData_FigureS2.mat)