Application Attachment Appendix C Hydrology Assessment Manawa Energy 14 Feb 2023
rainfall for the Waitara catchment is expected to be about 2,200 mm. A catchment-wide mean annual rainfall of about 3,200 mm is estimated for the Manganui River based on the recorded mean flow at Everett Park (19.5 m3/s). In a normal year, significant rainfall occurs in every month of the year, with the three months from January to March receiving roughly 30% less rainfall than other months on average. This lower rainfall period coupled with the higher temperatures and evapo-transpiration rates in