Description: Polygons showing places where the predicted depth of 12 hr rainfall at 002 year ARI (using NIWA High Intensity Rainfall Design System predictions for Musselburgh weather station https://hirds.niwa.co.nz) exceeds the available subsurface storage of rainfall infiltration in unsaturated pore-space above the water table, referenced by the depth to MEDIAN groundwater after 000 cm of sea level rise. Derived from an 8m grid model equivalent RAINstor_12hrEXC_SLR000cm_ARI002_MED. May be useful for showing areas that require drainage and/or are exposed to elevated pluvial flood hazard due to influence of groundwater.
Copyright Text: Simon Cox/GNS Science 2023, incorporating NIWA HIRDS data