watercourses >100 m potable <100 m potable Slope <5% 5-10% >10% Landslip Zero actual, or Moderate to high Present or past low potential for potential for failure failure failure Groundwater >3 m 1.5-3 m <1.5 m (seasonal watertable depth) Surface <20% 25-50% >50% gravel (spatial cover) Rock outcrop <10% 10-20% >20% (spatial cover) Erosion Zero or minor Moderate to high High to severe potential erosion potential erosion potential erosion potential High sun and Moderate sun and Low sun and wind Exposure wind exposure wind exposure exposure Landform Hill crests, Concave sideslopes Floodplains and convex side and footslopes incised channels slopes and plains Vegetation Turf or pasture Shrubs or open Dense forest with Type woodland little understorey Average <800 mm/year 800 - 1400 mm/year >1400 mm/year Rainfall Pan >1400 mm/year 800 - 1400 mm/year <800 mm/year Evaporation Soil Characteristics Fill No fill; or fill Some fill; or fill Extensive fill, or fill good quality moderate quality poor quality Soil 2 and 3 4 and 5 1 and 6 permeability category (AS1547:2013) Profile depth >0.5 m 0.25-5 m >0.25 m Presence of None Moderate Extensive mottling
watercourses >100 m potable <100 m potable Slope <5% 5-10% >10% Landslip Zero actual, or low potential for failure Moderate to high potential for failure Present or past failure Groundwater (seasonal watertable depth) >3 m 1.5-3 m <1.5 m Surface gravel (spatial cover) <20% 25-50% >50% Rock outcrop (spatial cover) <10% 10-20% >20% Erosion potential Zero or minor erosion potential Moderate to high erosion potential High to severe erosion potential Exposure High sun and wind exposure Moderate sun and wind exposure Low sun and wind exposure Landform Hill crests, convex side slopes and plains Concave sideslopes and footslopes Floodplains and incised channels Vegetation Type Turf or pasture Shrubs or open woodland Dense forest with little understorey Average Rainfall <800 mm/year 800 - 1400 mm/year >1400 mm/year Pan Evaporation >1400 mm/year 800 - 1400 mm/year <800 mm/year Soil Characteristics Fill No fill; or fill good quality Some fill; or fill moderate quality Extensive fill, or fill poor quality Soil permeability category (AS1547:2013) 2 and 3 4 and 5 1 and 6 Profile depth >0.5 m 0.25-5 m >0.25 m Presence of mottling None Moderate Extensive