Three rainfall simulations will be undertaken at each of four different land use combinations as soon as possible after the wet season (plus 3 demonstration/field days). Simulation runs could include:

• Endeavour Valley horticulture- different management practices, roads etc
• Lakeland horticulture- different management practices, roads, etc
• 2 x grazing properties - different grazing pressures incl. exclusion area, grazing and roads on sodic soil

Simulated rainfall will be applied to small plots (up to 1.8m wide, 2m long) at a rainfall rate similar to a 1 in 10 year return interval (e.g. 64mm/hr for 1 hour at Lakeland). Rainfall will be applied until runoff, then for a further 30 minutes. Runoff will be sampled at 5 minute intervals to calculate discharge and water quality samples (sediment and total/filtered nutrients) collected (6 samples per simulation run). Water quality samples will also be collected from each of the water sources used for the simulated rainfall (assume four sources).