Harvest Mulch on Bare Areas Fill from the construction of ground-based harvest tracks should be pulled back on to the track by an excavator. Adjacent harvest slash can also be scattered over the pulled back tracks to also help stabilise them if minimal additional land disturbance occurs. Contour Drains and Bund Walls Open drains constructed on the contour, or low earth bund walls, or a combination of both can be used to direct stormwater away from sensitive areas or to silt traps. Compacted earth bund 0.5 metres a art a rth Rock in Drains and Wa.te r Tables 0. Consider placing rock across drains and water tables as small check dams slow stor aml water down and reduces its erosive force.ch Rock lining of drains and water tables will also slow down stormwater and reduce its erosive force. l ck s Small check dams . 0. tr 0.5 Metres l in drai s i ck i i i Rock lining drains l l Ground level r l l 19 rrfa Ground surface Flow irti Doiirrffee ccotoiion