TOP SOIL PROTECTOR AND TOP SOIL PROTECTION METHOD

摘要

To be difficult to collapse over time and to procure materials easily.SOLUTION: A net bag body 10 is provided with an inner net bag 13 containing stone materials 11 and an outer net bag 14 containing the inner net bag 13 and containing stone materials 12 on the outer side thereof. The stone constituting the stone materials 12 is generally larger than the stone constituting the stone materials 11. When the net body 10 is installed on the ground so as to cross the path of running water, sediment accumulate in the gaps between the stone materials 11 and 12 each time the running water mixed with sediment passes through the net bag body 10 at the time of rain.SELECTED DRAWING: Figure 1