Soil loss control and treatment of muddy water due to soil loss with filter material and effects of them

城市和农田的无序发展破坏了自然。没有蔬菜的土地造成土壤流失和退化。而且，从该土地产生的泥水带来了二次环境破坏，如下游流域的水污染。本文研究了人工滤料和净水材料对土地开发活动产生的泥水的处理效果。通过各种模式的人工过滤器组合，可以很好地去除悬浮固体。然而，缝隙堵塞的状况成为人工滤料的一大难题。实践证明，净水材料与人工滤料的组合对浑水的净化具有足够的处理效果。此外，认为将这些材料与沉淀池等现有设施相结合，可以更有效地处理泥水，并使用净水药剂PAC进行了试验和验证。土壤改良剂能促进水稻土团聚体的形成.通过提高土体的不排水抗剪强度，防止了雨滴冲击力对土体团聚体的破坏。然而，没有上升的效果，当它不是更有效的，因为它是这样做的，如果土壤调理剂做这个浓度厚，当任何固定的浓度被超过。在水稻土中添加PAC，可以预期土壤的渗透性、排水性、耙动性都有改善。土壤团聚体随径流流失而增加，随颗粒结构的发育而减少。在实际应用中，有必要对PAC的效果能否达到预期的程度进行进一步的检验。

Nature is destroyed by disordered development of cities and farmland. The land deprived of vegetable causes soil loss and degradation. And, the muddy water generated from that land brings about secondary environmental destruction such as water pollution in the downstream basin. This paper examines the treatment effects of artificial filter materials and water purification materials on the improvement of the muddy water generated from land development activities. Suspended solids can be removed fairly well by combining artificial filters in various modes. However, the clogged conditions of gaps become a trouble to artificial filter materials. It has been proved that combinations of water purification materials and artificial filter materials have sufficient treatment effects on the purification of muddy water. Furthermore, it is considered that muddy water can be treated more effectively by combining these materials with existing facilities such as a settling basin.It was experimented and was examined using the PAC of water purification medicine. The aggregation is promoted the paddy soil by using soil conditioner. And, the soil aggregate destruction by the impulsive force of the raindrop is prevented by the increase of the undrained shear strength of soil. However, there is no rise of the effect, when it is not more effective, as it is done, if the soil conditioner does this concentration thick, and when any fixed concentration is exceeded. Permeability of the soil, improvement of the drainage, improvement on the harrowing can expect that the PAC is added to the paddy soil. In addition, soil aggregate increases on the soil loss by run-off, and it is reduced by the development of the granular structure. In actual field, it is necessary to carry out whether it can expect the effect of the PAC how much and further examination.