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。同时，该地块产生的浊水还会对下游流域造成水体污染等次生环境破坏。本文考察了人工过滤材料和净水材料对改善土地开发活动产生的泥水的处理效果。通过组合各种模式的人工过滤器，可以很好地去除悬浮物。然而，间隙的堵塞状况成为人工过滤材料的一个麻烦。事实证明，净水材料与人工滤料组合使用对泥水的净化有足够的处理效果。此外，人们认为，将这些材料与现有设施（如沉降池）相结合，可以更有效地处理泥水。用净水药的PAC对其进行了实验和检验。土壤改良剂可促进水稻土的团聚。同时，土体不排水抗剪强度的增加，也阻止了雨滴冲力对土体团粒体的破坏。但是，没有上升的效果，当它不是更有效，因为它是这样做的，如果土壤调理剂做这个浓度厚，当任何固定浓度超过。在水稻土中加入PAC可以提高土壤的渗透性，改善排水，改善耕作。此外，土壤团聚体随着径流的流失而增加，随着颗粒结构的发展而减少。在实际现场中，有必要进行是否能预期PAC的效果有多大并进一步的检验。

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.