水土

Basing on the carefully analysis of the theoretical technoledge project practice in domestic and foreign open pit coal mines,applying the theory such as ecology mining penology farming and forestry the conservation of soil and water ,and environmental project etc.

本文在认真分析、总结国内外露大煤矿土地复垦的理论和工程实践的基础上，应用生态学、农林学、土壤学、采矿学、水土保持、环境工程等多门学科的理论，详细论述了露天煤炭开采对区域环境的影响，提出了应用生态系统的演变规律来指导露天煤矿的土地复垦，从而实现了把复垦区水土保持和土地最终利用方向有机结合。

In this paper,taking several typical control types of Three Gorges reservoir area as the example,the effect factors, characteristics and rules of the soil erosion and its diversification of the soil physical and chemical properties under different vegetation types were studied by large numbers of pilot field survey and positioning observation.

占总面积66.3%的山区旱坡地是三峡库区江河泥沙的主要来源，为了控制三峡库区水土流失，科技人员对三峡库区坡耕地土壤侵蚀进行了大量的调查研究，但对于构建不同植被类型下的水土流失特征及其生态效应研究还停留在定性描述的阶段。

Moreover, China has unfolded large-scale projects for water and soil conservation throughout the country, and constructed a shelter-forest network for fields in the plains to control soil erosion.

在全国范围内开展了大规模的水土保持，建设平原农田防护林网，治理水土流失

Moreover, China has unfolded large-scale projects for water and soil conservat throughout the country, and constructed a shelter-forest network for fields in the plains to control soil erosion.

在全国范围内开展了大规模的水土保持，建设平原农田防护林网，治理水土流失

Article 28th strengthening river beaches, river banks and dikes of soil and water conservation, prevention of soil erosion and river siltation.

第二十八条加强河道滩地、堤防和河岸的水土保持工作，防止水土流失、河道淤积。

The nitrogen and pesticide in the topsoil with soil erosion go into river, lake and reservoirs and so on. So that the soil erosion reduced, the nocuous matter loss can be controlled as well, the sediment silt and water pollution in rivers, lakes and reservoirs can be decreased.

土壤中氮和农药等有害物质的流失是以水土流失为载体，进入江河、湖泊、水库等水源地，加大了这些水源地的污染，所以减轻了土壤水土流失量，就能够很好控制农耕地有害物质的流失，减轻江河、湖泊、水库等水源地的泥沙淤积和水质污染。

Because of the solubility of carbonate rock,the instability of karst soil and the vulnerability of karst vegetations,the risk of water and soil loss is bigger in carbonate rock areas than in noncarbonate rock areas.

由于碳酸盐岩的可溶蚀性、所形成土壤的不稳定性及碳酸盐岩植被的脆弱性等特征，在碳酸盐岩区水土流失的风险较非碳酸盐岩区更大，水土流失敏感性受岩性的影响比非碳酸盐岩地区更明显。

The lack of water resource and the low disposal quotiety of industrial liquid waste, which still cannot achieve the requirement of the economic sustainable development, are lasting and essential restricting factors to economic sustainable development, too.

分析了甘肃水土资源对社会可持续发展的作用：①甘肃水土资源通过对区域经济系统的作用间接对社会可持续发展产生的作用。

Sabaigrass planting prevent and cure water and soil loss The study results indicated: Sabaigrass lowered the water and soil loss of purplesoil distinctly.

3龙须草种植能有效防治水土流失本研究结果表明：种植龙须草能显著降低紫色土荒坡地的水土流失。

Besides, from the water and soil loss monthly dynamic data, wecan see the Sabaigrass had the hearty growth before the rainy season to protect thewater and soil and raise the ability of fighting a drought.

此外，从各处理水土流失月季变化动态可知，龙须草在雨季来临前得到了旺盛生长，形成了厚密的草垫，雨季时能有效防治水土流失，也可涵养较多的水分，提高抗旱能力。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。