查询词典 headwater erosion

To improve the purple soil storage capacity, to prevent soil erosion in hunan province, the choice of HengYangXian 20o purple soil slope, setting Guan waste land, grassland, natural forest and grassland and agrimony slight composite 4 processing, the water treatment performance and its mechanism, and the results show that, compared to the purple soil LuoDe HuangShanPo ground implement agrimony and three-dimensional planting trees for 1-2 years later, reduce soil bulk density 0.10 g/cm3 0.09 ~, soil porosity, permeability of soil moisture 14.01% increase rate increase 2.20 ~ 2.29 times.

为提高紫色土蓄水能力，防止水土流失，在湖南省衡阳县选择20o 左右的紫色土荒山坡地，设置祼地、自然草地、龙须草地和龙须草与林地复合4 个处理，比较分析各处理贮水性能及其改良机理。结果表明，与裸地相比，在紫色土荒山坡地上实行龙须草与林木立体种植1～2 年后，土壤容重降低0.09～0.10g/cm3，土壤总孔隙度增加14.01%，土壤水分渗透速率提高2.20～2.29 倍。

The Implementation Regulations specifically provide that fixed assets qualified for accelerated depreciation allowance include:(1) fixed assets fast becoming obsolete; and (2) fixed assets in a state of vibration and being exposed to high degree of erosion.

实施条例据此明确，可以享受这一优惠的固定资产包括：由於技术进步，产品更新换代较快的固定资产；常年处於强震动、高腐蚀状态的固定资产。

The evolution history of the volcanic rocks goes through five stages, the forming stage, the weathering and leaching stage, the burial and tectonic\|reforming stage, the erosion stage and the oil and gas accumulation stage. Finally, the model of porosity evolution was set up with andesite and basalt as examples.

在上述研究的基础上，将火山岩储集空间的演化过程分为火山岩的形成阶段、风化剥蚀淋滤阶段、埋藏和构造作用阶段、溶蚀改造作用阶段和油气聚集成藏阶段5个阶段，并以安山岩和玄武岩为例，建立了火山岩储层的孔隙演化模式。

The CFD method was applied to calculate and simulate the form and action process of the cavitation at the representative character of the cavitation erosion on the surface of the hydraulic turbines.Some argumentation was presented that micro jet impacted the wall with a certain degree when bubble collapsed with the result that the maximal strain of the wall annularly distributed the local of the boundary touching the micro jet.Cavitation was gradual to develop regionally at the mode of chain reaction and di...

针对水轮机叶片表面气蚀的典型特征，利用CFD方法进行仿真计算，模拟气蚀形成和作用过程；根据模拟计算结果提出了新观点：空泡溃灭发生微射流以一定的倾角冲击壁面，壁面材料产生的最大应变在流束边界局部区域，呈环状分布；空泡气蚀在局部区域是渐进的，以"连锁反应"形式扩展，具有一定过流环境的分布特征；典型的冲蚀缺陷形貌是空泡气蚀在不同阶段的产物。

China continues to lose arable land because of erosion and economic development.

中国继续失去耕地由于水土流失和经济发展。

In order to provide the visual information for synthetical management of water and soil conservation, this research hotlinks the attribute of terrain and vegetation to transportation area and sedimentation area through graph database、 erosion database and GIS.

为了给水土保持部门综合治理提供可视化信息，本研究通过建立图形数据库、侵蚀量数据库，借助地理信息系统（ArcView 3.2）将实际地形及植被等属性与侵蚀量的沉积区、搬移区域图形斑块进行热链接。

They provide oxygen conversion, filtering of air particulates, erosion control, air and surface cooling to offset miles of new asphalt, cement, and rooftops.

他们提供的氧气转换，过滤空气中的微粒，侵蚀控制，空中和地面冷却，以抵消英里新的沥青，水泥，及天台。

There are two models at present:(1)Thermal erosion and/or chemical metasomatism change the lower part of lithospheremantle into asthenosphere.

这一结论与热化学侵蚀或化学交代机制使岩石圈地幔改造为EMI印记实现减薄作用不一致。

TI: Piping and erosion in buffer and backfill materials.

缓冲和回填材料中的管蚀和剥。

Undoubtedly, ecomat mulch can not only control soil erosion, but accelerate revegetation in badland, hence, it can be extended in the similar projects and similar regions.

无疑生态垫既可有效地防止了水土流失，又可促进景观的绿化美化，因此可以在周边类似地区加以推广应用。

He studied their excrement for evidence of livestock hair.

他为家畜毛的证据研究他们的粪便。

Loneliness is not grounds for deportation, deportation of the people are not all lonely people.

寂寞也不是放逐的理由，放逐的人也并不都是孤独的人。