查询词典 headwater erosion

The erosion experiments of K, Na, Zn and Pb to refractory bricks used in blast furnaces of KISCO are performed separately and combinedly to determine the effects of temperature and time on erosion by these hazardous elements.

针对昆钢高炉使用的耐火砖，进行了K，Na，Zn，Pb单独和混合作用的侵蚀实验，考察了时间、温度对侵蚀的影响。

The fundamental cause of intense soil erosionpersist in erodible surface materials.Erosion control does not only reducesediment,but also erosion environment harnessing are taken as view ofdiscussion.

风蚀水蚀交错带侵蚀强烈的根本原因在于本区下垫面物质的易蚀性，矿区侵蚀的治理不能仅限于减沙，应以侵蚀环境系统整治为出发点。

Roughness, surface crust, erodible fraction, stubble and time of efficacy are the indicators for appraisal. Results show that herd grazing has worst effects on soils; plowing is positive to the soils with lower erodibility and negative to sandy soils.(4) Prediction and control of wind erosion are the end of research. Two famous prediction models WEQ and WEPS were briefly introduced. On the basis of summarizing general theory and methodology for wind erosion control, some key measures are suggested for the region of Ningxia.

评价结果显示秋季耕作、春季耕作、火烧、放牧等活动使农田表层土壤风蚀加剧；（4）首先介绍了美国风蚀预测模型，在比较全面地总结前人研究的基础上，本文概括了防治风蚀的一般原理与方法，针对宁夏地区，除了改进土地利用方式外，注意可风蚀性不同的土壤应采取不同的措施。

To better understand the soil erosion resistance of the different soil in south China so as to provide the necessary basic data for the forecast of regional soil erosion, planning of soil using, assessment of soil using and the potential fatalness of soil environment.

为更好的了解我国南方不同类型土壤的抗蚀性能，以便为区域土壤侵蚀预报、土地利用规划、土地利用评价和土壤环境潜在危险性评价等提供必要的基础数据。

The canopy of the species is strong in obstructing storms and reducing soil surface erosion and the water-holding capacity.As a result,the surface erosion is less than that on the grassed slope by 11％;the litter under the canopy has a depth of 5.5 cm on the average;and each adult tree can hold 0.3～0.69 m3 of rainfall.

杨梅树冠和树形有极强的阻截暴雨，减少地表径流以及蓄水能力，地表径流比草坡减少11%，树冠下部凋落物平均厚度5.5 cm，每株成年树可保存0.30～0.69 m3的降水量。

The cavitation erosion behaviours of the main two steels used in hydroturbine are investigated in distilled water with and without sand by ultrasonic vibration equipment for cavitation erosion.

利用超声振荡空蚀实验机对两种主要的水轮机用金属材料进行了清水和含沙水条件下的空蚀行为研究。

Meanwhile, it is also illustrates that the smaller chromium carbides have less restriction to forming thin splats than larger ones, which beneficial to limit the size of pieces removed by impact of the sand particles, and the higher volume fraction of small chromium carbide may effect the erosion through enhancing interlamellar bonding of the splats which leads to increase the erosion resistance of the coating.

揭示了细小碳化物颗粒有利于获得扁平粒子厚度较小的涂层结构，可减小涂层冲蚀磨损过程中每次剥落的体积；较高含量的细小碳化物颗粒有利于提高涂层扁平粒子间的结合，从而提高涂层抗冲蚀磨损性能。

Soil erosion ; maximum precipitation erosion slope ; grass belt interplanting

土壤侵蚀；坡度极限；草带间作

Invariableness wind velocity is used in experiment to measure soil erosion of different land use and then discover: Wind erosion quantity is close related to type of land use.

利用恒定风蚀风速，对不同用地风蚀量进行测定，发现土壤风蚀量的大小与土地利用类型之间有着密切的关系，而土地利用类型决定了地表植被盖度、土壤表层水分及土壤性质。

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。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？