9、 erosionthe type of soil erosion)的)的划分方法也不一样。最常用的方法主要有按导致划分方法也不一样。最常用的方法主要有按导致土壤侵蚀的外营力种类来划分、按土壤侵蚀发生土壤侵蚀的外营力种类来划分、按土壤侵蚀发生的时间划分和按土壤侵蚀发生的速率划分三种。的时间划分和按土壤侵蚀发生的速率划分三种。 在...
土壤侵蚀强度(intensity of soil erosion) 所指的是某种土壤侵蚀形式在特定外营力种类作用和其所处环境条件不变的情况下,该种土壤侵蚀形式发生可能性的大小。按轻微、中度、严重等分为不同级别。 允许土壤流失量(tolerance of soil loss)是指小于或等于成土速度的年土壤流失量。也就是说允许土壤流失量是不至于导致...
3、提高土壤的抗蚀性和抗冲性 土壤的抗蚀性(Anti-erosion of soil)指土壤抵抗径流对土壤分散和悬浮的能力,其强弱主要取决于土粒间的胶结力及土粒和水的亲和力。胶结力小且与水亲和力大的土粒,容易分散和悬浮,结构易受破坏和分解。土壤抗蚀性指标主要包括水稳性团聚体含量、水稳性团聚体风干率(风干土水稳性团粒...
Land class of our proposed site: Class Two There may not be enough sunlight during some parts of the day to support plant growth because there are. HOW DO PLANTS PREVENT SOIL EROSION?. HOW TO PREVENT SOIL EROSION Did you know that soil erosion is a natural process that normall...
水土保持英文课件6 Soil and Water Conservation-Wang Min.ppt,Soil and Water Conservation Wang Min (王敏) (School of Water Engineering and Building) Soil Erosion What’s soil erosion? Erosion is the process of detachment and transport of soil particles by
erosion[i‘rəuʒən]n.侵蚀infrastructure['infrə'strʌktʃə]基础设施desertification[dezətifi‘keiʃən]沙漠化 urbanization[.ə:bənai'zeiʃən]城市化 Let’sseeaninstance.Sincethespringof2000,Beijingand自从2000年的春天，北京和中国northwestChinahaveseveral西北部已经经历的...
For example, the hazard of soil erosion is determined not by slope angle alone but by the interaction between slop angle, slop length, permeability, soil structure, rainfall intensity and other characteristics. Because of this problem of interaction, it is recommended that the comparison of land ...
Most of the splashed soil particles don't leave the field; they clog surface pores, which in turn reduces water infiltration, increases water runoff, and increases soil erosion.(二)溅蚀量击溅侵蚀引起土粒下移的数量称为溅蚀量。在侵蚀力不变情况下,溅蚀量决定于影响土壤可蚀性的诸因子(包括内...
Soil erosion,Around the world, every year 6,000,000 hectares of land desertification happen. According to the China State Forestry Admini 5、strations announcement in June 17, 2006, China desertification land reached 1,739,700 square kilometers, accounting for more than 18% of land area. It ...
chemical and biological processes called weathering. • Mature soils have developed over a long time are arranged in a series of horizontal layers,soil horizons. Fig. 15-8, p. 343 Erosion Transportation Weathering Deposition Igneous rock Granite, pumice, basalt Sedimentary rock Sandstone, limestone...