Department of Geography and Environmental Development, Ben Gurion University of the Negev, Beer Sheba, Israel; Institute of Soil, Water & Environmental Sciences, Agricultural Research Organization, Volcani Center, Rishon Lezion, Israel.
Department of Geography and Environmental Development, Ben Gurion University of the Negev, Beer Sheba, Israel.
Sci Total Environ. 2018 Mar;616-617:1524-1532. doi: 10.1016/j.scitotenv.2017.10.161. Epub 2017 Oct 21.
Excess soils from construction sites (waste soils) become a problem when exposed to soil erosion by water or wind. Understanding waste soil erodibility can contribute to its proper reuse for various surface applications. The general objective of the study was to provide a better understanding of the effects of soil properties on erodibility of waste soils excavated from various depths in a semiarid region under rainfall and wind erosive forces. Soil samples excavated from the topsoil (0-0.3m) and subsoil layers (0.3-0.9 and >1m depths) were subjected to simulated rainfall and wind. Under rainfall erosive forces, the subsoils were more erodible than the topsoil, in contrast to the results obtained under wind erosive forces. Exchangeable sodium percentage was the main factor controlling soil erodibility (K) under rainfall, and a significant logarithmic regression line was found between these two parameters. In addition, a significant, linear regression was found between K and slaking values for the studied soil samples, suggesting that the former can be predicted from the latter. Soil erodibility under wind erosion force was controlled mainly by the dry aggregate characteristics (mean weight diameter and aggregate density): their higher values in the subsoil layers resulted in lower soil erodibility compared to the topsoil.
当建筑工地的多余土壤（废土）暴露于水或风的侵蚀时，就会成为一个问题。了解废土的可蚀性有助于其在各种表面应用中的适当再利用。本研究的总体目标是更好地了解土壤性质对在半干旱地区从不同深度挖掘的废土在降雨和风力侵蚀力作用下的可蚀性的影响。从表土（0-0.3m）和底土层（0.3-0.9 和>1m 深度）中采集的土壤样本分别进行了模拟降雨和风力侵蚀实验。在降雨侵蚀力作用下，底土比表土更容易受到侵蚀，这与风力侵蚀力作用下的结果相反。交换性钠百分比是控制降雨下土壤可蚀性（K）的主要因素，在这两个参数之间发现了显著的对数回归线。此外，在研究的土壤样本中还发现 K 和崩解值之间存在显著的线性回归关系，这表明前者可以从后者预测。风力侵蚀作用下的土壤可蚀性主要受干团聚体特征（平均重量直径和团聚体密度）控制：底土层中的这些特征值较高，导致土壤的可蚀性比表土低。
