Abstract

Wind erosion is a serious problem in the world, especially in Iran. Several studies have used windbreaks and barriers to reduce wind erosion and wind-induced dust emissions; however, there is no study on the development of the ridge with a device. In this study, a new machine was designed and manufactured to create a ridge by mixing soil with biopolymer. The device was developed in three sections (machine, mixing, and ridge maker sections). Mechanisms that control movements are chain drives, brakes, and clutches that enable the device to operate in different topological regions. As part of a test phase of the device, three levels of polymer suspension (10, 20, and 30%) were added to the soil and a ridge was made by the ridging device. These ridges were created in one-hectare flat agricultural land. The ridging device efficiency was tested in 48 h field measurements during September 2018, where three measurements, including penetration resistance, aggregate stability, and ridge height and width were carried out. The results showed 1.5 kg cm⁻² penetration resistance in the ridge using 30% volumetric suspension. The highest ridge was 43 cm with 30% suspension. Aggregate stability values of the ridges at 30% and 20% volumetric suspensions were 0.88 and 0.78, respectively. Overall, the results showed that creating a ridge with an optimum height could reduce wind velocity, soil transportation, and limit saltation in the ridge windward and leeward zones.

摘要

风蚀是世界上一个严重的问题，尤其是在伊朗。多项研究使用防风林和屏障来减少风蚀和风尘排放；但是，没有研究开发带有设备的脊。在这项研究中，设计并制造了一种新机器，通过将土壤与生物聚合物混合来创建山脊。该设备分为三个部分（机器部分、混合部分和压脊机部分）。控制运动的机制是链传动、制动器和离合器，使设备能够在不同的拓扑区域中运行。作为该装置测试阶段的一部分，将三种水平的聚合物悬浮液（10%、20% 和 30%）添加到土壤中，并通过起垄装置形成一个脊。这些山脊是在一公顷平坦的农田上建造的。2018 年 9 月，在 48 小时现场测量中测试了起垄装置效率，其中进行了三项测量，包括穿透阻力、集料稳定性以及脊高和宽度。结果显示 1.5 kg cm使用 30% 体积悬浮液在山脊中的^-2穿透阻力。最高的山脊为 43 厘米，悬浮度为 30%。在 30% 和 20% 体积悬浮液下，脊的聚合稳定性值分别为 0.88 和 0.78。总体而言，结果表明，创建具有最佳高度的山脊可以降低风速、土壤运输，并限制山脊迎风和背风区的跃移。