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The use of wood chips to control soil erosion on construction sites.

机译：使用木片控制建筑工地的水土流失。

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摘要

Wood chips were studied for their efficacy in controlling soil erosion on construction sites that have disturbed soils on steep slopes. The purpose of the research was twofold: to determine if wood chips could be used to reduce the off-site movement of soil during construction activities, and to find an environmentally sound alternative to the landfill disposal of wood wastes generated in the urban forest. The research was conducted using field plots that received natural precipitation and laboratory plots that received simulated rainfall. At a local construction site, twelve erodible plots were established on an embankment with a 55 percent slope and an elevation change of nearly 12 m. Each plot had a width of 3 m and a slope length of 10 m. A series of flow dividers was installed at the toe of each plot to measure runoff and sediment. The laboratory plots were one meter wide and had a slope length of three meters. A variable slope stand was fabricated to hold the laboratory plots at 40 percent (2.5:1), 50 percent (2:1), and 67 percent (1.51) slope steepnesses. The simulated rain events had a constant intensity of 64 mm/h. Four treatments were studied: large wood chips, small wood chips, a mixture of wood chips sizes, and no chips. The wood chips were applied at a rate that provided coverage to 80 percent of the soil surface.At the construction site, the small wood chip treatment did not produce an erosion rate that was significantly different from the zero-cover plots the large wood chip and mixture of chip sizes were not significantly different from one another but were significantly different from the zero-cover treatment. Overall, as compared to the zero-cover treatment, the small wood chip treatment reduced erosion by 22 percent, the large wood chips reduced erosion by 78 percent, and the mixture of chips sizes reduced erosion by 86 percent. The results of this project indicate that wood chips should be utilized as a soil cover and need not be discarded as solid waste.
机译：研究了木屑在控制陡坡土壤扰动的建筑工地上水土流失方面的功效。该研究的目的是双重的：确定是否可以使用木片减少建筑活动期间土壤的异地迁移，并找到对城市森林产生的木屑进行垃圾掩埋处理的无害环境的替代方案。该研究是使用接收自然降水的田间田地和接收模拟降雨的实验室田地进行的。在当地的建筑工地上，在路堤上建立了12个易蚀地块，坡度为55％，高程变化接近12 m。每个地块的宽度为3 m，坡度为10 m。在每个样地的脚趾处安装了一系列分流器，以测量径流和沉积物。实验室地块宽为一米，坡度为三米。制作了一个可变的坡度支架，以将实验室地块的坡度保持在40％（2.5：1），50％（2：1）和67％（1.51）。模拟的降雨事件的恒定强度为64 mm / h。研究了四种处理方法：大木片，小木片，木片大小的混合物和无木片。木屑的施用速度可覆盖80％的土壤表面。在建筑工地，小木屑处理不会产生与大木屑和零覆盖区零覆盖率明显不同的侵蚀率。芯片尺寸的混合物彼此之间没有显着差异，但是与零覆盖率处理显着不同。总体而言，与零覆盖处理相比，小木片处理可减少22％的侵蚀，大木片可减少78％的侵蚀，木片大小混合可减少86％的侵蚀。该项目的结果表明，木片应被用作土壤覆盖物，而不应作为固体废物丢弃。

著录项

  • 作者

    Buchanan, John Raymond.;

  • 作者单位

    The University of Tennessee.;

  • 授予单位 The University of Tennessee.;
  • 学科 Agriculture Soil Science.Engineering Environmental.Engineering Agricultural.
  • 学位 Ph.D.
  • 年度 2000
  • 页码 105 p.
  • 总页数 105
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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