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首页> 外文学位 >CHEMICAL AND MINERALOGICAL PROPERTIES OF HIGHLY EROSIVE SOILS ON INSTRUMENTED WATERSHEDS.
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CHEMICAL AND MINERALOGICAL PROPERTIES OF HIGHLY EROSIVE SOILS ON INSTRUMENTED WATERSHEDS.

机译：仪器化流域上高侵蚀性土壤的化学和矿物学性质。

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摘要

Scope of Study. In spite of successful efforts for protecting millions of acres from accelerated erosion, much remains to be done, sediment is still the largest single pollutant of streams and lakes in the United States. Presently, watershed sediment models are needed to improve sediment-yield prediction for reservior design and to assess the impact of watershed cultural practices and other changes including urbanization. The location of instrumental watershed areas at the Woodward experiment station (USDA) is a unique opportunity to study some of the soil properties related to water runoff, soil removal, and the change of chemical and physical characteristics of the soil. Therefore, it would appear that study of these soils may be of value for relating runoff, siltation, and nutrient element removal on the productivity of these soils.; Findings and Conclusions. Cultural practice was not an important factor in controlling erosion in Woodward watersheds. More data must be collected for a sediment yield prediction model in the Woodward area from various land uses, soil types, and areas of different rainfall characteristics. An additional gauging site must be established in nongullied portions of Watershed 2 to determine the magnitude of gully erosion. Soluble nitrogen loss in surface runoff was a very small fraction of total nitrogen loss by sediment. Percent silt was the dominant fraction of soil texture in both surface and subsurface soil. The exchangeable cations in order of abundance were Ca, Mg, K, and Na, in the area. X-ray diffraction substantiated the dominance of illite, vermiculite, montmorillonite, and kaolinite in that area.
机译：研究范围。尽管成功地保护了数百万英亩的土地免于加速侵蚀，但仍有许多工作要做，沉积物仍然是美国河流和湖泊中最大的单一污染物。目前，需要流域沉积物模型来改善储层设计的产沙量预测，并评估流域文化习俗和包括城市化在内的其他变化的影响。伍德沃德实验站（USDA）的仪器分水岭地区的位置是研究与水径流，土壤去除以及土壤化学和物理特征变化有关的某些土壤特性的独特机会。因此，似乎对这些土壤的研究对于将径流，淤积和营养元素的去除与这些土壤的生产力相关联可能具有价值。结论和结论。文化活动并不是控制伍德沃德流域侵蚀的重要因素。对于伍德沃德地区的沉积物产量预测模型，必须从各种土地用途，土壤类型和降雨特征不同的地区收集更多数据。必须在分水岭2的非沟壑部分中建立一个额外的沟壑站点，以确定沟壑侵蚀的程度。地表径流中的可溶性氮损失仅占沉积物总氮损失的很小一部分。在表层和地下土壤中，淤泥百分比是土壤质地的主要部分。该区域中按丰度顺序交换的阳离子为Ca，Mg，K和Na。 X射线衍射证实了该地区伊利石，ver石，蒙脱石和高岭石的优势。

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  • 作者

    MOEZARDALAN, SHIRMOHAMMAD.;

  • 作者单位

    Oklahoma State University.;

  • 授予单位 Oklahoma State University.;
  • 学科 Agriculture Agronomy.; Geological Survey.
  • 学位 Ph.D.
  • 年度 1983
  • 页码 181 p.
  • 总页数 181
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农学（农艺学）;
  • 关键词

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