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首页> 外文学位 >Solute redistribution as influenced by soil properties in relation to landscape morphology in a glacial till landscape in Manitoba.
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Solute redistribution as influenced by soil properties in relation to landscape morphology in a glacial till landscape in Manitoba.

机译：曼尼托巴省冰川耕地景观中受土壤性质影响的溶质再分配与景观形态的关系。

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摘要

Solute redistribution was examined as influenced by soil properties in relation to landscape morphology to determine if systematic relationships occur in a glacial till soil-landscape near Miniota, Manitoba. The study examined: (1) Long-term solute redistribution across a representative soil-landscape, and (2) Short-term vertical and lateral movement of a soluble bromide (Br-) tracer at 3 representative soil-landscape complexes.; Generally speaking, soil properties indicative of progressive development were found to decrease with relative elevation (RE) and increase with convergent landscape character and measures of accumulation of water flows. Less variability in soil properties were found among landscape positions than between them.; Solute redistribution was more important during spring runoff than over the growing season at Crest and Midslope plots, while both hydrologic seasons were important at the Depression plots. Soil profiles and Br- redistribution patterns were found to be the least anisotropic at Crest plots, with high vertical relative to lateral redistribution (Vf/Lf). Vertical redistribution was found to be least important at the Midslope plots, where slope gradient (G) values were the highest. Relatively low Vf/Lf values were found where vertical curvature (Kv) was high, while relatively high Vf/Lf occurred where accumulation curvature (Ka) was high. CO3, Ahor, solum and PDI were significantly higher at Accumulation relative to Dissipation or Transit zones of flow. However, this concept did not appear to influence bromide redistribution parameters over the course of the study. (Abstract shortened by UMI.)
机译：考察了溶质再分配受土壤性质与景观形态的关系的影响，以确定在曼尼托巴省米尼奥塔附近的冰川直至土壤-景观中是否存在系统关系。该研究检查了：（1）在代表性土壤景观中的长期溶质再分布，以及（2）在3种代表性土壤景观中，可溶性溴化物（Br-）示踪剂的短期垂直和横向运动。一般而言，发现指示渐进发展的土壤特性随相对海拔（RE）降低而随会聚景观特征和水流累积量增加。在景观位置之间发现的土壤特性变异性要比它们之间的差异小。春季径流期间溶质的重新分配比在波峰和中坡地块的生长季节更为重要，而在hydro陷地带的两个水文季节都很重要。发现土壤剖面和Br-再分布模式在Crest地块具有最小的各向异性，相对于横向再分布（Vf / Lf）具有较高的垂直度。在中坡坡度最高的坡度中部地区，垂直重新分布的重要性最低。在垂直曲率（Kv）高的地方发现相对较低的Vf / Lf值，而在累积曲率（Ka）高的地方发现相对较高的Vf / Lf。相对于耗散区或过境区，CO3，Ahor，Solum和PDI在积累时明显更高。但是，在整个研究过程中，这一概念似乎并未影响溴化物的再分配参数。 （摘要由UMI缩短。）

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  • 作者

    Whetter, David Allen.;

  • 作者单位

    University of Manitoba (Canada).;

  • 授予单位 University of Manitoba (Canada).;
  • 学科 Agriculture Soil Science.; Geology.
  • 学位 M.Sc.
  • 年度 2004
  • 页码 281 p.
  • 总页数 281
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 土壤学;地质学;
  • 关键词

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