Solute release and sediment entrainment on microcatchments in the Dinosaur Park badlands, Alberta, Canada
Solute release and sediment entrainment on microcatchments in the Dinosaur Park badlands, Alberta, Canada
复制标题
加拿大艾伯塔省恐龙公园荒地微流域的溶质释放和沉积物夹带
DOI：
10.1016/0022-1694(84)90072-6
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
I. A. Campbell
中科院分区：
文献类型：
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作者：
R. Bryan;A. Imeson;I. A. Campbell
本文首先考虑了模拟暴雨在不同荒地表面产生的径流中溶质的吸收和沉积物的夹带，然后，通过一些简单的实验室实验描述和研究了与溶质吸收相关的风化层材料的特性。现场和实验室结果非常一致。径流、溶质和沉积物的吸收受到风化层中存在的大量蒙脱土钠的深刻影响。页岩表面虽然对降雨反应较晚，但随着其膨胀和可蚀性的增加，会释放出越来越多的沉积物和溶质（钠和硫酸盐）。在其他表面上，低降雨接受率是由蒙脱石凝胶的分泌引起的，并且随着积聚的盐从表面冲洗出来，溶质和沉积物浓度逐渐减少。研究了模拟降雨的化学性质对实验结果的影响。人们认为有可能描绘不同荒地表面溶质和沉积物吸收模式的特征，并将这些信息应用于确定中尺度流域的径流来源和暴雨径流的路线。
This paper first considers the uptake of solutes and entrainment of sediments in runoff generated by simulated rainstorms on different badland surfaces, then, properties of the regolith materials related to solute uptake are described and studied in a number of simple laboratory experiments. Field and laboratory results are in close agreement.Runoff, solute and sediment uptake are profoundly influenced by the large amounts of sodium montmorillonite present in the regolith. Shale surfaces, although responding late to rainfall, release increasing amounts of sediment and solutes (sodium and sulphate) as they swell and increase in erodibility. On other surfaces low rates of rainfall acceptance are caused by the secretion of montmorillonite gels, and there is a gradual decrease in solute and sediment concentration as accumulated salts are flushed from the surface. The effect of the chemistry of the simulated rainfall on the experimental results is examined. It is considered possible to characterize the pattern of solute and sediment uptake on the different badland surfaces and to apply this information to the identification of runoff sources in mesoscale drainage basins and to the routing of storm runoff.