Abstract We studied the drying behavior of slurries of Markermeer sediments in the Netherlands having different solid compositions. Natural processes such as sand–mud segregation and oxidation of organic matter were mimicked to analyze the effect of changes in sediment composition. Evaporation experiments were performed with soft slurry samples using the Hyprop setup. Soil water retention curves (SWRCs) and hydraulic conductivity curves (HCCs) were determined as a function of the water ratio (WR, defined as volume of water/volume of solids). The sediment remained close to saturation until the end of the experiments. The Atterberg limits reduced significantly after sediment treatment involving drying at 50 °C, rewetting, and chemical oxidation. Furthermore, the oxidized sediment lost capacity to retain water. The SWRCs of sandy and oxidized clays were steeper, and fine-textured sediments showed large water ratios. At low matric suctions, the water retention capacity of the upper sediment samples containing more labile organic matter was larger than that of the sediment underneath. Clear correlations were found between van Genuchten parameters and the degree of degradation of the organic matter. The hydraulic conductivity of fine-textured samples with less labile organics was larger. The results give insight into the drying behavior of Markermeer sediment, currently used to build wetlands.

中文翻译：

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固相组成对 Markermeer 沉积物干燥行为的影响

摘要 我们研究了荷兰具有不同固体成分的 Markermeer 沉积物泥浆的干燥行为。模拟沙泥分离和有机物氧化等自然过程来分析沉积物成分变化的影响。使用 Hyprop 装置对软浆液样品进行蒸发实验。土壤保水曲线 (SWRC) 和水力传导率曲线 (HCC) 被确定为水比（WR，定义为水体积/固体体积）的函数。沉积物保持接近饱和直到实验结束。在涉及 50 °C 干燥、再润湿和化学氧化的沉积物处理后，阿特伯格极限显着降低。此外，氧化的沉积物失去了保水能力。砂质和氧化粘土的 SWRCs 更陡峭，质地细腻的沉积物显示出大的水比。在低基质吸力下，含有更多不稳定有机物的上层沉积物样品的保水能力大于下层沉积物的保水能力。在 van Genuchten 参数和有机物质的降解程度之间发现了明显的相关性。含有较少不稳定有机物的细质地样品的水力传导率较大。这些结果可以深入了解目前用于建造湿地的 Markermeer 沉积物的干燥行为。在 van Genuchten 参数和有机物质的降解程度之间发现了明显的相关性。含有较少不稳定有机物的细质地样品的水力传导率较大。这些结果可以深入了解目前用于建造湿地的 Markermeer 沉积物的干燥行为。在 van Genuchten 参数和有机物质的降解程度之间发现了明显的相关性。含有较少不稳定有机物的细质地样品的水力传导率较大。这些结果可以深入了解目前用于建造湿地的 Markermeer 沉积物的干燥行为。