Soil water retention curves of hydrate-bearing sediment, frozen soil, and unsaturated soil

Samples of hydrate-bearing sediment, frozen soil, and unsaturated soil were prepared using the same host porous medium, Ningming clay, primarily composed of montmorillonite. The soil water retention curves (SWRCs) for the different samples were obtained by measuring their matric suction (Pc) and gravimetric water content (w). For frozen soil, matric suction was calculated based on temperature (T), while for hydrate-bearing sediment, it was determined using the temperature depression (Tb - T). Overall, the three porous media exhibit similar water retention capacities. The Excel file provides the data from tests and calculations.本数据集以蒙脱石（montmorillonite）为主要成分的宁明黏土作为统一宿主多孔介质（host porous medium），制备了含天然气水合物沉积物（hydrate-bearing sediment）、冻土与非饱和土三类试样。通过测定基质吸力（matric suction, Pc）与重量含水率（gravimetric water content, w），获取了各试样的土壤持水曲线（soil water retention curves, SWRCs）。其中，冻土试样的基质吸力通过温度（T）计算得到，含天然气水合物沉积物试样的基质吸力则依据冰点降低温差（temperature depression, Tb - T）确定。整体而言，三类多孔介质展现出相近的持水能力。本数据集配套的Excel文件包含了全部试验与计算所得的数据。