The influence of rates of drying and wetting on measurements of soil water retention curves
The influence of rates of drying and wetting on measurements of soil water retention curves
复制标题
干湿率对土壤保水曲线测量的影响
DOI：
10.1051/e3sconf/202019503005
复制
发表时间：
2020
影响因子：
--
通讯作者：
Azizi A
中科院分区：
文献类型：
--
作者：
Azizi A
保水曲线是全面描述非饱和土水力力学特性的基础。达勒姆大学开发的保水测试系统允许使用高容量张力计直接和连续测量吸力，根据数字天平的质量读数和体积变化测量确定含水量。该系统进行了修改，以适应额外的张力计，以测量吸力在顶部除了现有的一个在底部的土壤样本。土壤样品进行干燥和润湿以下两个程序：离散测量进行阶段，以确保均衡和连续测量在不同的速率。在高饱和度下，连续和离散测量期间测量的所有吸力都非常接近。在较低的饱和度，从顶部和底部的样本的吸力值偏离离散测量中观察到的吸力。这种吸力值的偏差在加速干燥和润湿模式中更为明显。这可以通过水渗透性随着饱和度水平的降低而降低的事实来解释。
The water retention curve is fundamental for a comprehensive description of the hydro-mechanical behaviour of unsaturated soils. The water retention testing system developed at Durham University allows direct and continuous measurement of suction using a high capacity tensiometer, water content determined from mass readings of a digital balance and measurements of volume change. The system was modified to accommodate an additional tensiometer to measure suction at the top besides the existing one at the bottom of the soil specimen. Soil specimens were subjected to drying and wetting following two procedures: discrete measurements carried out in stages to ensure equalisation and continuous measurement at different rates. All suctions measured during continuous and discrete measurements were very close at high saturation degrees. At lower saturation degrees, the suction values from the top and bottom of the specimen deviated from suctions observed in discrete measurements. This deviation in suction values was more evident in accelerated drying and wetting patterns. This can be explained by the fact that water permeability reduces with the decrease in saturation levels.
用于确定土壤保水曲线的张力计技术
影响因子：
5
作者：
D. Toll;Jd Asquith;A. Fraser;A. Hassan;G. Liu;S. Lourenco;J. Mendes;T. Noguchi;P. Osiński;R. Stirling
通讯作者：
R. Stirling
用于实验室测试期间土壤吸力测量的微加工溶胶-凝胶相对湿度传感器
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
R. Cardoso;G. Sarapajevaite;Oleksandr M. Korsun;S. Cardoso;L. Ilharco
通讯作者：
L. Ilharco