Soil-water retention curve and beginning of monitoring in Tierra Blanca Joven (TBJ)

Revista Geológica de América Central

Landaverde, José²  Chávez, José A.¹  López, Reynaldo³  Kopecky, Lubomir² 

[1] Oficina de Planificación del Área Metropolitana de San Salvador (OPAMSS), El Salvador;Czech Technical University in Prague, Czech Republic;Universidad de El Salvador, El Salvador

关键词: /span> Tierra Blanca Joven;    suction;    filter paper;    pressure plate;    centrifuge;    tensiometer;    soil moisture sensor;   

DOI  :  

学科分类：地质学

来源: Universidad de Costa Rica * Editorial

【 摘 要 】

In El Salvador during the rainy season or when major earthquakes occur, the areas covered by the volcanic tephras Tierra Blanca Joven (TBJ) suffer mass movements, liquefaction and erosion; causing important environmental, social and economic losses. To start the characterization of these unsaturated soils, suction values of a fall unit of TBJ were obtained using pressure plate, centrifuge and filter paper to build a Soil-Water Retention Curve. The use of this curve into finite elements software can help to acquire shear strength and permeability properties. The filter paper showed to be a practical method but close to saturation the pressure plate is needed. With the centrifuge, scatter results were observed. Also field test using Quickdraw tensiometer (suction) and TMS3 (soil moisture content) are being conducted to propose a field methodology for an early warning system for the slopes, that could help in urban planning and risk assessment.

【 授权许可】

CC BY-NC