Abstract: Water movement in pavement sections that included an edgedrain trench was investigated by means of numerical simulations that explicitly included unsaturated water flow. Most of the resulting water movement from infiltration ...

Abstract: This paper presents a method to estimate the additional storage capacity derived from the presence of a capillary break or barrier beneath a soil layer used in a surface cover system. The method involves first estimating ...

Abstract: Unsaturated drainage layers (UDLs) have been demonstrated to greatly increase the lateral diversion capacity of capillary barriers. The inclusion of a UDL allows native soils suitable for vegetation growth to be used as ...

Abstract: Infiltration tests were conducted on soil columns of silty sand over pea gravel, concrete sand over pea gravel, and silty sand over concrete sand to investigate the capillary barrier effect of an underlying coarser soil ...

Abstract: An approach for draining water from unsaturated soil is presented that utilizes a sloping system of a fine sand overlying a coarser sand or gravel. In this configuration, referred to as an unsaturated drainage layer, the ...

Abstract: Accumulating data on traditional compacted soil-surface covers are demonstrating that they are likely to degrade and have reduced effectiveness as long-term barriers; therefore, suitable alternatives are being examined. ...

Abstract: A total soil water evaporation model that includes both transient (event based) evaporation and water table evaporation was developed by modifying an existing water balance type model incorporated in the widely used FAO-56 ...

Abstract: Reliability is an important factor in flexible pavement design to consider the variability associated with the design inputs. In this study, subgrade strength variability and flexible pavement designs are evaluated for ...