Surface Run-off in Railroad Track Ballast Section Filtration Analysis and Characteristics

Abstract

Railway facilities are usually defined as stationary engineering structures that constantly influence environment. Railway stations are main contaminators in railroad sector. Usually contaminated surface run-off coming from railroad tracks of railway stations is the result of atmospheric precipitation. Surface run-off flows through surface relief deep into the soils. Then it joins ground flows and enter the nearest surface waterbodies. The paper gives analysis of surface run-off filtration through multi-layer porous medium in ballast section of railroad tracks. The authors describe liquid behaviour and properties in multi-layer porous medium. The particular attention is paid to liquid which concentrates on the surface of railroad tracks ballast section as a result of atmospheric precipitation. The paper also considers stationary and non-stationary liquid weepage into railroad tracks ballast section and spilled petroleum products spreading.