Variation of Soil Temperature with Time and Depth in Karbala Region

Abstract

A theoretical investigation of factors affecting soil temperature variation with time and depth is presented. Annual soil temperature variation with time and depth declares that there is a considerable temperature variation in the upper few meters that is necessary to several application fields include agriculture, civil engineering, and environmental engineering. One-dimensional mathematical model is used to study the annual soil temperature variation. The model solution was calibrated with soil temperature measurements at Karbala region. The calibrated mathematical expression is a useful mean to describe the soil temperature variation with time and depth in Karbala region. Results show that at depth below about six meter the soil temperature is approximately constant.