Effect of Rainfall Patterns on Concentration Of CO2, Soil Temperature And Matric Suction For Acidic Barren Soil

Abstract

This study is based on field monitoring of a soil-atmosphere toward on acidic barren soil. CO₂ in the cavity are dependent on climatic parameters, mainly on the outdoor temperature during rainfall. Observations were taken over a longer period of time. Maximum CO₂ values in the barren slope are reached in the warmest months and are in accordance with soil CO₂ values. The maximum CO₂ concentration in the barren slope is 3022 ppm on average, while the minimum is 2438 ppm. To describe the field findings, CO₂ production and diffusion experiments related to the soil behavior were developed. The results showed that the soil CO₂ production increases as the soil temperature and matric suction increase. The relationship between the gas diffusion coefficient and soil water suction is necessary data (i.e water evaporation or CO₂ evolution above the soil surface).