Variations in soil heat transfer under different land use types in Abia State, South eastern Nigeria

Authors : Brown Mang ONWUKA, Paul. C. OGUİKE, Emmanuel Adeboye ADESEMUYİ

Pages : 1-8

Doi:10.18393/ejss.797843

View : 15 | Download : 4

Publication Date : 2021-01-01

Article Type : Research Paper

Abstract :An in-depth knowledge on variations in soil heat transfer under different land uses is essential for proper understanding of the variations in thermal energy transfer under different human activities and modifications on land. This paper presents an investigation on the variations in soil heat transfer under different land use types in Abia State. This study evaluates three land use types: forest land insert ignore into journalissuearticles values(FL);, continuously cultivated land insert ignore into journalissuearticles values(CC); and excavation site insert ignore into journalissuearticles values(EX);. The parameters investigated in this study include; particle size distribution, bulk density, volumetric moisture content, atmospheric temperature, soil temperature, soil thermal conductivity, soil heat flux, soil volumetric heat capacity and soil thermal diffusivity. The results show that the different land use types studied influenced the soil heat energy transfer and had a significant effect on soil thermal properties. The results revealed that excavation site recorded the highest soil bulk density insert ignore into journalissuearticles values(1.70 Mg m-3); and soil temperature insert ignore into journalissuearticles values(42.6oC); while forest land recorded the lowest bulk density insert ignore into journalissuearticles values(1.36 Mg m-3); and soil temperature insert ignore into journalissuearticles values(30.3oC);. The transmission of heat through a unit length of soil per unit cross-sectional area insert ignore into journalissuearticles values(2.476 W mk-1); was higher in forest land than the other land use types studied. Soil under continuously cultivated land recorded the highest volumetric heat capacity insert ignore into journalissuearticles values(1.407 J insert ignore into journalissuearticles values(m3K);-1);. This study will help farmers and land owners in terms of choice and management of different land use types for agricultural and industrial purposes.
Keywords : Soil heat energy transfer, bulk density, soil temperature, soil thermal conductivity, volumetric heat capacity, soil thermal diffusivity