Abstract

GARCIA CUETO, Rafael; SANTILLAN SOTO, Néstor  and  OJEDA-BENITEZ, Sara. Radiactive balance and its impact on the thermal behavior in municipal dump: A case study in the city of Mexicali, B. C. Mexico. Rev. Int. Contam. Ambient [online]. 2012, vol.28, suppl.1, pp.109-117. ISSN 0188-4999.

The climate of any place on the Earth can be affected by anthropogenic influence when changing the use of native soil, for example, when establishing dumps on the cities surroundings. The thermal response of this change is result of the composition of heterogeneous soil, which integrates to the processes of lower atmosphere by interacting with the environment. As a result, it promotes the generation of microclimates, not always desirable, within of a region. This research presents an analysis of surface radiative components and soil temperatures, above of coverage of municipal solid waste on the outskirts of Mexicali City, Mexico. Measurements are performed with instrumentation that is usually used for energy balance in the lower atmosphere, complemented with soil temperature measurements made with a thermal infrared camera along predetermined transects. Surveys were realized during the morning schedule to get the behavior without solar gain, and when it has the maximum solar gain, i.e., in the early hours of noon. Net radiation, albedo and soil temperature are compared and discussed with data obtained from surrounding soil undisturbed by the dump. The results obtained show important differences, which can be attributed to local changes in land use, the biophysical properties of materials, and the calorific power of waste deposited in the dump. A discussion of the potential damages to the bioclimatic conditions of the surrounding communities is addressed.

Keywords : solid waste; bioclimate; net radiation; albedo; soil temperature; thermal images; thermal transects.

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