Abstract
This research studies the evaluation of the heat flow exchanged between the soil, with two different types (soil in concrete and
soil in asphalt), and the urban environment on a streets of open shape. A method which takes into account all fluxes is
established. Thereafter, a numerical approach is made in order to assess the impact of the modification of energy balance on the
air warming. The proposed approach provides assistance in the identification of important parameters put in an obvious place the
phenomenon of warming of air and which can explain the thermal phase between the soil and urban environment in summer
period. This is due to the important sunshine duration and the importance mineral surface exposed to the direct sunlight. A set of
field measurement is performed using "multmeter" equipments to measure the temperature of the under soil, the air temperature
and the wind speed using a measuring instrument called "thermo-anemometer with propeller LV 110". The temperature of the
surface soil by an instrument called "Infrared Thermometer”. The relative humidity through an instrument called "Thermohygrometer
HD100". The time interval in the measurements is two hours. A total of two measuring stations, representing open
street with two different soil coatings (asphalt and concrete), are chosen in the city of Biskra. Such research is needed to find
reliable ways to determine the energy balance in an urban environment in the future.