USE OF THERMAL INFRARED REMOTE SENSING FOR WATER BUDGET STUDIES

C Ottle (1) , Y Sucksdorff (1) , M Ben Mehrez (1)

1 CETP - Centre d'étude des environnements terrestre et planétaires

We have developed in our group an interface model which simulates the thermal and hydraulic exchanges between the soil, the vegetation and the atmosphere and estimates the energy fluxes at the surface. This model has been shown to be able to assimilate thermal infrared and microwave data for calibration of some surface parameters. It has been used over different regions and different periods of the year. Recentresults will be presented. A first study in the frame of the HAPEX-MOBILHY experiment,(1985-1986) has shown that satellite thermal infrared and visible data may be used to calibrate the soil and the vegetation functional parameters of the model and estimate during the year either the soil moisture in the surface layer or the water available in the root zone at a scale compatible with the grid of an hydrological model. The second study is the application of this method over a Finnish watershed continuously over the month of July 1988. The total evapoiranspiration has been estimated and compared to the estimate given by a water balance method.

Domaines: Sciences de l'environnement

C Ottle, Y Sucksdorff, M Ben Mehrez. USE OF THERMAL INFRARED REMOTE SENSING FOR WATER BUDGET STUDIES. Advances in Space Research, 1991, 11 (3), pp.163-167. ⟨hal-03299111⟩