(Proceedings of Symposium S7 held during the Seventh IAHS Scientific Assembly at Foz do Iguacu, Brazil, April 2005. IAHS Publication 303, 2006, pp. 187)
The paper investigates the catchment area extension calculations as a function of the adopted spatial resolution an the effect of these spatial resolutions on the runoff calculations, for a number of catchments. Calculations were done with hypothetical and constant amounts of precipitation over space. Adopted grid size varied from 3000 to 2 m. Area estimate errors were computed in respect to 2 m grid resolution and the SCS method used for excess precipitation calculations. Results have shown that 75% of the catchments have errors of <15% of its area at any resolution and that the surface estimation errors are <±1% for a 200 m spatial resolution. For any catchment effective precipitation presented, small variations occurred when 300 m spatial resolution was used and at 100 m spatial resolution almost no variations were observed.
Corine land cover, French Mediterranean catchments, SCS, Spatial resolution
