This study covers the analysis of temporal change of the land use in Terkos basin which is among the basins, actually the most important one, that were studied within the project of "Analysis of the Land-Use Changes by Using the Satellite Images of the Water Basins of Istanbul" carried out by a group from Istanbul Technical University (ITU), Remote Sensing Division for Istanbul Water Board Authority (ISKI). As the spatial resolution is high, IRS 1C-1D and LISS III satellite images belonging to three different years were used in the project. In the first stage of the study, geometric rectification process of the images were made. In the second stage, land-use classes were determined by applying classification algorithms on the basis of outer border of the long-term conservation area of Terkos basin. From the classification process and its results, area values were calculated and temporal changes were ascertained. In the last stage of the study, accuracy evaluations has been carried out.