Gis based geomorphometric analyses and quantitative landslide hazard assessments of the Göksu river watershed

River watersheds have important dynamic natural processes that configure the landscape features under the control of climate, geology, hydrology and biodiversity. In this study, quantitative landslide hazard assessments and geomorphometric analyzes were carried out in order to determine the dynamic hydrological processes in Göksu River watershed of 11.213 km2. Slide and rock fall type landslides are common in the area, leading to significant social and economic losses. A landslide susceptibility assessment was carried out using MaXent method for rock-falls. Spatial probability in landslide hazard assessments for slide types were performed by artificial neural networks, decision tree and logistic regression methods. The temporal probabilities of the landslides, taking into account the landslide archive records and meteorological data, the return periods and the exceedence probabilities in certain periods (1, 5, 10, 25, 50 and 100 years) has been obtained. Evaluating the spatial extent - frequency analysis of the landslides, relevant probability density function was determined and the exceeding probabilities the landslides above the certain threshold value (Landslide area> 0.05 km2, 0.20 km2 and 0.50 km2) were calculated. It is believed that the results will make significant contributions to spatial planning studies for watershed management and landslide hazard mitigation in Göksu River watershed.