To sustainably manage the Black Sea, the sources of pollutants and litter to the streams and rivers that contribute to Sea pollution need be identified and quantified. These sources are major contributors to the degradation of the Black Sea. The two main sources are surface erosion and stream bank erosion and their measurements will take place at different scales. For surface erosion initially gerlach traps and runoff plots will be installed and measured. The traps and plots will be placed under different land-use/vegetation covers and/or burnt areas or frequently flooded areas. Afterwards calibrated hydrologic models, will be applied to determine the potential pollutants sources at the watershed scale. These models will utilize the plot data. The models will estimate the potential that different land-uses (agricultural, grassland, forests, urban etc.) and natural disaster (e.g. wildfires and floods) have as contributors. Future contributions and pollutant levels will also be estimated by the models, by utilizing climate change forecasts (IPCC predictions). The focus will be on nonpoint source pollutants that cause eutrophication in closed seas. The most vulnerable areas to erosion will be located with the use of indices developed in a GIS environment with the use of satellite images. Finally based on the areas identified by the indices, drone mapping will be applied at a smaller scale for the different land use/vegetation covers to more accurately identify the areas that are most likely to have high surface erosion risk and collect litter. In regard to pollutants and litter from stream bank erosion, traditional (e.g. erosion pins, cross-section surveys) and innovative methods (e.g. laser scanning) will be used at the plot scale along with the GIS Stream Bank Erosion Index that utilizes satellite images. Furthermore, drone mapping will be applied to capture more accurately the locations of litter gathering, sediment erosion or deposition. The use of drones for stream bank monitoring have not been utilized to its full extent. Overall, the surface and stream bank erosion methods applied at different scales will provide estimates of their potential contributions to the Black Sea. Riparian and watershed landuse/ vegetation covers and natural disasters (floods and wildfires) impacts that are major factors on their potential contributions will be assessed.