To What Extent Can a Sediment Yield Model Be Trusted? A Case Study from the Passaúna Catchment, Brazil

Soil degradation and reservoir siltation are two of the major actual environmental, scientific, engineering challenges. With trend world population increase, further pressure is expected on both water soil systems around world. are, however, strongly interlinked with erosion processes that take place in hydrological catchments, as consequences these processes. Due to spatial scale duration events, installation operation monitoring rather cost- time-consuming. Modeling a feasible alternative for assessing loss adequately. In this study, possibility adopting sediment stock validation measure monthly time-step input model was investigated. For assessment reservoir, commercial free-fall penetrometer GraviProbe (GP) used, while calculation yield calculated by combining revised universal equation (RUSLE)-based delivery ratio based connectivity approach. RUSLE factors, combination remote sensing, literature review, conventional sampling used. C Factor, satellite imagery from Sentinel-2 platform The Factor derived an empirical approach normalized difference vegetation index (NDVI), degree sealing, land-use/land-cover data. key research objective study examine what extent can be used validate long-term model, find out limiting factors regard. Another focus assess potential improvements modeling use such data showed good improve overall temporal performance also dictated opportunities using types reliable decision support sustainable catchment management protection measures.