## 6 Conclusions  
In this study, a coupling of effective models and statistical methods was applied to prove the usefulness of remote sensing and geospatial analysis techniques in understanding the watershed behaviors and evaluating the relative tectonic activity and soil erosion priorities of 15 sub-basins of the Wadi Al-Lith basin. Different drainage basins provide different tectonic signals and hydrological conditions due to their morphological, hydrological, and soil characterizations. Thus, studying and investigating drainage basins plays a very important role in tectonic evolution and watershed management plans. The geomorphological signatures extracted via the analysis of the areal, linear, and relief aspects present consistency with the behaviors of the drainage basins. In addition, they assist in defining the relative tectonic activity classes and prioritization of different hydrological units. In the current study, the steps in terms of delineating the 15 sub-basins and quantifying the morphotectonic and morphometric parameters were explained through geospatial programs and high-spatial-resolution data. Then, effective techniques or models, relative tectonic activity (RTA), and weighted sum analysis (WSA) schemes were applied and formulated successfully in classifying the sub-basins in terms of relative tectonic activity and soil erosion prioritization. The relative tectonic activity model presented three classes of activity. Sub-basins 5, 6, 13, and 15 showed high tectonic activity signals, while the northern and southern parts provided moderate signals of tectonic activity. The WSA analysis suggested that sub-basin 5 presented a first-class soil erosion priority due to the integrated analysis. Priority classification helped in detecting the conceivable zones for further management under the prevailing hydrological and geomorphological conditions. The final prioritization ranks suggested that sub-basins 5, 6, 10, 13, and 15 fell within the high-soil-erosion zone. This indicated potential regions to be considered for preferential water-saving and soil conservation efforts for effective and accurate future planning in relation to drainage management. This is consistent with the RTA model that shows high tectonic activity signals with the same sub-basins. Therefore, precisely detecting the potential region for conservation management can provide favorable conditions in terms of sustainable development and the initiation of scale measures in similar regions. Integrating remotely sensed data, geospatial techniques, and statistical computation extracted as proof of the relative tectonic activity and weighted sum analysis is one of the advanced and effective methods in seismic hazard assessment and prioritization strategies. Moreover, this study presents useful data and information for decision makers, aiding them with a comprehensive model of seismic hazard assessment and soil erosion priority zonation of the Wadi Al-Lith basin along the Red Sea coast of Saudi Arabia. Therefore, this could be applied to other basins, particularly to those whose hydrological, geomorphological, and soil erosion processes are not well studied. Conceptualization, B.B. and A.A.; methodology, B.B. ; software, A.A.; validation, B.B. and A.A.; formal analysis, B.B. ; investigation, A.A.; resources, B.B. ; data curation, B.B. ; writing--original draft preparation, B.B. and A.A.; writing--review and editing, B.B. and A.A.; visualization, B.B. ; supervision, A.A.; project administration, B.B. and A.A.; funding acquisition, B.B. and A.A. All authors have read and agreed to the published version of the manuscript. **Funding:** This research was supported by the Researchers Supporting Project number (RSP2023R296), King Saud University, Riyadh, Saudi Arabia. **Institutional Review Board Statement:** Not applicable. **Informed Consent Statement:** Not applicable. **Data Availability Statement:** Data are contained within the article.