DRAINAGE NETWORK LAYOUT USING UAV DATA

Abstract

Water supplies must be used properly and sustainably as a result of the world's population increase and the effects of climate change. Digital Elevation Model (DEM) data can build highly accurate drainage networks. (UAVs), DEMs can be generated quickly, reliably, and precisely. The path, length, and drainage area of this study has been calculated to avert potential flood disasters. We discovered after conducting a study that drains are not constructed in accordance with the terrain. We always prioritize drain slope and depth. However, a perfect slope cannot be created if geographic conditions and elevations are not taken into account. Because all of a city's flash flood issues are caused by an improper drainage system that was built without a master plan, the problem is becoming more complex by the day. In our study, we discovered that small drains with no slope are used to connect to larger main drains. However, according to our studies, after connecting the small drain, water flows backward from the main drain due to elevation differences. Our studies show that if the secondary drain was not man-made, it should have been routed in its natural direction; however, what we really do was forcefully connect the secondary drains to the primary drain that was closest to that. Along with the effect of DEM resolution on terrain attributes, the effect of flow accumulation frequency values on stream characterization and watershed delineation was investigated. High-resolution DEMs and low flow accumulation are compatible. The obtained high-resolution topography data revealed patterns of surface flow-induced soil erosion, as evaluated by the Relative Path Impact Index (RPII).