Global Engineering Solutions Review

Erosion and accretion of channels are among the central geomorphological processes that redefine the Blue Nile path, namely with respect to Wad-Medani to El-Kamlin section in Sudan. Such transformations are very dangerous to adjoining agricultural lands, infrastructures, and settlements. This research aims to analyze the geomorphological Change of the Left Bank of the Blue Nile Between Wad-Medani and EL-Kamlin using GIS techniques from 1986 to 2020. The satellite images covering the same span and captured by Landsat satellite were also processed and the Digital Shoreline Analysis System (DSAS) was used to quantify measures of shoreline change. The envelope of shoreline change (SCE) varied 2-1273 m and the net shoreline movement (NSM) varied -719 to 1273 m and the end point rate (EPR) varied -21 m/year (erosion) to +37 m/year (accretion). The maximum accretion rate was recorded as 37.45 m/year whereby the average rate was 5.86 m/year. The mean erosion value was -21.14 m/year with std= 1.55, mean accretion was + 2.5 m/year with std = 0.06 and the average ratio of both erosion and accretion values was -9.06. Predictive analysis also shows that the villages located close to the right bank of the river, with a distance of 4 kilometers, can become more vulnerable in the future due to the current occurrence of bankline migration. The results of this study offer new information about the dynamics of different riverbanks in Sudan and lay the ground to proper management of rivers, planning of land resources, and the development of a disaster mitigation plan of action.