Study of the Impact of Long-Term Degradation of the Tigris River on Al-Nuhairat Bridge Foundation in Basrah Governorate

Abstract

This research examines the long-term deterioration of the Tigris River at Al-Nuhairat Bridge in Basrah Governorate, using the Hydraulic Toolbox software developed by the Federal Highway Administration (FHWA). The study aims to investigate the erosion dynamics resulting from varying flow conditions and sediment transport. Hydraulic data was obtained from Basrah Irrigation Directorate. The data collected was used to conduct comprehensive analyses to predict erosion depth and armor thickness, and to understand the hydraulic hazards that could threaten the bridge's future stability. The results show that water flow and sediment transport significantly impact the stability of the bridge's foundations over time. The study also demonstrates that implementing erosion control strategies and improving engineering designs can enhance the bridge's ability to withstand hydraulic forces around its foundations in areas experiencing fluctuating hydraulic conditions.