Integrated Flood Risk Management Approach Using Mesh Grid Stability and Hydrodynamic Model

Today, inhabitants residing in floodplains face a serious and perpetual threat of flooding. Flooding causes fatalities considerable property damage metropolitan areas. Therefore, robust structural measures need to be adopted eliminate flood catastrophe. Structural the floodplain are most promising solutions. However, there cost-associated factors for proposing retention plan. Navsari city (98.36 km2, area extent) Gujarat was used as case study investigate impact mesh grid structures (100 m, 90 50 m) along with preparation The HEC-RAS 2D hydrodynamic model performed Purna River. output characterized by four different scenarios: (i) Without weir levees (WOWL), (ii) With (WW), (iii) (WL), (iv) (WWL). statistical parameters (R2, RMSE, NSE, inundation time, area) were determined evaluate accuracy. outcome revealed that m size exhibited more accurate results, yielding high NSE R2 values (0.982 0.9855), low RMSE value (0.450 m), smaller (114.61 km2). results further WW scenario effective measure it delayed water up 16 h, managed WOWL case. Moreover, mean error (WW scenario) estimated from profiles 1 2 ranged (−0.7 0.62) (−0.1 0.02 respectively, which evaluated very when compared other scenarios. novel scenario-based plan emphasizing stability using can applied any region around globe recommend efficacious decision making systems.