Sedimentation Survey — Masalamia Canal

Project Overview

A precision field survey of the 87 km Masalamia main canal — a primary distribution canal within the Gezira scheme — to quantify sedimentation and inform dredging prioritization. ADCP discharge measurements at 22 cross-sections were combined with GPS-RTK bathymetric profiling to produce a continuous sediment volume model. AutoCAD Civil 3D surface generation and HydroSurv processing produced volume estimates at 500 m intervals, identifying 14 critical deposition zones requiring immediate intervention.

Methodology

1. 01ADCP (SonTek FlowTracker) discharge measurements at 22 cross-sections
2. 02GPS-RTK bathymetric profiling — 1.5 m grid spacing across full 87 km reach
3. 03AutoCAD Civil 3D 3D surface and volume calculation
4. 04HydroSurv post-processing for raw ADCP data integration
5. 05Leica Total Station benchmark establishment at each cross-section
6. 06Sediment grain size analysis at 45 sampling locations

Key Outputs

• Full canal sedimentation budget and 3-year dredging maintenance plan
• 22 cross-section profiles with sediment depth contours
• 14 critical deposition zones flagged for priority intervention
• Volume-cost optimization model for annual dredging programme

Full canal sedimentation budget produced — informed 3-year maintenance plan