Replenishment studies for riverbed and sand-mining projects
A replenishment study evaluates how sediment is deposited, transported and restored within a river or stream reach after extraction and seasonal flow events. For applicable sand-mining projects, the study supports decisions on sustainable extraction, mine planning and environmental management.
Study inputs
The exact methodology depends on the river system, mining lease, available historical information and regulatory requirement. Inputs can include channel geometry, cross-sections, sediment characteristics, extraction records, hydrological information, drone or DGPS survey data and observations before and after the monsoon period.
Typical work components
- Review of lease area, approved mining plan and extraction quantities
- River / stream reach mapping and cross-section survey
- Pre- and post-monsoon field observations where required
- Sediment and channel-change assessment
- Use of drone, DGPS and GIS information for spatial comparison
- Report preparation linked to the applicable mining and environmental requirement
Why survey consistency matters
Replenishment analysis becomes more useful when survey points, coordinate systems and comparison periods are consistent. Our Drone Survey / DGPS work can be coordinated with the replenishment-study scope so field information is collected for the intended analysis.