GLOBAL STANDARDS. AFRICAN EXECUTION.
Engineering-Grade Turbidity Silt Curtains for African Conditions
Designed for sediment containment, environmental protection and regulatory compliance in high-demand hydraulic environments.
Engineering-Grade Turbidity Curtain Systems for Africa
Geosynthetics Africa’s Silt Curtain and turbidity Barriers are high-performance sediment containment systems designed for hydraulic, marine, mining, dredging and civil construction environments where turbidity control is mandatory for environmental compliance and operational safety.
Engineered for durability, stability and rapid deployment, these floating containment systems provide reliable sediment isolation across calm, flowing and offshore water conditions.
ENGINEERED PERFORMANCE CLASSIFICATIONS
Our Silt Curtian systems are supplied in internationally recognised design classes matched to hydrodynamic conditions:
| Class | Risk Level | Conditions | Typical Use |
|---|---|---|---|
| Class 1 | Low | Calm water | Ponds, lagoons, canals |
| Class 2 | Medium | Moderate flow | Rivers, harbours |
| Class 3 | High | Strong forces | Open sea, tidal zones |
| Heavy Duty | Extreme | Long-term harsh conditions | Offshore / marine works |
CORE ENGINEERING SPECIFICATIONS
The GS Silt Curtain is engineered as a specification-grade turbidity barrier system for civil, marine, mining and environmental projects across Africa.
Our Silt Curtain systems are built using marine-grade components designed for long-term reliability:
Floatation System
Closed-cell polyethylene foam
Oil-resistant and crumble-resistant
Float sizes from 50 mm to 200 mm depending on class
Float Chamber Fabric
400 gsm, 600 gsm or 900 gsm UV-stabilised PVC
Temperature range −30°C to +70°C
Self-extinguishing fire-retardant properties
Skirt Material
260 gsm nonwoven geotextile
90-micron pore size
Flow rate >160 L/m²/sec
Structural Reinforcement
Polyester tensile webbing (1–2 tonne rating)
Stainless steel hardware
Aluminium ASTM F962 Z-connectors
Ballast System
Continuous galvanised chain ballast in PVC pocket
GS Silt Curtain Specification Table by Class
| Specification | Class 1 | Class 2 | Class 3 | Heavy Duty |
|---|---|---|---|---|
| Risk Level | Low | Medium | High | Extreme |
| Typical Conditions | Calm water | Moderate flow | Strong currents | Harsh marine |
| Float Size | 100×50 mm | 100×100 or 150×150 mm | 150×150 mm | Engineered |
| Float Diameter | ~50 mm | 140–210 mm | ~210 mm | Custom |
| Skirt Fabric | 260 gsm nonwoven | 260 gsm nonwoven | 260 gsm nonwoven | Project-specific |
| PVC Float Chamber | 400 gsm | 400–610 gsm | 900 gsm | Engineered |
| UV Resistance | Standard | Medium | 5-year | Custom |
| Reinforcement Webbing | Optional 25 mm (1T) | 50 mm (2T) | 3× 50 mm (2T) | Engineered |
| Ballast Chain | 6 mm | 6 mm | 8 mm | Engineered |
| Connectors | Bowshackle | ASTM Z-connector | ASTM Z-connector | Custom |
| Deployment | Short-term | Medium duration | Long duration | Long-term |
| Max Depth Capability | ≤6 m typical | ≤12 m | ≤20 m | Project-specific |
Curtain Class Selection by Water Conditions & Depth
| Water Environment | Skirt Depth | Class 1 | Class 2 | Class 3 | Heavy Duty |
|---|---|---|---|---|---|
| Still Water | 1–2m | ✓ | |||
| Still Water | 2–6m | ✓ | |||
| Still Water | 6–12m | ✓ | ✓ | ||
| Still Water | >12m | ✓ | ✓ | ||
| River / Port | 1–2m | ✓ | |||
| River / Port | 2–6m | ✓ | ✓ | ||
| River / Port | 6–12m | ✓ | ✓ | ||
| River / Port | >12m | ✓ | ✓ | ||
| Harbour | 1–2m | ✓ | |||
| Harbour | 2–6m | ✓ | ✓ | ||
| Harbour | 6–12m | ✓ | ✓ | ||
| Harbour | >12m | ✓ | ✓ | ||
| Open Ocean | 1–2m | ✓ | |||
| Open Ocean | 2–6m | ✓ | ✓ | ||
| Open Ocean | 6–12m | ✓ | ✓ | ||
| Open Ocean | >12m | ✓ | ✓ |
Engineering Selection Rule
Curtain configuration must always be selected using project-specific hydraulic data. Selection tables are preliminary guidance tools only and final design should be confirmed by engineering assessment.
CONFIGURATION CAPABILITIES
Depths available up to 20 metres
Modular sectional construction
Rapid deployment handles at intervals
Custom lengths and depths available
Optional external floats for harsh environments
Standard manufactured sections are typically 20 m lengths, configurable to site requirements.
APPLICATION ENVIRONMENTS
Our Silt Curtain systems are specified for:
Dredging containment
Dam construction
Mining sediment control
Coastal engineering
Bridge works
Harbour construction
Environmental remediation
Desalination outfalls
Shoreline stabilisation
Engineered Silt Curtain Systems for Demanding Water Conditions
High-Performance Silt Curtains Designed for Hydraulic Stability & Compliance
Our turbidity barriers are engineered for sediment containment in rivers, dams, marine and dredging environments where durability, flotation stability and tensile strength are critical.