Surface Water Management

By: Enbitec  11-11-2011
Keywords: Pollution

1. Background

Over the past several years national and local government has enacted laws and regulations to safeguard the water systems & catchments against damaging pollutants, thereby forcing all users of the water to respect their civic responsibility. Such regulation is similar to the strict illegality of disposal of effluent into the storm-water drains, which causes pollution of rivers and ground water and degradation of communal amenities.
ENBITEC can offer a turn-key solution to our client with regards to Surface water management. This will include but is not limited to Auditing, Design Facilitation, Installation, Implementation, Construction and supply of various services and products. ENBITEC will offer the client a quality product/service that is not only cost effective but also sustainable and offer a return on investment.

2. Legislative And Statutory Guidelines

• DWAF – Best practice guide for surface water management.
• National Water Act
• GN 704
• ISO 14001
• NEMA
• SANS 10 400:P – Sewage and Drainage Discharge
• SANS 10 252-2 – Grease Traps
• SANS.50858-1&2 – Oil Separators

3. Effects Of Poor Surface Water Management

• Downstream contamination of natural watercourses due to runoff or spillage of contaminated storm water.
• Flooding, with the resulting damage to property, land and potential loss of life.
• Loss of catchment yield in addition to large volumes of water to the water balance when optimal runoff of clean storm water is not achieved.
• Erosion of beds and banks of waterways.
• Increased recharge through spoils or fracture zones, unnecessarily increasing the water volume that comes into contact with contaminants.

4. General Principals Of Surface Water Management

• Clean water to be kept clean and routed to natural water course
• Dirty water to be collected and contained in separate system with minimum spillage or seepage risk, in combination to point of source pollution control.
• Surface Water Management Plan must be sustainable over life of operation cycle and different hydrological cycles
• All statutory requirements and stakeholders must be considered and incorporated

5. The components of surface water management can be summirized as follows:

1. Gravity Effluent Separation
2. Sewage Treatment
3. Sediment Traps
4. Storm Water Systems
5. Water Purification
6. Cut-Off Drains
7. Pollution Control Dams

Keywords: Pollution