The month of August is a good time for Scheme Managers to begin their preparations for the aquatic weed season that lies ahead (August to May). The impact that algae and aquatic plants have on canal systems need no introduction to South African Managers of irrigation schemes.
ENVIROKONSULT is busy implementing preventative maintenance programmes on irrigation schemes with algae and water plant problems on a national scale. These programmes involve the chemical treatment of affected canals on a predetermined frequency to keep the system free of aquatic plants and algae for the whole season.
As you are aware, the impact of a clean canal on the operation and maintenance of an irrigation scheme is astounding. Optimum capacity is maintained throughout the irrigation season to supply water quotas on demand. A canal that overflows is something of the past and the resulting damage to the infrastructure is restricted.
ENVIROKONSULT's services to Scheme Managers include the following:
Canal treatment: Canals and balancing dams are chemically treated on a fixed programme (designed to each scheme's unique needs) to control algae and aquatic plants. The purpose of the programme is to reduce biomass throughout the system to the absolute minimum in order to ensure maximum capacity and optimum operation of the system at all times.
Balancing dam maintenance: Aquatic weeds in balancing- and irrigation dams are controlled by chemical treatments and / or sterile grass carp. These herbivorous fish make quick work of aquatic plants and keep the dams clean for long periods at a low cost. This ensures design capacity and prevents the contamination of downstream canal infrastructure.
Water Quality Monitoring Programme: Water quality is increasingly becoming important to the irrigation industry. It is expected of irrigation scheme managers to implement a water quality monitoring programme and to keep it operational. Water quality reports should be provided to the Department of Water Affairs on a regular basis. Furthermore, it is expected from the farmers who supply products to overseas markets, to provide a water quality report as part of their GlobalGAP requirements. ENVIROKONSULT can implement a water quality monitoring programme based on your requirements and provide the scheme manager with regular interpretive reports.
Servitude Maintenance: ENVIROKONSULT can assist with the maintenance of canal servitudes by removing unwanted vegetation (chemical and /or mechanical) in order to ensure free access to canal infrastructure. Our expert staff will also design and manage a servitude maintenance programme for your scheme. This programme includes the control of bush encroachment, mowing, chemical control of weeds, pioneers, trees and shrubs.
I would like to take this oppurtunity to welcome the following schemes as part of our family:
Orange Riet River Water Users Association (Jacobsdal)
Vanderkloof Water Users Association (Vanderkloof)
Mooi River Government Water Scheme (Lakeside Canal; Klerkskraal Canal; Boskop Canal; Gerhard Minnebron Canal)
Schoonspruit Government Water Scheme
Njelele Irrigation Board (Tshipise)
Pienaars River Government WaterScheme (Roodeplaat)
Lindleyspoort Government Water Scheme
Marico Bosveld Irrigation Board
Department of Water Affairs - Term Contract
The Department of Water Affairs and Sanitation appointed ENVIROKONSULT in January 2014 to implement the preventive maintenance programme for the control of unwanted aquatic vegetation in departmental canal systems.
Water User Associations and Irrigation Boards are also welcome to join this programme. You are invited to view our full service list on our new website at www.envirokonsult.co.za.
Best wishes to all our Scheme Managers for an algae free season!
KOBUS DU PLESSIS
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