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Water and Sewer System Hydraulic Modelling and Master Planning


Client System
Brunswick County, North Carolina, USA
GLS acted as specialist consultant to HDR Consulting Engineers to perform planning of the bulk water supply system serving this rapid developing area along the US east coast.
266 km bulk water pipes.
Buffalo City Municipality
GLS perform hydraulic modelling and master planning of the water distribution system.
2 900 km water pipes.
AADD 95 000 kL/d.
City of Cape Town
GLS has been performing master planning in this area since 1990 and is currently appointed to update the master planning and MIS on a continuous basis. The services provided by GLS include performing of UAW analyses and evaluating of development proposals.
650 km bulk water pipes.
10 350 km water pipes.
8 900 km sewer pipes.
AADD 800 000 kL/d.
City of Tshwane Metropolitan Municipality
GLS has been performing master planning in this area since 1996 and is currently appointed to update the master planning and MIS on a continuous basis. The services provided by GLS include performing of UAW analyses and evaluating of development proposals.
850 km bulk water pipes.
8 550 km water pipes.
9 000 km sewer pipes.
AADD 750 000 kL/d.
City of West Vancouver (BC, Canada)
GLS in partnership with a Canadian firm did water demand modelling including tariff analyses and meter verification using SWIFT. A dedicated web-based solution was developed for the client and is updated on a monthly basis.
20 000 meters almost all read via wireless technology.
Ekurhuleni Metropolitan Municipality
GLS has been performing master planning for the water and sewer systems in this area since 1989 and has been updating the master planning and MIS for the entire area serviced by EMM on a regular basis. The services provided by GLS include performing of NRW analyses, system redundancy analysis and evaluating of development proposals.
10 100 km water pipes.
9 000 km sewer pipes.
AADD 880 000 kL/d.
Greater Vernon Water (BC, Canada)
GLS in partnership with a Canadian firm did water demand modelling using SWIFT, compiled water models and performed various network separation studies to split the irrigation network from the domestic network using WADISO.
615 km of water pipes with 82 pumps and 93 PRVs
Johannesburg Water
GLS has been performing master planning for the water and sewer systems in this area since 1991 and is currently appointed to update the master planning and MIS for the entire area serviced by JW on a continuous basis.
11 400 km water pipes.
10 740 km sewer pipes.
AADD 1 400 000 kL/d.
Khara Hais Municipality
GLS performed modelling,analysis and master planning for the water and sanitation systems.
250 km water pipes.
180 km sewer pipes.
AADD 30 000 kL/d.
Magalies Water – Vaalkop system
GLS has recently completed a modelling and master planning study for the Vaalkop bulk supply system, and is currently appointed to manage the information on an ongoing basis.
473 km bulk water pipes. AADD 170 000 kL/d.
Magalies Water – Temba, Wallmannsthal, Cullinan
Magalies Water also acts as water systems operators for the Temba, Wallmannsthal and Cullinan systems which are included in GLS projects for the City of Tshwane and Nokeng Local Municipality (in Metsweding District Municipality).
473 km bulk water pipes. AADD 170 000 kL/d.
Mbombela Municipality
GLS performed modelling,analysis and master planning for the Nelspruit, White River, Hazyview, Kanyamazane and Matsulu water and sanitation systems.
840 km water pipes.
560 km sewer pipes.
AADD 54 000 kL/d.
Mbombela Municipality (Silulumanzi concessionaire)
GLS has updated the water and sanitation modelling,analysis and master planning for the Nelspruit area of Mbombela, which is currently being operated under concession by Silulumanzi.  Updating of the Matsulu area is currently in process. GLS is currently appointed to update the master planning and MIS on a continuous basis. The services provided by GLS include performing of UAW analyses and evaluating of development proposals.
 
Metsweding District Municipality (Nokeng&Kungwini)
GLS has been performing master planning in this area since 2004 and is currently appointed to update the master planning and MIS on a continuous basis. The services provided by GLS include performing of UAW analyses and evaluating of development proposals.
600 km water pipes Kungwini.
420 km water pipes Nokeng.
440 km sewer pipes Kungwini.
140 km sewer pipes Nokeng. AADD 35 000 kL/d Kungwini.
AADD 30 000 kL/d Nokeng.
Randfontein Municipality
GLS has since 1993 been updating the modelling and master planning of the water and sewer systems on a regular basis and perform evaluation of development proposals.
420 km water pipes.
400 km sewer pipes.
AADD 24 000 kL/d.
Sedibeng District Municipality
GLS performed hydraulic modelling and master planning of the water and sewer systems for the all municipalities in the district, namely Lesedi, Mfuleni and Midvaal.
3 700 km water pipes.
2 900 km sewer pipes.
AADD 240 000 kL/d.
Sedibeng Water Board
GLS acts as specialist sub-consultant in a team that is currently planning the required upgrade of the Vaal Gamagara bulk supply scheme to accommodate large anticipated growth in water demand in the mining areas of the Northern Cape.
370 km water pipes.
AADD 45 600 kL/d
Western Cape Municipalities
GLS have been performing master planning for several towns in the Western Cape Province since 1990. Under initiative and with support of DPLG and DWA master planning of water and sewer systems and establishing of MIS have been completed for all towns in the Province. Through funding by DWA GLS performed a detailed study on evaluating the backlog for water and sanitation in the Province and the required interventions for eradication thereof. GLS is currently appointed at several of the Municipalities in the Province to update the master planning and MIS on a continuous basis.
6 000 km water pipes.
4 800 km sewer pipes.
AADD 420 000 kL/d.
West Coast District Municipality
GLS performed master planning of this bulk water supply system.
994 km bulk water pipes. AADD 59000 kL/d.
Windhoek Municipality
GLS acted as specialist sub-consultant responsible for performing hydraulic modelling of the bulk supply system. The analysis included investigation of groundwater recharge options and mixing of water from different sources.
124 km bulk pipes.
AADD 53 000 kL/d.

Water Demand Management Strategies


Client
City of Tshwane Metropolitan Municipality
GLS is part of the team that established a Water Demand Management Strategy for the city, being responsible for the analysis of water consumption statistics, performing water balance analyses and assessment of water tariff structure options through income analyses.
Johannesburg Water
GLS assisted in the identification and prioritisation of measures to be implemented by Johannesburg Water as part of the overall WDM strategy and programme.
Western Cape Municipalities
Through funding by DWA and DPLG GLS established water demand strategies for each town in the Western Cape Province separately. The strategies included the standard water loss reduction measures but also other aspects, such as the investigation into water re-use potential for large industries. Specific attention was paid to the expected effect of adjusted step tariffs for water purchases by consumers, including making allowance for price elasticity.
Ubuntu Municipality
GLS acted as specialist consultant to KV3 Consulting Engineers to perform analyses of water consumption statistics and unaccounted-for-water for the four largest towns in this municipality. GLS further assisted in identifying and prioritizing water loss reduction and demand management strategies for each town.

Pipe Replacement Prioritization


Client
City of Tshwane Metropolitan Municipality
GLS applied the risk based algorithms developed by the company to determine water pipe replacement prioritization for the more than 9 400 km bulk and distribution systems in the municipality.
Ekurhuleni Metropolitan Municipality
The analysis for the prioritization of the refurbishment and replacing of 10 100 km of water pipes, 9 000 km of sewer pipes and more than 6 500 km of storm water pipes in the municipality’s jurisdiction area is currently being performed by GLS.
Johannesburg Water
The analysis for the prioritization of the assessment, refurbishment and replacing of 10 100 km of water pipes, 9 000 km of sewer pipes in Johannesburg's jurisdiction area was performed by GLS and updated on a regular basis.
Overstrand Municipality
GLS applied the risk based algorithms developed by the company to determine water pipe replacement prioritization for the 740 km pipes comprising all the distribution systems in the municipality.
Vitens (Netherlands)
GLS applied the risk based algorithms developed by the company and a Dutch partner to determine and simulate water pipe replacement prioritization for the 47 000 km pipes comprising all the distribution systems of the water authority.
 
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