CASE STUDY Project Summary Organization: Sabesp Solution: Water Network Analysis Location: São Paulo, Brazil Project Objective: • Supply water to the metropolitan region of São Paulo during extreme drought conditions. • Model various scenarios to identify a quickly achieved solution that limits any negative effects to 9 million customers. • Prevent further drawdown of the Cantareira system and supplement the water supply by taking advantage of the water producer systems’ interconnection. Products Used: WaterGEMS Fast Facts • Sabesp’s solution to transfer water to the Cantareira system prevented millions of customers from having their access to water reduced to two days per week. • Transferring water across five producer systems, reactivating pipelines, growing or reversing booster stations, altering control structures, and expanding water treatment plants mitigated the water crisis. • Water availability eliminated the immeasurable impacts of scarce supply, degraded water quality, and massive business closures. ROI • The integration of WaterGEMS, GIS, SCADA, and PIMS reduced data collection time by 70 percent and model calibration time by 80 percent, increasing overall crisis response time. • Sabesp spent 50 percent less time securing a viable solution using the WaterGEMS hydraulic modeling. • The ability to evaluate 80 scenarios enabled Sabesp to meet crucial deadlines and cut implementation costs. Sabesp Solves Water Crisis, Avoids Rationing for 9 Million São Paulo Customers Optimum Water Transfer Scenario Identified by Bentley’s WaterGEMS® Model in Half the Time Solving a Water Crisis Sabesp supplies water to more than half of the municipalities in the state of São Paulo, Brazil, including the 20 million residents of the metropolitan region of São Paulo. When a 16-month dry spell threatened the water supply from the Cantareira basin, the metro area’s main water source, Sabesp acted quickly to avoid water rationing that would be both unpopular and economically devastating. Using WaterGEMS to assemble and calibrate a hydraulic model of the entire water network, Sabesp evaluated 80 what-if scenarios before selecting an alternative that capitalized on the interconnection between producer systems. The solution allowed water to be transferred into the Cantareira system with minimal adjustments to infrastructure. Sabesp estimated that it took 50 percent less time to find a solution by modeling with WaterGEMS, the shortest hydraulic solution time the team of engineers and modeling specialists ever experienced. Critically Low Flow Sabesp is one of the world’s largest water and sewage services providers, with 24.8 million water supply customers and 21.3 million sewage collection customers in 366 municipalities. The state-owned company serves densely populated urban areas, where the availability of water and sanitation can be uneven. meters per second (m3/s), an amount half of the previously lowest recorded inflow rate. This extreme drought presented a dire situation for the nearly 9 million residents who relied upon the Cantareira reservoir for daily water use. The drought created the worst water crisis in nearly a century, calling for immediate action to impose unprecedented water restrictions until weather conditions improved and the drought subsided. Sabesp considered the drastic measure of limiting customer access to water to only two days per week. Such a rotation would not only be unpopular but also penalize customers at higher elevations, where low pressure would restrict flow. Other issues with rationing included threats to public health, such as poor sanitation and water quality associated with low inflow, and inadequate supplies for hospitals and fire protection. Instead, the company resolved to further integrate and optimize the regional water supply system, known as the Metropolitan Integrated System (SIM), to provide more equal distribution of available water. Running Supply Scenarios To discover a viable solution for distributing an adequate water supply to its customers, Sabesp Sabesp laid additional pipeline to expand the Metropolitan undertook a BRL 150 million Integrated System (SIM), the regional water supply system, project utilizing hydraulic in order to equally distribute available water to residents of modeling with WaterGEMS. São Paulo, Brazil. The engineering department created 80 scenarios to determine the best possible scheme Over a 16-month period from October 2013 to February for transporting drinking water to the affected areas. The 2015, Brazil experienced a prolonged period of extremely hydraulic model also revealed ways to use available water low rainfall, along with unusually high temperatures. This more efficiently, such as reducing consumption, curtailing produced an alarming water shortage in the city of São water loss by identifying and fixing leaks more rapidly by Paulo, where water reservoirs dropped to historically low increasing the partitioning of the water network into district levels and a fraction of their capacity. The inflow rate into metered areas, and by decreasing water pressure. the Cantareira reservoir d

“We have been using the WaterCAD/ WaterGEMS model for several years. The software and the Bentley team have effectively helped us in solving problems in the metropolitan region of São Paulo, which is one of the most complex in the world.” – Viviana Marli Borges, Engineer, Sabesp Find out about Bentley at: www.bentley.com The project’s success relied upon an accurate simulation of the complex water supply system. Comprising 177 reservoirs and 1,300 kilometers of pipeline, the SIM has the capacity to produce water at a rate of 73 m3/s at nine water treatment plants. The distribution network includes...