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Designing a network consisting of rising main and pumps

Hello,

I am designing a network which supplies water to about 150 villages. The network consists of both gravity mains and pumping mains (Rising mains). What are the steps for designing such a network?

Should i place a pump where i think pumping is required? I have already drawn a network consisting of both. But when i export that using modelbuilder, watergems considers both rising main and gravity main as normal pumped mains. How can this be resolved? 

Thanks

Adithya

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  • It appears you are starting with serving a new area.

    The first thing to do is draw a profile map sowing the elevation of each village. In this way you will be able to determine the hydraulic grade of each pressure zone. Then you can place any storage tanks. The area served from each tank will be roughly 30 to 80 m below the tank overflow. You can then place pumping stations and pressure reducing valves at the pressure zone boundaries. How uch elevation difference do you have across all of the villages.

    As long as the pipes are flowing full, it doesn't matter if they are fed by gravity or pumps. You don't want drinking water pipes to not remain full.

    It is good to have at least one tank per pressure zone so that if the pump station feeding it is shut down, water can still be supplied for a while.

    The WaterGEMS pressure zone manager is a great tool for laying out pressure zones and seeing how they should interconnect.

    Once you have laid out the pressure zones, then you can focus on sizing pipes and selecting pumps.

    Chapter 8 in our "Advanced Water Distribution Modeling and Management" book discuss this type of design problem.

    store.bentley.com/.../9781934493014--Advanced-Water-Distribution-Modeling-and-Management

    Answer Verified By: Sushma Choure 

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  • It appears you are starting with serving a new area.

    The first thing to do is draw a profile map sowing the elevation of each village. In this way you will be able to determine the hydraulic grade of each pressure zone. Then you can place any storage tanks. The area served from each tank will be roughly 30 to 80 m below the tank overflow. You can then place pumping stations and pressure reducing valves at the pressure zone boundaries. How uch elevation difference do you have across all of the villages.

    As long as the pipes are flowing full, it doesn't matter if they are fed by gravity or pumps. You don't want drinking water pipes to not remain full.

    It is good to have at least one tank per pressure zone so that if the pump station feeding it is shut down, water can still be supplied for a while.

    The WaterGEMS pressure zone manager is a great tool for laying out pressure zones and seeing how they should interconnect.

    Once you have laid out the pressure zones, then you can focus on sizing pipes and selecting pumps.

    Chapter 8 in our "Advanced Water Distribution Modeling and Management" book discuss this type of design problem.

    store.bentley.com/.../9781934493014--Advanced-Water-Distribution-Modeling-and-Management

    Answer Verified By: Sushma Choure 

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