The speed at which sand moves in the Saudi desert is quite high. The moment you start reducing the groundwater, the loose sand gradually shifts towards the suction line. This leads to pumps being affected, excavation failure, and a delay in the project. We have witnessed this on actual projects, and we are certain about one thing: your well point dewatering system must be able to deal with sand control from the first day.

In desert construction projects, the soil composition is usually a mixture of fine sand and silt. When the groundwater moves towards the wellpoint screen, this mixture also moves along with it. If your system is not properly filtered and spaced, the sand will enter the pipeline. This is referred to as “sand-in,” which can lead to the reduction of the life of your pumps and even result in uneven ground settlement beneath the foundation.

1. Why a Strong Well Point Dewatering System is Important

You cannot consider dewatering as just a water extraction process. In the Saudi desert environment, you have to think about stability and long-term efficiency. A rightly designed well point dewatering system will reduce groundwater evenly in the area. It will regulate water flow without affecting soil stability.

With proper suction header pipes, strong wellpoints, and effective pumps, you can maintain stable pressure within the system. Balanced suction will prevent soil collapse around the wellpoint tips. We always recommend that you carefully design the system. Even wellpoint spacing will provide balanced drawdown and prevent high-velocity soil movement.

2.                Managing Sand Entry At The Source

Gravel packing is definitely important, but the key is system design. A good, well point dewatering system involves well-designed screens that correspond to the soil type. Proper slot size on the screen prevents excessive sand entry while facilitating easy water passage.

In extremely loose desert soils, you may also consider cased wellpoints. These offer additional strength and protection to the borehole wall. By considering the right screen design and installation depth, you can minimise sand entry.

3.                Protecting Pumps from Damage

Sand particles damage the impellers and reduce their efficiency. Sand particles also raise the maintenance cost and cause unexpected shutdowns. A well-installed well point dewatering system prevents damage to pumps by reducing the entry of abrasive material into the suction line.

At Cosmos Pumps, we emphasise overall system performance. We offer a wellpoint dewatering system, which works for desert construction projects in the Middle East. Our systems use efficient pumps combined with strong piping systems and corrosion-resistant materials that function properly in difficult environments.

4.                Preventing Ground Subsidence

Loss of soil causes ground settlement. When sand flows out continuously, empty spaces are created under the ground. This causes the foundation, roads, and buried utilities to weaken from below.

To avoid this problem, you can implement a well point dewatering system designed and installed in a way that reduces the groundwater level at a constant rate. This will ensure that the soil doesn’t move aggressively. The system will also ensure that the surrounding soil is compact and stable. 

Why Choose Cosmos Pumps for Saudi Projects

We are familiar with the difficulties of working in the desert because we have been working with contractors in the Saudi region. The project evaluation leads us to recommend the most suitable design solution for your needs. 

We provide you with superior equipment, expert guidance, and specially developed systems for Saudi desert conditions. With the best well point dewatering system, you can control the sand, protect your pumps, and ensure that the ground is stable throughout the period.

Also read: 𝐎𝐧𝐞 𝐬𝐢𝐭𝐞. 𝐓𝐰𝐨 𝐫𝐞𝐚𝐥𝐢𝐭𝐢𝐞𝐬.

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