What Technical Factors Determine Whether a Site Needs Wellpoint or Deep Well Systems with AER?

Choosing the correct dewatering system is one of the most crucial decisions during the early stages of a construction project, especially in regions like the UAE, where groundwater conditions can vary significantly from one site to another. Among the most commonly used methods are wellpoint systems and deep well systems, each suited to very different technical scenarios.

But how do engineers, consultants, and contractors know which solution to implement?

Let’s break down the key technical factors that influence this decision and how Arabian Equipment (AER) supports clients in getting it right from the outset.

1. Soil Type and Permeability

The soil composition plays a major role in determining which system is more effective.

• Wellpoint systems are typically used in coarse silts, sandy soils and fine gravels, where water flows slowly through the ground. These soils allow for multiple shallow drawdowns over a wide area.

• Deep well systems are preferred in more permeable soils, such as coarse sands and gravels, where larger volumes of groundwater need to be pumped from greater depths.

AER conducts thorough site assessments, including borehole testing, to ensure the system matches the ground’s hydraulic conductivity.

2. Excavation Depth

Depth is another major consideration:

• Wellpoint systems are ideal for shallow excavations, generally up to five to six metres below ground level.

• Deep wells are used for deeper excavations, typically beyond six to seven metres, where water needs to be drawn from a lower aquifer or where a single point of suction is not effective.

AER’s technical team advises contractors during design reviews, often proposing hybrid systems for projects with phased depth increases.

3. Required Pumping Rate

The volume of water to be removed per hour or day also impacts the system selection:

• Deep wells are suited for high flow rates, allowing fewer units to handle greater volumes.

• Wellpoints work best for moderate flow but can be installed in multiples for wide-area control.

Choosing the wrong system could result in underperformance or excessive operating costs. AER uses digital flow modelling and site simulations to estimate pumping needs in advance.

4. Site Layout and Access

Sometimes the decision is not just technical but also logistical.

• If the site has tight access, limited space or built-up surroundings, wellpoints may be easier to install.

• Deep well systems, on the other hand, require vertical drilling equipment and space for power packs or generators.

AER helps project teams assess feasibility, especially in urban or road-adjacent infrastructure works across the UAE.

5. Duration of Dewatering

Project timeline also matters:

• Wellpoint systems are easier to relocate and often more cost-effective for short-term or mobile operations.

• Deep wells are better suited for long-term installations, particularly when the water table remains high throughout the project duration.

Getting It Right with AER

Choosing between wellpoints and deep wells is not guesswork, it is a matter of engineering precision. Arabian Equipment works closely with contractors and consultants from the earliest planning phases to deliver the most effective and cost-efficient solution based on site data, performance goals and practical constraints.

Whether you are planning a foundation excavation, road corridor, pumping station or utility trench, the right dewatering method starts with the right partner.