Sustainable yield study based on pumping test data, Stabio (TI, CH)

PURPOSES

The Municipality of Stabio intends to extract water for thermal use (district heating) and re-inject it into the aquifer. Two test wells, P1 and P2, have been drilled, with flow rates of up to 1000 l/min for well P1 and 700 l/min for well P2. In well P1, the aquifer is under pressure, while in P2 it is not. The Municipality of Stabio aims to reach a pumping rate of between 3,000 and 4,000 l/min.

CLIENT

GEOLOG.CH, 2024.

WHAT WE DID

A 3D model was built, calibrated using the recorded data from the pumping tests, and then used to simulate scenarios with increased pumping rates by a factor of 4. A new well geometry, with wells of 800mm in diameter, was also tested. The simulations provided insights into the radius of influence and the corresponding drawdown for these scenarios.

Dewatering of Hassyan IWP construction site (UAE)

PURPOSES

Hassyan seawater reverse osmosis (SWRO) independent water project (IWP) is a major proposed water supply project to serve the Emirate of Dubai in the UAE. The proposed pumping station for the project requires a deep excavation (about 14 m depth), which in turn will need dewatering of groundwater during excavation. The pumping station position close to the coastline, which incorporates a Ramsar site, has prompted the need for a groundwater model, to understand impacts on nearby sensitive ecological receptors.

CLIENT

Aquageo International Consultancy, 2024.

WHAT WE DID

We enabled a realistic and dependable dewatering impact assessment of construction on groundwater levels at the sensitive habitat using a working 3D hydrogeological numerical model approach.

Sewage Treatment Plant “IDA-Giubiasco” (TI, CH), 2024

Dewatering works for the amplification of the sewage treatment plant “IDA-Giubiasco” (TI, CH)

PURPOSES

The analyze of solutions for lowering groundwater levels in a 28x38m excavation area with a 7m variation. This includes estimating inflows into the excavation pit and proposing alternatives.

CLIENT

GEOLOG.CH, 2024.

WHAT WE DID

We enabled realistic and dependable assessment of dewatering needs (pumping rates volumes) to model and cross-compared various scenarios using a working 3D hydrogeological numerical model approach. A solution combining a pumping system, such as dewatering pumps, at the bottom of the excavation pit and “sheet piles” around the excavation pit has been studied.

Sewage Treatment Plant “IDA-Vacallo” (TI, CH), 2024

Dewatering works for the amplification of the sewage treatment plant “IDA-Vacallo” (TI, CH)

PURPOSES

The analyze of solutions for lowering groundwater levels in a 21x30m excavation area with a 3m variation. This includes estimating inflows into the excavation pit and proposing alternatives.

CLIENT

GEOLOG.CH, 2024.

WHAT WE DID

CASE 1: Pumping system, such as dewatering pumps, at the bottom of the excavation pit.
CASE 2: Pumping system, such as dewatering pumps, at the bottom of the excavation pit, and “jetting columns” around the excavation pit.
CASE 3: Pumping system, such as dewatering pumps, at the bottom of the excavation pit, with secant piles along the road to block water along the river axis.
CASE 4: System of 23 wells with “deep wells” type pumps along the road to block water along the river axis.

NEOM Dewatering Environmental Impact Assessment (KSA), 2023-2024

NEOM Dewatering Environmental Impact Assessment

PURPOSES

KAUST Beacon Development (KBD) through Aquageo International Consultancy LLC has requested GeoBM Sagl to undertake 3D groundwater numerical modelling for the assessment of groundwater level and quality impact at parts of The Line and The Spine development, at NEOM, on the Red Sea Coast of Saudi Arabia, for the Lots 5 to 7.

The scope of the assessment is to prepare a groundwater model for the Phase 2 project area of the Line, in order to be able to understand the magnitude of dewatering impacts on the local environment.

CLIENT

KAUST Beacon Development (KBD) and AQUAGEO INTERNATIONAL CONSULTANCY LLC, 2023.

WHAT WE DID

A 3D flow and mass-transport model is developed. The natural situation at the coastline is set up, with variable fluid density processes, to simulate saltwater intrusion (Density-Dependent Flow) influenced by the dewatering works at LOTS 5 to 7.

Brunei Beach Wells Systems (BRUNEI), 2023

BRUNEI BEACH WELL SYSTEMS

PURPOSES

Beach wells are usually located on the seashore in close vicinity to the ocean. These intake facilities are relatively simple to build and the seawater they collect is pretreated via slow filtration through the subsurface sand/seabed formations in the area of source water extraction. Within this context, the project aimed to:

To simulate two (2) beach well layouts.
Determine which simulated layout would be able to provide mostly 350 m³/hr with an acceptable drawdown of maximum – 4 meters.

CLIENT

AQUAGEO INTERNATIONAL CONSULTANCY LLC, 2023.

WHAT WE DID

We enabled realistic and dependable assessment of pumping beach wells layouts to model and cross-compared two scenarios using a working 3D hydrogeological numerical model approach.

Stazione di pompaggio-ARM (TI), 2023

Dewatering of “Stazione di pompaggio-ARM” (TI, CH)

PURPOSES

Estimation of dewatering rates of the construction site that requires dry conditions.

CLIENT

GEOLOG.CH, 2023.

WHAT WE DID

We enabled realistic and dependable assessment of dewatering needs (pumping rates volumes) to model and cross-compared various scenarios using a working 3D hydrogeological numerical model approach.

PAC Cadempino, (TI, CH), 2023

Open loop geothermal system, Cadempino, TI

PURPOSES

To implement a 3D numerical hydro-geothermal model for the study of the evolution of temperature in the aquifer and potential thermal perturbation. Dual use; warming and cooling with applied dT = 4°C.

CLIENT

Private, 2023.

WHAT WE DID

We elaborated a 3D Numerical modeling to identify the potential temperature anomalies and interferences; the thermal affected zone (TAZ).

PAC Parrocchia di Giubiasco (TI, CH), 2022

Open loop geothermal system, Giubiasco, TI

PURPOSES

To design and implement a geothermal open-loop systems. Groundwater heat pump (GWHP) systems have gained attention for space heating and cooling due to its efficiency and low installation costs. Such application as ground source heat pump (GSHP) system can be classified into closed- and open-loop.

CLIENT

Parrocchia di Giubiasco, 2022.

WHAT WE DID

Service provided included: analyses, assessment, drilling, pumping and recharge testing and numerical simulation.

We proceeded with the initial assessment to evaluate the flow capacity of the aquifer to provide the requested rates, the thermal effects around the injection wells, and we elaborated a 3D Numerical modeling to identify the potential temperature anomalies and interferences; the thermal affected zone (TAZ).

The Island (UAE), Besix, 2020

Dewatering of the Island construction site (UAE)

PURPOSES

The internal dewatering of the Island construction site, required to enable a dry excavation, has encountered issues related to the amount of water to dewater, which continued for longer than anticipated, and at higher rates.

In August 2020 a first review demonstrated that various factors have led to very significant increase in dewatering volume during execution of the works compared to those that were expected and had been budgeted for at the time of the tender.

CLIENT

Besix Construction, 2020.