I. Industry Development

1. Aimoli is one of the earliest domestic companies to focus on the R&D and industrialization of technologies for monitoring groundwater flow velocity and direction. With more than a decade of dedicated expertise in the field of groundwater monitoring, it has helped reduce the industry’s reliance on imported equipment.

2. Leveraging proprietary core algorithms +360° Panoramic optical integration, AML920 In extremely turbid water bodies, 1000  Key performance indicators, such as ultra-deep well logging and single-well 3D vector measurement, have reached the advanced level of comparable international equipment. (Data available upon request.)

3. It has currently been adopted by universities, research institutes, and organizations in the fields of hydrology, geological environment, railways, and geology and mineral resources, and is highly favored by environmental enforcement and monitoring agencies across China. It also supports major projects in numerous regions worldwide.

II. Composition of the Integrated Device

AML920 The groundwater flow velocity and direction meter consists of four main components: a velocity and direction sensing unit, a system control unit, a cable and transmission unit, and an auxiliary control unit.

1. Flow Velocity and Direction Detection Unit

This unit comprises a high-definition microscopy module, an electronic compass, a water level and water temperature measurement module, a video surveillance module, and an auxiliary measurement module.

· High-Definition Microscopy Module: Used to measure the flow velocity of groundwater;

· Electronic compass: Used to determine the direction of groundwater flow;

· Water Level and Water Temperature Measurement Module: Real-time monitoring of groundwater physical parameters ( Water level, water temperature ) It can both precisely determine the descent depth of the probe and be used to correct the kinematic viscosity of groundwater, thereby improving measurement accuracy under high-flow conditions. ( Temperature variations can affect fluid resistance. )；

· Video Surveillance Module: Supports top-down view and 360° Panoramic view enables real-time monitoring of downhole conditions, such as screen openings.

· Auxiliary Measurement Module: Built-in LED Light source, used to illuminate the underground environment and enhance observation clarity.

2. System Control Unit

The system control unit primarily comprises a data storage unit, a signal acquisition unit, a data processing unit, a data display unit, a data output unit, and other auxiliary units. Its main functions include:

1 ) Store on-site operating condition videos;

2 ) Acquire and process sensor signals such as flow velocity and flow direction;

3 ) Dynamically displays line charts, directional rose diagrams, and real-time imaging from underground wells;

4 ) Supports printing of measurement results.

3. Cables and Transmission Units

This unit integrates composite waterproof cables, a reel, and other components, featuring water resistance, abrasion resistance, and a laser‑etched depth scale. It supports signal transmission and device power supply over distances of up to one kilometer.

4. Auxiliary Control Unit

The auxiliary control unit primarily comprises a handheld operator and a software platform, enabling remote operation and data visualization. It supports human–machine separation, thereby meeting the operational requirements of unattended on-site operation.

Three . Project Application ( AML920 The measurement performance of subsurface flow velocity and direction instruments is influenced by well conditions, the aquatic environment, and the configuration of well screen openings. Therefore, equipment suitability should be assessed in conjunction with on-site operating conditions; data reports are available upon request.

1. Water Inrush Safety Assurance Project at a Coal Mine in Shanxi Province

Client Project:

During coal mining operations, water-inrush incidents may occur. To prevent collapses and ensure mine safety, it is necessary to monitor the velocity and direction of underground water flow.

AML920 Groundwater Flow Velocity and Direction Instrument Assistance Project:

AML920 Particle tracking measurement technology assesses the flow velocity and direction of water in boreholes, evaluates the safety of mine tunnels and their ability to support continued project operations, identifies leakage points, and ensures safety.

2. A certain deep-earth resource development project

Client Project:

Shallow resources have been depleted, prompting the exploration of new deep‑earth resources. When developing deep‑seated resources requires penetrating multiple aquitards, the complexity of the groundwater environment and the thermal properties of the fluids necessitate monitoring the flow velocity, flow direction, and temperature of surrounding aquifers. By employing refrigeration technology to freeze the groundwater into a solid barrier, a stable access path can be established for drilling operations.

AML920 Groundwater flow velocity and direction meter:

Support 500 Ultra-deep monitoring at depths exceeding meters ( Withstand voltage can be customized. ) , the built-in geomagnetic electronic compass and software‑based trajectory‑tracking algorithm reveal the cross‑contamination pathways between deep confined groundwater and shallow phreatic water, making changes in flow velocity and direction immediately apparent.

Helping Project:

Conserve energy by precisely identifying optimal energy‑consumption points, leveraging data analytics to determine water‑flow directions and energy requirements, and optimizing the selection of freezing zones. This serves as a supporting metric while also providing robust support for the project.

3. A certain subway project in Guangdong Province

Client Project:

Construct a subway along the Daya Bay coastal zone. Due to the region’s topography—mountains on one side and seawater on the other—the subsurface groundwater flow is highly complex, necessitating monitoring of both the erosive forces of stormwater runoff and the pressure of seawater intrusion to inform the structural design of tunnel support systems.

AML920 Groundwater Flow Velocity and Direction Instrument Assistance Project:

IP68 Protection rating, 316  A series of stainless steel probes, corrosion-resistant and capable of continuous operation in harsh environments, enable real-time monitoring of the impact of construction activities on subsurface groundwater flow fields, via the BeiDou system. + 4G Upload data in dual-mode to stay informed of project progress in real time.

Monitoring the velocity and direction of groundwater allows for a more precise analysis of flow patterns and magnitudes, guiding support‑structure design, ensuring site safety, and facilitating the smooth progress of the project.

4. A mine water-inrush accident project

Client Project:

During mining operations, a water-inrush incident occurred, necessitating the identification of the leak source and its sealing, as well as the pumping out of accumulated water from the mine pit to resume production.

AML920 Groundwater Flow Velocity and Direction Instrument Assistance Project:

High-precision sensing technology delivers exceptional accuracy in flow‑rate measurement, with azimuthal error tightly constrained to a very small range, enabling highly accurate detection of subtle hydrological variations.

Monitor the velocity and direction of groundwater flow through observation wells. ( Well )  Data-based identification of seepage points ( Leakage point )  And implement sealing measures to ensure the safe continuation of mining operations at the site.

5. Pollution Source-Tracing Project in a Chemical Industrial Park in Henan Province

Client Project:

A pollution incident occurred in the chemical industrial park, prompting an investigation to identify the source of contamination; each enterprise is… “ Prove one's innocence ” , it is necessary to accurately identify the source of pollution.

AML920 Groundwater Flow Velocity and Direction Instrument Assistance Project:

AML920 The groundwater flow velocity and direction meter employs particle image velocimetry to reliably acquire clear velocity and direction data, and it is equipped with a dedicated cleaning film to prevent cross-contamination between different underground water bodies.

It is also equipped with analytical software that can process monitoring data in real time and track the dispersion pathways of pollutants. By tracing the flow of groundwater contaminants, it is possible to pinpoint the pollution source with considerable accuracy, thereby helping to determine the liability of the responsible enterprise.

6. A water‑theft traceability project in Jiangsu Province

Client Project:

The promulgation of the Regulations on Groundwater Management, driven by water‑conservation imperatives, has led the state to tighten oversight of groundwater resources. A certain enterprise drilled wells and then sealed them, engaging in unauthorized water extraction. To facilitate the investigation, it is necessary to identify the enterprise’s illicit water‑withdrawal points.

AML920 Groundwater Flow Velocity and Direction Instrument Assistance Project:

By analyzing the funnel-shaped water-level decline caused by unauthorized water extraction, we monitor subsurface flow velocity and direction, and, by cross-referencing multi-point velocity and flow‑direction data, pinpoint concealed illegal wells.

7. A seawater intrusion detection project in Guangdong Province ( Online devices )

Client Project:

It is necessary to analyze the tidal patterns of seawater, distinguish between the oscillatory motion of shallow coastal waters and the exchange dynamics of deep groundwater, and investigate the impact forces exerted by rising and falling tides on the coastal zone.

AML920 Groundwater Flow Velocity and Direction Instrument Assistance Project:

AML920 Three-dimensional vector data of groundwater can be obtained from a single well, enabling continuous, real-time, automated online measurements that generate thousands of data points per minute, thereby ensuring customers have sufficient statistical data to build dynamic monitoring models.

8. Seepage Detection Project for a Dam at a Reservoir in the Western Region

With global warming and rising temperatures, high-altitude glaciers and snow are melting. The resulting meltwater must be stored in reservoirs, necessitating the construction of dams.

Client Project:

Reservoir dams require real-time monitoring of flow velocity and direction within the dam structure, tracking changes in seepage volume, issuing early warnings of potential dam‑break risks, and ensuring the safety of residents living near the reservoir and downstream.

AML920 Groundwater Flow Velocity and Direction Instrument Assistance Project:

Groundwater flow velocity and direction around the dam are measured using peripheral monitoring wells. Based on the acquired velocity and direction data, permeability parameters are determined to assess the stability of the dam structure.

9. A mine curtain grouting monitoring project

Client Project:

For the project’s mining operations, water must be pumped from the mine shaft, with a head difference of… 200~600 Between the piles, groundwater flow must be monitored to prevent seepage through the cutoff curtain or its collapse.

AML920 Groundwater Flow Velocity and Direction Instrument Assistance Project:

Accurately monitors flow velocity and direction with minimal data error, and is compatible with a variety of complex water environments, including clear and turbid waters, thereby meeting the error‑control requirements of engineering monitoring.

10. A chemical industrial park in Shandong Province

Client Project:

During the pollution remediation process, it is essential to delineate the extent of pollution sources and conduct precise source tracing in order to develop an effective remediation plan.

AML920 Groundwater Flow Velocity and Direction Instrument Assistance Project:

AML920 Not only does it enable clear observations, but it is also equipped with analytical software that can process monitoring data in real time, track the dispersion pathways of pollutants, and ensure data traceability—providing a scientific basis for pollution‑control decision‑making.

  Based on monitoring data of groundwater flow velocity and direction, the extent of the contamination plume is narrowed, providing a scientific basis for source‑tracing remediation, reducing ineffective expenditures, and conserving energy.

Four . Applicable Scenarios  

Five . Technical Specifications  

· Standard configuration 6 Parameters: Flow velocity, flow direction, water temperature, water level, overhead view, and 360° Wellbore circumferential inspection

· Scalable parameters: pH Conductivity, dissolved oxygen, turbidity, redox potential, qualitative analysis of characteristic pollutants, identification of emerging contaminants, groundwater nitrate–nitrite–ammonium (TN) levels, organic compounds, heavy metals, and more; custom configurations available for specific requirements.