{"id":657,"date":"2026-10-15T08:38:21","date_gmt":"2026-10-15T00:38:21","guid":{"rendered":"https:\/\/www.aimoli2016.cn\/?p=657"},"modified":"2026-10-15T08:38:22","modified_gmt":"2026-10-15T00:38:22","slug":"how-aimoli-aml920-solved-groundwater-flow-measurement-challenges-in-a-guangzhou-metro-project","status":"publish","type":"post","link":"http:\/\/www.aimoli2016.cn\/?p=657","title":{"rendered":"How AIMOLI AML920 Solved Groundwater Flow Measurement Challenges in a Guangzhou Metro Project"},"content":{"rendered":"\n

Description:<\/strong><\/p>\n\n\n\n

Discover how AIMOLI AML920 solves groundwater flow measurement challenges in a Guangzhou metro project, including turbid-water testing and multi-depth groundwater flow analysis.<\/p>\n\n\n\n

Guangzhou Metro Survey Case Study: Application of the AIMOLI AML920 Groundwater Flow Velocity and Direction Meter<\/h2>\n\n\n\n

1. Project Background: Why Measure Groundwater Flow Velocity and Direction During Metro Surveys?<\/h2>\n\n\n\n

A metro project in Guangzhou, China, was conducting preliminary surveys for a new metro line. For metro engineering projects, understanding groundwater levels and geological structures is an essential part of site investigation. However, to further assess the potential impact of groundwater on tunnel excavation and subsequent construction, it is also necessary to determine the actual groundwater flow velocity and direction at different depths within aquifers.<\/p>\n\n\n\n

Conventional investigation methods can provide basic geological and groundwater data. However, targeted field testing is still needed to identify the actual flow directions, velocities, and variations in groundwater flow conditions across different geological layers.<\/p>\n\n\n\n

Traditional methods, such as the three-hole method and tracer tests, typically require multiple boreholes or additional field testing procedures. These approaches can involve considerable time and cost. Meanwhile, relying solely on theoretical calculations may not fully reflect the actual groundwater flow conditions at different depths.<\/p>\n\n\n\n

Therefore, the project’s design team needed in-situ groundwater flow velocity and direction measurements to support regional hydrogeological analysis, metro route planning, and the evaluation of subsequent construction methods.<\/p>\n\n\n\n

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2. The Solution: Using the AIMOLI AML920 Groundwater Flow Velocity and Direction Meter<\/h2>\n\n\n\n

To address the project’s groundwater flow measurement requirements, the project manager selected the AIMOLI AML920 Groundwater Flow Velocity and Direction Meter<\/a> for on-site testing.<\/p>\n\n\n\n

2.1 Single-Borehole Testing to Reduce Additional Drilling Requirements<\/h3>\n\n\n\n

The AML920 supports single-borehole testing. When site conditions and instrument operating requirements are met, technicians can use existing geological survey boreholes to conduct measurements without necessarily drilling multiple additional boreholes solely to obtain groundwater flow velocity and direction data.<\/p>\n\n\n\n

For metro survey projects where boreholes have already been established, this approach helps maximize the use of existing investigation infrastructure while reducing the additional costs and time associated with drilling and field operations.<\/p>\n\n\n\n

2.2 Supporting Groundwater Measurements in Turbid Conditions<\/h3>\n\n\n\n

Some groundwater environments in Guangzhou have high turbidity and sediment content, creating additional challenges for groundwater flow velocity and direction measurements.<\/p>\n\n\n\n

For instruments that rely on observing particle movement in water, difficulties in identifying particles may affect data acquisition and potentially lead to abnormal measurement results. Therefore, the ability to accommodate different water conditions is an important consideration when selecting equipment for field investigations.<\/p>\n\n\n\n

The AIMOLI AML920 supports three water conditions: clear water, turbid water, and intermediate water conditions. Combined with particle tracing and 360\u00b0 panoramic imaging, these capabilities provide technical support for groundwater flow observation under different water conditions.<\/p>\n\n\n\n

3. Instrument Application: How Does the AML920 Measure Groundwater Flow at Different Depths?<\/h2>\n\n\n\n

3.1 Particle Tracing and 360\u00b0 Panoramic Imaging to Observe Water Movement<\/h3>\n\n\n\n

The AML920 uses particle-tracing technology to observe the movement of particles in water and combines it with 360\u00b0 panoramic imaging to capture underground observation data.<\/p>\n\n\n\n

Under suitable water conditions, the instrument can be used to observe groundwater particle trajectories. Combined with its built-in electronic compass and measurement results, it can obtain vector data representing groundwater flow velocity and direction at the target location.<\/p>\n\n\n\n

By providing information about both flow speed and direction, the instrument helps technicians analyze groundwater movement and obtain more direct field data for subsequent hydrogeological investigations.<\/p>\n\n\n\n

3.2 Multi-Depth Measurements to Identify Differences Between Aquifers<\/h3>\n\n\n\n

Groundwater flow velocity and direction may vary significantly at different depths. Differences in geological structures, hydraulic conditions, and aquifer characteristics can result in different flow patterns in shallow and deep groundwater within the same site.<\/p>\n\n\n\n

If measurements are taken at only one depth, variations in other aquifers may be overlooked, potentially affecting the interpretation of the overall groundwater flow field.<\/p>\n\n\n\n

The AML920<\/a> can perform measurements at target depths and collect multiple sets of data to help technicians analyze groundwater flow velocity and direction at different levels. The ground-based terminal displays measurement images and relevant data in real time, allowing field personnel to monitor the testing process and results.<\/p>\n\n\n\n

By comparing measurements from different depths, technicians can further identify vertical variations in groundwater flow, providing more targeted field data for hydrogeological analysis.<\/p>\n\n\n\n

3.3 Obtaining In-Situ Measurement Data to Support Engineering Analysis<\/h3>\n\n\n\n

After field testing, technicians can organize the groundwater flow velocity and direction data and related test results into measurement records for project analysis.<\/p>\n\n\n\n

Compared with relying exclusively on theoretical calculations, in-situ groundwater flow measurements provide additional information about actual groundwater movement at the site. This gives the design team a more direct data basis for analyzing flow characteristics in different aquifers.<\/p>\n\n\n\n

It is important to note that groundwater flow velocity and direction represent only part of a comprehensive hydrogeological assessment. Engineering decisions must also consider geological structures, groundwater levels, water pressure, permeability, and other site investigation findings.<\/p>\n\n\n\n

\"AIMOLI<\/figure>\n\n\n\n

4. Project Value: Supporting Metro Route Planning and Construction Method Evaluation<\/h2>\n\n\n\n

For metro engineering projects, groundwater conditions may affect tunnel excavation, construction dewatering, and other underground construction activities. Understanding groundwater flow characteristics in advance helps investigation and design teams identify potential hydrogeological risks more comprehensively.<\/p>\n\n\n\n

In this project, the AIMOLI AML920 Groundwater Flow Velocity and Direction Meter offers three main areas of value.<\/p>\n\n\n\n

First, it supplements groundwater flow field data with in-situ measurements.<\/strong><\/p>\n\n\n\n

Measurements of groundwater flow velocity and direction at different depths provide field evidence for analyzing groundwater movement, supplementing conventional survey data that may not fully describe actual flow conditions.<\/p>\n\n\n\n

Second, it helps identify potential hydrogeological risks.<\/strong><\/p>\n\n\n\n

By combining measured groundwater flow data with other site investigation results, the design team can further assess how groundwater conditions may affect tunnel excavation and related construction activities. This helps identify areas and geological layers that require particular attention.<\/p>\n\n\n\n

Third, it provides reference data for evaluating subsequent engineering options.<\/strong><\/p>\n\n\n\n

Groundwater flow data can support metro route evaluation, construction method selection, and the assessment of dewatering, shield tunneling, or ground-freezing methods. Any decision to modify the route or optimize construction plans must still be based on comprehensive site investigation results and specialized engineering analysis.<\/p>\n\n\n\n

By supplementing conventional survey information with in-situ groundwater flow measurements before construction begins, the project team can develop a more comprehensive understanding of site hydrogeological conditions. This supports subsequent design and construction decisions while helping reduce uncertainties arising from insufficient understanding of groundwater conditions.<\/p>\n\n\n\n

5. Case Study Summary: Why Choose the AIMOLI AML920 Groundwater Flow Velocity and Direction Meter?<\/h2>\n\n\n\n

The key challenge in this Guangzhou metro preliminary survey project was to obtain actual groundwater flow velocity and direction data at different aquifer depths while addressing the measurement difficulties associated with turbid groundwater.<\/p>\n\n\n\n

The AIMOLI AML920 Groundwater Flow Velocity and Direction Meter combines single-borehole testing, support for different water conditions, particle tracing, 360\u00b0 panoramic imaging, and a built-in electronic compass. These features provide a practical technical approach for in-situ groundwater flow investigations.<\/p>\n\n\n\n

For metro, tunnel, and other underground engineering survey projects, in-situ groundwater flow data can help improve hydrogeological documentation and support engineering design, construction method evaluation, and potential risk analysis.<\/p>\n\n\n\n

6. Frequently Asked Questions (FAQ)<\/h2>\n\n\n\n

1. What Is a Groundwater Flow Velocity and Direction Meter Used For?<\/h3>\n\n\n\n

A groundwater flow velocity and direction meter is used to measure the speed and direction of groundwater movement at specific locations or depths. The resulting data can support hydrogeological investigations, metro and tunnel engineering surveys, groundwater flow field analysis, and related engineering research.<\/p>\n\n\n\n

2. Can the AIMOLI AML920 Groundwater Flow Velocity and Direction Meter Be Used in Turbid Water?<\/h3>\n\n\n\n

The AML920 supports clear water, turbid water, and intermediate water conditions. It also combines particle tracing with 360\u00b0 panoramic imaging for observation.<\/p>\n\n\n\n

Actual measurement performance depends on site water conditions, particle characteristics, and operating conditions. The appropriate operating mode should therefore be confirmed based on the specific project requirements.<\/p>\n\n\n\n

3. Does Groundwater Flow Measurement with the AML920 Require Multiple Boreholes?<\/h3>\n\n\n\n

The AML920 supports single-borehole testing. When site conditions and instrument operating requirements are met, existing geological survey boreholes can be used to reduce the need for additional drilling.<\/p>\n\n\n\n

Whether an existing borehole is suitable depends on factors such as borehole diameter, depth, internal conditions, and the planned testing procedure.<\/p>\n\n\n\n

4. Why Is It Necessary to Measure Groundwater Flow Velocity and Direction at Different Depths?<\/h3>\n\n\n\n

Aquifers at different depths within the same site may have different hydraulic conditions. As a result, groundwater flow velocity and direction may vary between layers.<\/p>\n\n\n\n

Measurements at multiple depths help identify these differences and reduce the risk of interpreting the entire groundwater flow field based on data from a single depth.<\/p>\n\n\n\n

5. Can Groundwater Flow Measurement Results Be Used Directly to Determine a Metro Route?<\/h3>\n\n\n\n

Groundwater flow measurement results can support route planning and engineering evaluation, but they should not be used as the sole basis for route selection.<\/p>\n\n\n\n

The design team must also consider geological conditions, groundwater levels, permeability, and other site investigation data to comprehensively evaluate project feasibility and construction risks.<\/p>\n\n\n\n

6. What Factors Should Be Considered When Selecting a Groundwater Flow Velocity and Direction Meter?<\/h3>\n\n\n\n

When selecting equipment, consider the following factors:<\/p>\n\n\n\n

    \n
  • Measurement requirements:<\/strong> Whether both groundwater flow velocity and direction must be measured, including at different depths.<\/li>\n\n\n\n
  • Water conditions:<\/strong> Whether the instrument is suitable for the site’s clear, turbid, or other relevant water conditions.<\/li>\n\n\n\n
  • Field operating conditions:<\/strong> Whether existing boreholes meet the requirements for instrument installation, deployment, and measurement.<\/li>\n\n\n\n
  • Data output capabilities:<\/strong> Whether the instrument can provide measurement data and deliverables suitable for project analysis.<\/li>\n\n\n\n
  • Engineering suitability:<\/strong> Whether the instrument’s capabilities match the project’s survey objectives, site conditions, and applicable technical specifications.<\/li>\n<\/ul>\n\n\n\n

    Selecting equipment based on actual testing requirements helps maximize the value of groundwater flow measurement in engineering investigations.<\/p>\n\n\n\n

    7. Facing Similar Groundwater Measurement Challenges? Contact AIMOLI Engineers<\/h2>\n\n\n\n

    If your project also faces challenges such as difficulty accurately measuring groundwater flow velocity and direction, uncertainty about groundwater flow differences at different depths, or testing difficulties in turbid water, please contact the AIMOLI engineering team.<\/p>\n\n\n\n

    Tell us about your project, site water conditions, and specific measurement requirements. Our engineers will help assess a suitable measurement solution and provide relevant technical support to help you address your groundwater flow velocity and direction measurement challenges more effectively.<\/p>\n\n\n\n

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    <\/p>\n","protected":false},"excerpt":{"rendered":"

    Description: Discover how AIMOLI AML920 solves groundwater flow measurement challenges in a Guangzhou metro project, including turbid-water testing and multi-depth groundwater flow analysis. Guangzhou Metro Survey Case Study: Application of the AIMOLI AML920 Groundwater Flow Velocity and Direction Meter 1. Project Background: Why Measure Groundwater Flow Velocity and Direction During Metro Surveys? A metro project […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-657","post","type-post","status-publish","format-standard","hentry","category-blog"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t