[admin]

Why Landfill Leachate Monitoring Requires Continuous Observation

Landfill leachate migration can occur below ground and may change with rainfall, landfill operations, liner condition, groundwater movement, and local geology. Periodic site inspection, sampling, and drilling remain important tools for environmental management, but they provide information only at specific locations and times.

A landfill monitoring program can therefore benefit from combining baseline investigation, geological and hydrogeological information, direct sampling, geophysical surveys, online data collection, field inspection, and professional interpretation. No single method independently confirms the source, extent, or environmental impact of a leachate release.

Geomative Co., Ltd., headquartered in Shenzhen, China, provides geophysical equipment and online monitoring solutions under its “Geophysics+” concept, combining field hardware, IoT communication, and cloud-based data services.

DIGspace Geo-3D Platform for Online Monitoring

According to Geomative’s latest product information, DIGspace Geo-3D Platform is the company’s current naming for its developing digital-platform offering. Geomative’s public online monitoring information describes a system that combines field monitoring equipment, cloud data transmission, IoT communication, and data-analysis functions.

The system can support:

• 24-hour online data collection and remote data access;

• real-time monitoring, inversion, modelling, and data display;

• configurable thresholds, alert levels, and notification methods;

• integration of manual inspection, periodic survey, and real-time monitoring data;

• multi-project and multi-user data collaboration.

The public product information lists landfill leakage monitoring, contaminated-site groundwater migration monitoring, tailings pond and dam safety monitoring, hydrogeological disaster monitoring, and slope-collapse monitoring among its application directions.

For landfill projects, continuous monitoring data can help establish a time series for observing changes in configured monitoring conditions. Alerts and anomalous trends should be reviewed with site inspection, environmental sampling, direct verification, and qualified engineering or environmental assessment before a leachate conclusion is made.

From Baseline Investigation to Long-Term Data Review

A practical landfill monitoring workflow generally has two complementary layers.

The first is baseline investigation. Historical records, landfill design information, monitoring wells, direct sampling, hydrogeological data, and suitable geophysical surveys can help establish an initial understanding of site conditions.

The second is long-term observation. After project-specific equipment deployment, online monitoring can collect and transmit configured data for remote review, trend comparison, and threshold-based alerts. This provides continuous supplementary information between periodic inspections; it does not replace inspection, maintenance, environmental compliance monitoring, or engineering judgement.

Electrical Resistivity Surveys for Subsurface Investigation

Electrical resistivity tomography (ERT) can provide continuous geophysical sections or three-dimensional datasets for investigating subsurface electrical contrasts. At landfill sites, these contrasts may relate to changes in moisture, material composition, groundwater conditions, waste distribution, geological structure, or other site-specific factors.

Such results are indirect geophysical evidence. They should be interpreted with boreholes, sampling results, monitoring-well data, landfill-construction records, hydrogeological information, and field observations.

GD-10 Single-Channel System

The GD-10 is a single-channel electrical resistivity system. Depending on the model and configuration, it supports 1D vertical electrical sounding and 2D ERT/IP profiling, with applicable configurations for 3D survey work.

It can provide electrical data for targeted landfill investigation, including areas where site conditions require additional review. Survey design should consider the target depth, electrode layout, access conditions, local interference, and the specific environmental question being assessed.

GD-20 Multichannel System

The GD-20 is a multichannel electrical resistivity system with an independent 5/12-channel design. In ERT work, it can acquire up to 10 channels of data simultaneously; in VES work, it can test up to 12 sets of sounding points at the same time.

Geomative states that, under comparable conditions, the GD-20’s average multichannel test efficiency can be 2–3 times that of single-channel equipment. It supports resistivity, induced polarization, and self-potential measurements, with 2D, 3D, and pseudo-3D survey options depending on configuration and survey layout.

The GD-20 product page lists landfill and seepage-area exploration among its application directions. For larger sites or projects requiring multiple survey lines, teams can assess whether a multichannel workflow is suitable for the investigation scope.

Related Pollution-Investigation Evidence

Geomative documents an oil-pollution investigation at a chemical-factory site using a Wenner-Schlumberger ERT survey. The case reported a pollution-distribution area of approximately 1,287 m², with anomaly depths averaging about 3–7m and reaching approximately 12m.

This case illustrates the use of ERT to investigate subsurface electrical anomalies in a specific oil-pollution setting. It does not directly validate landfill-leachate monitoring performance, because contaminant properties, landfill construction, hydrogeological conditions, and verification requirements differ between projects.

Company Background

Geomative reports that its products and solutions are deployed in more than 40 countries and regions, across over 100 industry applications, and serve more than 1,000 clients worldwide. Its public company profile also states that online monitoring systems have been deployed in landfill-leachate and dam-safety monitoring projects.

The company has National High-Tech Enterprise recognition and has been recognized in Shenzhen as a Specialized, Refined, Differentiated, and Innovative SME. It also lists ISO and CE-related certifications among its qualifications. These are company-level or product-compliance credentials, not a guarantee of monitoring results for a particular landfill site.

Conclusion

Landfill leachate monitoring is a continuing environmental-management process, not an automated confirmation of contamination. ERT can support baseline investigation and anomaly review, while connected online monitoring can provide continuous data collection, remote access, trend observation, and configured alerts.

Geomative’s GD-10 and GD-20 electrical resistivity systems, together with the DIGspace Geo-3D Platform, provide equipment and digital-platform options that landfill operators and environmental engineering teams can evaluate for connected monitoring workflows. Final interpretation, regulatory reporting, and remediation decisions should always be based on project-specific conditions and qualified environmental or engineering assessment.

https://www.geomative.com/
Geomative Co., Ltd.

[Author]

Posts