Nguồn bài viết từ Hãng IN-SITU: https://in-situ.com/en/customer-stories/salinity-forecasting-informs-farming-practices-in-vietnams-mekong-delta
Overview
Water quality monitoring in the Mekong Delta enables tracking annual salinity fluctuations, providing a foundation for predictive models to assess and respond to sea-level rise, saltwater intrusion, and the impact of saline soils on agricultural activities.
Viet An proposes using AquaTROLL (IN-SITU) - an online multi-parameter monitoring device that plays a crucial role in data collection and analysis, effectively supporting research and environmental management in the region.
Challenges
The intricate network of rivers in the Mekong Delta, particularly in Tra Vinh province, contributes to a rich agricultural landscape. However, low-lying areas in Tra Vinh are vulnerable to flooding and sea-level rise, resulting in increased soil salinity.
Saline soils are detrimental to crop growth. If salinity levels continue to rise over an extended period, it can jeopardize the livelihoods of farmers in the region and negatively impact the nation's agricultural production.
Over time, equipment, pipelines, and infrastructure exposed to saltwater floods can rust or corrode, reducing lifespan and requiring costly repairs.
If saltwater contaminates freshwater sources, it can deplete the supply that local residents depend on for bathing, washing, and other household tasks. It also poses a risk of damaging personal belongings and other tools.
With sea-level changes increasing the frequency and severity of floods and saltwater intrusion, collecting data on these phenomena to develop models and warning systems is essential.
Solution
In 2023, a Customer contacted Viet An Enviro, Vietnam's leading environmental monitoring and industrial measurement equipment supplier, requesting a multi-parameter water quality monitoring system at several continuous monitoring stations throughout Tra Vinh, including salinity, dissolved oxygen, conductivity, level, and temperature.
With a team of highly experienced engineers in technology transfer, Viet An is committed to meeting the maximum needs of customers and supporting the efficient operation and management of equipment.
Viet An installed AquaTROLL 500 devices at 14 requested stations in December 2023. Aqua TROLL devices can be easily integrated with third-party telecommunication equipment to update real-time data to third-party data management systems.
After four months of operation and regular maintenance checks, we have found that the AquaTROLL 500 has many outstanding advantages over other devices," said Nam Tran, Commercial Director of Viet An
Additionally, the simple installation is a big plus. The device is deployed directly in the water, unlike installations in kiosks that require a sample tube to transport water to the measuring station. With the integrated communication device, each station becomes easier to operate. Although the stations are distributed throughout the Mekong Delta, deploying all 14 stations only took 3 days.
The modular sensor design makes removing, installing, and calibrating sensors easy. The AquaTROLL 500 design minimizes the calibration solution required for each maintenance period. Thanks to the interchangeable sensor design, technicians can install four conductivity sensors in one device and calibrate them together, saving calibration solutions.
The flat sensor face and automatic wiper cleaning feature help keep the sensor clean between measurements, minimizing fouling, even in sediment-rich coastal environments. After three months of operation, the sensor head was still clean and operating effectively.
Results
In the short term, data from the stations will be released to local authorities so they can inform the public in the area when freshwater sources may not be suitable for irrigation, livestock drinking water, and personal use.
In the long term, monitoring the fluctuations of parameters throughout the year will provide a basis for salinity forecasting models and digital maps, with the goal of accurate and reliable future predictions. Research institutes will also have access to the data for long-term climate research.
This project is just the beginning of data collection and forecasting in the region. Data from the stations will form the basis for increasingly accurate models, supporting proactive responses to mitigate the impacts of floods and saltwater intrusion on agriculture, aquaculture, and public health.
We hope to introduce this project as a case study for government organizations such as the Department of Natural Resources and Environment of other provinces, the Department of Fisheries, and the Institute of Oceanography, said Mr. Nam, hoping that the project's salinity forecasting models can support environmental and resource management efforts across Vietnam
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