Factors for monitoring and investigating saltwater intrusion in Vietnam

12:10, 10/07/2024

This content is stipulated in Circular 39/2016/TT-BTNMT issued by the Ministry of Natural Resources and Environment concerning technical regulations on monitoring and investigating saltwater intrusion in Vietnam, effective from February 10, 2017.

Factors for monitoring and investigating saltwater intrusion in Vietnam - Illustrative Image

Article 5 of Circular 39/2016/TT-BTNMT regulates the factors for monitoring and investigating saltwater intrusion in Vietnam, including:

Direct measurement factors

- Salinity;

- Depth.

Direct measurement or collection factors:

- Water level;

- Water temperature;

- Rainfall;

- Collection of information on weather, location, and characteristics of the surveyed river segment (riverbed erosion, discharge sources on both riverbanks), and historical salinity intrusion situations.

Additionally, Article 6 of Circular 39/2016/TT-BTNMT stipulates the measuring equipment, intrustments, and vehicles used for monitoring and investigating saltwater intrusion in Vietnam as follows:

Measuring equipment:

- Salinity meter: ensuring accuracy of 0.1 ‰;

- Depth meter: ensuring accuracy of 1 cm;

- GPS locator: ensuring accuracy ± 3 m horizontal.

Intrustments and vehicles:

- Specialized sample collection tool by layer;

- Depth measuring pole or rope with plummet (used in the absence of a depth meter);

- Kit and chemicals for determining salinity using Silver Nitrate AgNO3 method (used in the absence of a salinity meter);

- Boats, ships, and other floating means for serving the monitoring and surveying.

Detailed regulations may be found in Circular 39/2016/TT-BTNMT issued on December 19, 2016.

Le Vy

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