Attachments
Key Messages
Key messages for this weekly report are presented below.
Rainfall monitoring and forecast
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In the period of 02 – 08 July 2024, there has been light to heavy rainfall has been observed over the LMB. Especially, during this period, heavy to very heavy rainfall has been observed over the LMB in Chiang Sean, Nong Khai, Vientiane, Paksane, Muong Kao, Kratie, and Kampong Cham.
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During 09 – 13 July 2024, the accumulated rainfall over the entire Lower Mekong Basin is distributed with light to heavy rain. Moderate rainfall is expected to occur in most parts of Laos, south-western & north-eastern Cambodia, and the 3S basins. However, heavy rainfall may likely occur in some areas such as Paksane, Thakhek, Savannakhet, Khong Chiam, Pakse on 10 July and the 3S basins on during 09-13 July.
Water level monitoring and forecast
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At 22 key monitoring stations along the Mekong mainstream from 02 – 08 July 2024, water levels are normal, and the flow threshold (PMFM 6C) are under normal conditions. It is also the same condition for Tan Chau and Chau Doc monitoring stations, which are significantly influenced by sea tidal fluctuation.
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In the period of 09 – 13 July 2024, Water levels are forecasted to be slightly increasing at upper stretches of LMB from Chiang Saen to Nongkhai stations. However, water level from Paksane to Pakese will drop, while from Stung Treng to Prek kdam, they will rise. At Tan Chau and Chau Doc stations, the water levels are predicted to be also fluctuated, resulting from the influence of sea tidal patterns. Water levels at most of the stations are expected to be below their long-term averages (LTAs).
Drought condition and forecast
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During 2-8 July 2024, the LMB was generally normal in most parts of the region. Some moderate drought was taking place in Khammuan and Champasck of Laos, and Nong Khai, Sakon Nakhon, and Nakhon Phanom of Thailand. However, they were taking pace in just a small extent. No significant impact of drought was expected for the current work.
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From July to September 2024, it is expected to bring drought conditions to certain areas of the LMB. In July, eastern Cambodia, 3S area, and northern Lao PDR are the most severe areas. In August, severe and exceptional droughts are forecasted for the upper part of the LMB. Other areas are likely normal or wet. In September, moderate to severe drought is forecasted for the northern Cambodia and 3S area, while other areas are likely normal or wet.