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Weekly Wet Season Situation Report in the Lower Mekong River Basin - 15 - 20 June 2022

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Mekong River Commission
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Key Messages

Key messages for this weekly report are presented below.

Rainfall and its forecast

  • Rainfall focused in the areas from Chiang Saen in Thailand to Tan Chau and Chau Doc in Viet Nam, including the middle and lower parts in Lao PDR and Cambodia, varying from 1.00 millimetres (mm) to 151.40 mm.

  • There will be average rainfalls for the next 5 days over the Mekong region from 21 to 27 June 2022 because there will be a low pressure dominating the Mekong region.
    Water level and its forecast

  • According to MRC’s observed water level at Jinghong, there was a number of fluctuating water levels between 536.59 m and 536.63 m from 15 to 20 June 2022. The current level is staying about 0.22 m higher than its Long-Term-Average (2015-2021) value. The outflow at Jinghong station fluctuated between 1,750.00 m3 /s and 1,790.00 m3 /s from 15 to 20 June 2022.

  • Water levels of monitoring station at Chiang Saen in Thailand increased about 0.09 m from 15 to 20 June 2022, but still stayed about 0.25 m higher than its LTA level, which is considered normal.

  • Water level (WL) from Chiang Khan in Thailand from 15 to 20 June 2022 decreased by about 0.55 m (about 1.01 m higher than its LTA value), while water level at Vientiane decreased about 0.58 m and still stayed about 1.34 m higher than its LTA level, which considered normal. Water levels at Nong Khai decreased 0.49 m and at Paksane decreased about 0.09 m, staying about 0.55 m and 0.07 m higher than their LTA value, respectively.

  • Water levels from Nakhon Phanom in Thailand and Pakse in Lao PDR increased between 0.15 m and 0.30 m. The current WLs at these stations were staying lower than their LTA value, considered abnormal. From the stretches of the river from Stung Treng to Kratie significantly decreased about 0.20 m and 0.90 m, staying 0.10 m and 0.34 m lower than their LTA level, respectively, considered an abnormal condition.

  • Water levels from Kompong Cham down to Chaktomuk, Koh Khel and Phnom Penh Port to Prek Kdam in Cambodia decreased about 0.02 m and 0.25 m, staying between 0.10m and 0.50 m lower than their LTA level.

  • The current water levels from Chiang Khan in Thailand to Paksane in Lao PDR are higher than their LTA value. Most of the stations have WL lower than their LTA value. WL at the 2 tidal stations at Tan Chau and Chau Doc are below their LTA value due to tidal effect during this monitoring period.

  • Over the next five days, the water levels across most monitoring stations are expected to go down and stay lower than their long-term average value in most stations.

Drought condition and its forecast

  • During June 12-18, the LMB was facing some moderate and severe meteorological droughts scattering over small areas across the region from the north to the south. Specifically, they took placed in Chiang Rai, Bokeo, Xayaburi, Oudomxay, Luang Prabang, Vientiane, Nong Khai, Si Saket, Surin, Ubon Ratchathani, Saravane, Chanthaburi, Pailin, Battambang, Banteay Meanchey, Siem Reap, Preah Vihea, Kampong Thom, Ratanak Kiri, Mondul Kiri, Kon Tum, and Gia Lai. However, it was just a short-term meteorological drought which would not be a big threat to agriculture.

  • For the upcoming three months’ forecasts, the LMB is likely to receive below-average rainfall in July and August with equivalent from moderate to severe meteorological droughts. Below-average rainfall is also forecasted for the lower part of the region covering Cambodia and Viet Nam during this coming September with moderate drought. While in October and November the LMB is likely to receive more than average rainfall, meaning no drought threat is predicted for the LMB.