BANGKOK—China has notified downstream neighbors it is holding back the Mekong River flow at a hydropower dam on the waterway’s upper reaches for 20 days, as part of a new data-sharing pact, the Mekong River Commission (MRC) and Thailand said on Wednesday.
The statements came a day after a new U.S.-backed monitoring system said China had failed to notify downstream countries of water restrictions that started on Dec. 31.
