Situation Report on Dry Season Hydrological Conditions in the Lower Mekong River Basin: November 2020–May 2021
This Situation Report presents a preliminary analysis of the Lower Mekong River Basin hydro-meteorological conditions over the 2020–2021 dry season. It shows fluctuations in water levels in the upper reaches of the Mekong mainstream in Lao PDR and Thailand, as well as low water volume stored in the Tonle Sap Lake. Rainfall in April–May was the highest on record for these months for the last 18 years in places. Overall, flows in the Mekong in the first five months of 2021 were also higher than the long-term average, except for December 2020 where flows in the Mekong mainstream were closer to normal. But river flows did not increase significantly.
The Technical Guidelines facilitates the implementation of the Procedures for Water Quality (PWQ) – one of the five Mekong Agreement’s Procedural Rules. The objective of the PWQ is to “establish a cooperative framework for the maintenance of acceptable/good water quality to promote the sustainable development of the Mekong River Basin.”
The report presents a preliminary analysis of the hydro-meteorological conditions in the Lower Mekong River Basin (LMB) in July–December 2020. The report suggests that the LMB experience a second year of low flows at the beginning and a delayed onset of the wet season in 2020, with some parts experiencing low flows and appearing to be worse than that in 2019.
This factsheet provides brief information about the MRC’s Joint Environmental Monitoring Programme (JEM) Pilots Project current running at the first two Mekong mainstream dams in Lao PDR – the Xayaburi and Don Sahong dams. It covers key facts you need to know about JEM.
The report presents a preliminary analysis of the hydro-meteorological conditions in the Lower Mekong River Basin (LMB) in January-July 2020 and identifies multiple possible causes of the low flows and drought in 2020.
The report will replaces the Annual Mekong Flood Report to provide an annual summary on different hydrological subjects, ranging from flood, hydrology, and drought recognition to monitoring and early warning, remote sensing, modelling, and water management.
This report contains the assessment of the status and trends of water quality at 30 stations across the Lower Mekong Basin (LMB). In addition to the assessment of water quality at all 17 mainstream and 5 Bassac stations, this report also includes the results of water quality analyses at 8 selected tributary stations covering 7 tributaries of the Mekong River, namely the Mae Kok River, Nam Ou River, Houay Mak Hiao, Nam Mun River, Se San River, Sre Pok River, and Tonle Sap River.
An inception report on piloting a Joint Environmental Monitoring Programme on two Mekong Mainstream Dams ‘Don Sahong Hydropower Project and Xayaburi Hydropower Project’
The inception report explains how and why the piloting on the two Mekong mainstream dams (Xayaburi and Don Sahong) is being conducted. It details the types of monitoring to collect data around five disciplines: hydrology and hydraulics, sediment, water quality, aquatic ecology, and fish and fisheries.