skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices

River Discharge and Water Level Changes in the Mekong River: Droughts in an Era of Mega‐Dams

Lu, Xi Xi ; Chua, Samuel De Xun

Hydrological processes, 2021-07, Vol.35 (7), p.n/a [Periódico revisado por pares]

Hoboken, USA: John Wiley & Sons, Inc

Texto completo disponível

Citações Citado por
  • Título:
    River Discharge and Water Level Changes in the Mekong River: Droughts in an Era of Mega‐Dams
  • Autor: Lu, Xi Xi ; Chua, Samuel De Xun
  • Assuntos: channel changes ; China ; Dam construction ; Dams ; Downstream ; Drought ; Dry season ; Hydrology ; Moisture content ; Monsoon precipitation ; Rainy season ; River discharge ; River flow ; Rivers ; Seasons ; Stream discharge ; Stream flow ; the Mekong River ; Water content ; Water discharge ; Water level fluctuations ; Water levels ; Wet season
  • É parte de: Hydrological processes, 2021-07, Vol.35 (7), p.n/a
  • Descrição: While 1992 marked the first major dam – Manwan – on the main stem of the Mekong River, the post‐2010 era has seen the construction and operationalisation of mega dams such as Xiaowan (started operations in 2010) and Nuozhadu (started operations in 2014) that were much larger than any dams built before. The scale of these projects implies that their operations will likely have significant ecological and hydrological impacts from the Upper Mekong Basin to the Vietnamese Delta and beyond. Historical water level and water discharge data from 1960 to 2020 were analysed to examine the changes to streamflow conditions across three time periods: 1960–1991 (pre‐dam), 1992–2009 (growth) and 2010–2020 (mega‐dam). At Chiang Saen, the nearest station to the China border, monthly water discharge in the mega‐dam period has increased by up to 98% during the dry season and decreased up as much as −35% during the wet season when compared to pre‐dam records. Similarly, monthly water levels also rose by up to +1.16 m during the dry season and dropped by up to −1.55 m during the wet season. This pattern of hydrological alterations is observed further downstream to at least Stung Treng (Cambodia) in our study, showing that Mekong streamflow characteristics have shifted substantially in the post‐2010 era. In light of such changes, the 2019–2020 drought – the most severe one in the recent history in the Lower Mekong Basin – was a consequent of constructed dams reducing the amount of water during the wet season. This reduction of water was exacerbated by the decreased monsoon precipitation in 2019. Concurrently, the untimely operationalisation of the newly opened Xayaburi dam in Laos coincided with the peak of the 2019–2020 drought and could have aggravated the dry conditions downstream. Thus, the mega‐dam era (post‐2010) may signal the start of a new normal of wet‐season droughts.
  • Editor: Hoboken, USA: John Wiley & Sons, Inc
  • Idioma: Inglês
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.