Assessment of Combined Impact of Climate Change and Water Resources Development on Hydrological Cycle in the Nam Ngum River Basin

• KUDO Ryoji

  National Institute for Rural Engineering, NARO

• MASUMOTO Takao

  National Institute for Rural Engineering, NARO

• HORIKAWA Naoki

  National Institute for Rural Engineering, NARO

• YOSHIDA Takeo

  National Institute for Rural Engineering, NARO

Bibliographic Information

Other Title

• 気候変動と水資源開発がナムグム川流域の水循環に与える複合的影響の評価
• キコウ ヘンドウ ト ミズシゲン カイハツ ガ ナムグムガワ リュウイキ ノ ミズ ジュンカン ニ アタエル フクゴウテキ エイキョウ ノ ヒョウカ

Abstract

A series of hydropower projects have been planned in the Mekong River, and the influences of these developments of water resources and climate change on hydrological cycle are of particular interest to the Mekong riparian countries. In the Lao PDR, there are about 70 hydropower projects and several dams are under construction upstream of the Nam Ngum Dam (NN1). In this study, we explored the combined impacts of climate change and dam constructions on water management of the NN1 and available water resources in the Nam Ngum River. To assess dam operation and hydrological cycle, a distributed water circulation model and a reservoir operation model were applied to the basin. Furthermore, we used the future climate scenarios by the MRI-AGCM3.1S for the assessment of climate change impact. The results of the analysis show that inflows and reservoir storages of the NN1 during rainy seasons will decrease in drought years due to climate change and new dams in future. In addition, water releases for hydropower of the NN1 will increase owing to smoothing effects of flood discharges by the new dams. These results indicate that the consideration of combined impacts of climate change and water resources developments is of importance in projection of water resources in developing regions such as the Mekong River Basin.

Journal

• Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering

  Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 81 (1), 57-66, 2013

  The Japanese Society of Irrigation, Drainage and Rural Engineering

Keywords

• Climate change
• Water resources development
• Combined impact
• Distributed water circulation model
• Reservoir operation model
• Super-high resolution atmospheric general circulation model
• Mekong River

Details

• CRID: 1390282680266033920
• NII Article ID: 10031171474
• NII Book ID: AA12240517
• DOI: 10.11408/jsidre.81.57
• ISSN: 18847242
• ISSN: 18822789
• NDL BIB ID: 024317545
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024317545
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed