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Multiple drivers of hydrological alteration in the transboundary Srepok River Basin of the Lower Mekong Region.
Gunawardana, Shakthi K; Shrestha, Sangam; Mohanasundaram, S; Salin, Krishna R; Piman, Thanapon.
Afiliação
  • Gunawardana SK; Water Engineering and Management, School of Engineering and Technology, Asian Institute of Technology, P.O. Box 4 Klong Luang, Pathum Thani, 12120, Thailand.
  • Shrestha S; Water Engineering and Management, School of Engineering and Technology, Asian Institute of Technology, P.O. Box 4 Klong Luang, Pathum Thani, 12120, Thailand; Stockholm Environment Institute, Asia Centre, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand. Electronic address: sangam@ait.ac
  • Mohanasundaram S; Water Engineering and Management, School of Engineering and Technology, Asian Institute of Technology, P.O. Box 4 Klong Luang, Pathum Thani, 12120, Thailand.
  • Salin KR; Aquaculture and Aquatic Resources Management, School of Environment, Resources and Development, Asian Institute of Technology, P.O. Box 4 Klong Luang, Pathum Thani, 12120, Thailand.
  • Piman T; Stockholm Environment Institute, Asia Centre, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand.
J Environ Manage ; 278(Pt 1): 111524, 2021 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-33126187
ABSTRACT
Human-induced changes in land and water resources adversely affect global hydrological regimes. Hydrological alteration of the natural flow regime is considered to have a significant damaging and widespread impact on river ecosystems and livelihoods. Therefore, understanding the hydrological alteration of rivers and the potential driving factors affecting such alterations are crucial to effective water resources management. This study analyses the impact of changes in land use, climate, and hydropower development on the hydrological regime of the Srepok River Basin in the Lower Mekong Region. The Lower Mekong Basin (LMB) in Southeast Asia is known for its agriculture, forests, fisheries, wildlife, and diverse natural ecosystems. Historical land use and climate change are quantified (utilising European Space Agency land cover and observed meteorological data) and correlated with the hydrological indicators using the Indicators of Hydrologic Alteration (IHA) software. Moreover, pre and post impacts on the hydrological regime by hydropower development are quantified using the Range of Variability Approach (RAV) in IHA software. The results reveal that land use, rainfall, and temperature affect different aspects of the hydrological regime, with corroborating evidence to support variation among the most correlated IHA and environmental flow component (EFC) parameters with the three drivers. The highest and lowest correlations among the IHA and EFC parameters under each driver are against land use (0.85, -0.83), rainfall (0.78, -0.54), and minimum and max temperatures (0.42, -0.47). Among the parameters, the fall rate has the most significant effect on hydrological alteration of all drivers. Hydropower development in the basin mostly affects the fall rate and reversal. Identifying the connection between these multiple drivers and hydrological alteration could help decision-makers to design more efficient and sustainable water management policies.
Assuntos
Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Ecossistema / Rios Tipo de estudo: Estudo prognóstico País/Região como assunto: Ásia Idioma: Inglês Revista: J Environ Manage Ano de publicação: 2021 Tipo de documento: Artigo País de afiliação: Tailândia

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Ecossistema / Rios Tipo de estudo: Estudo prognóstico País/Região como assunto: Ásia Idioma: Inglês Revista: J Environ Manage Ano de publicação: 2021 Tipo de documento: Artigo País de afiliação: Tailândia