Streamflow prediction in “geopolitically ungauged” basins using satellite observations and regionalization at subcontinental scale

Du, Tien L. T.; Lee, Hyongki; Bui, Duong Du; Arheimer, Berit; Li, Hongyi; Olsson, Jonas; Darby, Stephen E.; Sheffield, Justin; Kim, Dong Hwan; Hwang, Eui-Ho

doi:10.1016/j.jhydrol.2020.125016

Cited by 19 publications

(16 citation statements)

References 74 publications

(96 reference statements)

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“…GM-HYPE v1.3 was calibrated and validated across 13 main river basins in the GM region using data from 1991 to 2009 (Du et al, 2020) and the GM setup is based on the HYPE hydrological model structure (see Appendix 1 from Lindström et al, 2010). The performance of GM-HYPE v1.3 was statistically evaluated at 58 gauge stations with Nash-Sutcliffe Efficiency (NSE), Kling-Gupta Efficiency (KGE), and CC of 0.66, 0.76, and 0.85 (median values), respectively, during the model calibration period (2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009), with 68% of stations having NSE values equal or greater than 0.5) and 0.65, 0.72, and 0.86 (median values), respectively, during the validation period (1991-2001, with 73% of stations having NSE values equal or greater than 0.5; see Table S4 in Supporting Information S1).…”

Section: Multi-basin Hydrological Model Gm_hypementioning

confidence: 99%

“…Note. Detailed description of other data (e.g., temperature, topography) can be found in Du et al (2020).…”

Section: Study Area and Datamentioning

confidence: 99%

“…Reservoir inflows were obtained from our updated Greater Mekong-Hydrological Prediction for Environment multi-basin model (GM-HYPE v1.3) that has been calibrated and validated using unregulated historical streamflows across 13 main river basins (Du et al, 2020). A detailed description of the data input and model setup for GM-HYPE v1.3 can be found in Du et al (2020). GM-HYPE v1.4 (the version used in this study) is an updated model with the latest reservoir properties and precipitation data.…”

Section: Study Area and Datamentioning

confidence: 99%

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Streamflow Prediction in Highly Regulated, Transboundary Watersheds Using Multi‐Basin Modeling and Remote Sensing Imagery

Lee

Duong

et al. 2022

Water Resources Research

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Despite the potential of remote sensing for monitoring reservoir operation, few studies have investigated the extent to which reservoir releases can be inferred across different spatial and temporal scales. Through evaluating 21 reservoirs in the highly regulated Greater Mekong region, remote sensing imagery was found to be useful in estimating daily storage volumes for within‐year and over‐year reservoirs (correlation coefficients [CC] ≥ 0.9, normalized root mean squared error [NRMSE] ≤ 31%), but not for run‐of‐river reservoirs (CC < 0.4, 40% ≤ NRMSE ≤ 270%). Given a large gap in the number of reservoirs between global and local databases, the proposed framework can improve representation of existing reservoirs in the global reservoir database and thus human impacts in hydrological models. Adopting an Integrated Reservoir Operation Scheme within a multi‐basin model was found to overcome the limitations of remote sensing and improve streamflow prediction at ungauged cascade reservoir systems where previous modeling approaches were unsuccessful. As a result, daily regulated streamflow was predicted competently across all types of reservoirs (median values of CC = 0.65, NRMSE = 8%, and Kling‐Gupta efficiency [KGE] = 0.55) and downstream hydrological stations (median values of CC = 0.94, NRMSE = 8%, and KGE = 0.81). The findings are valuable for helping to understand the impacts of reservoirs and dams on streamflow and for developing more useful adaptation measures to extreme events in data sparse river basins.

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Section: Multi-basin Hydrological Model Gm_hypementioning

confidence: 99%

“…Note. Detailed description of other data (e.g., temperature, topography) can be found in Du et al (2020).…”

Section: Study Area and Datamentioning

confidence: 99%

Section: Study Area and Datamentioning

confidence: 99%

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Streamflow Prediction in Highly Regulated, Transboundary Watersheds Using Multi‐Basin Modeling and Remote Sensing Imagery

Lee

Duong

et al. 2022

Water Resources Research

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“…Como foi possível observar, em geral, grande parte dos estudos utilizam abordagens de regionalização com relação à similaridade climática e fisiográfica e/ou que calibram simultaneamente várias regiões com características semelhantes (DU et al, 2020). Ou seja, independente da metodologia a ser aplicada, a escolha de parâmetros explicativos da variável a ser regionalizada é uma etapa crucial, devendo ser selecionados aqueles que melhor representam as principais características do regime hidrológico da região (PRIETO et al, 2019).…”

Section: Em Um Estudo Realizado Na Bacia Do Alto Do São Francisco (Mgunclassified

“…Contudo, para uma análise mais minuciosa da influência das chuvas nos modelos é importante, a partir dos modelos aqui propostos, realizar mais estudos acerca da sazonalidade na região, visto que a região possui duas estações bem definidas, sendo a sazonalidade um fator importante na disponibilidade hídrica de uma região(BESKOW et al, 2016).Apesar do bom desempenho dos modelos hidrológicos em escala global, vale ressaltar que nem sempre eles apresentam desempenho satisfatório em todas as estações de seus domínios territoriais, assim, restringe-se sua aplicação para fins de gerenciamento(DU et al, 2020). Desse modo, os modelos hidrológicos representam uma importante ferramenta na gestão dos recursos hídricos, principalmente em países em desenvolvimento, como o Brasil, em que a disponibilidade de dados observados ao longo do território é baixa e recente.…”

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Regionalização hidrológica para o estado de Goiás e Distrito Federal

Charles¹

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À minha mãe Simone, que com toda sua força e dedicação me mostrou que a educação é a chave da mudança. Ao meu padrasto Adriano, que com toda sua paciência, respeito e honestidade me ajudou a ser uma pessoa melhor. Aos meus irmãos João Pedro e Ana Clara, amores da minha vida, que entendem minha ausência e são o motivo pelo qual busco ser melhor a cada dia. Aos meus avós Irany, Gentil (in memorian) e Carolina (in memorian), que com humildade e muito amor me proporcionaram os maiores ensinamentos. As minhas tias, que posso chamar de mãe, Elizete, Maria Aparecida e Sandra, por todo amor e carinho e por sempre acreditarem no meu potencial. Aos meus primos André, Taynara, Tamires, Isabela e Juan, por estarem sempre dispostos a me escutar, tenho sorte de ter vocês ao meu lado.

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Reservoir operation impacts on streamflow and sediment dynamics in the transboundary river basin, Vietnam

Bui,

Kantoush,

Kawamura

et al. 2023

Hydrological Processes

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Human interventions activities around the world, particularly reservoir operation, have dramatically altered hydrological and sediment regimes in most of the major river basins. In the Mekong River, specifically the Upper Srepok River Basin (USRB) which is a main tributary of the river basin connected to the Mekong Delta's rice bowl and the Tonle Sap Lake's top inland fisheries, there are increasing concerns about the impacts of cascade reservoir operations on downstream streamflow and sediment budgets. Previous studies estimating impacts either relied solely on observed data or did not verify simulations of regulated streamflow. Using a process‐based hydrological model calibrated and validated for both natural and regulated streamflow in the USRB, it was found that the monthly hydrological changes were up to ±20% compared to pre‐dam periods at the most downstream station bordering between Vietnam and Cambodia (i.e., Ban Don station). The basin also experienced a slight decrease (less than 2%) in annual streamflow. Additionally, average and peak suspended sediment concentration decreased significantly in both of the annual and seasonal periods. At the Ban Don station, sediment loads were reduced 140 thousand tons/year (i.e., 15%) compared to pre‐dam period. Most of the changes in streamflow and sediment budgets in the basin were driven by the Buon Tua Srah reservoir, which had the highest degree of regulation in the basin. Therefore, integrated and transboundary water and sediment management, particularly at Buon Tua Srah reservoir, needs to be developed for the sustainability of the river basin.

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Streamflow prediction in “geopolitically ungauged” basins using satellite observations and regionalization at subcontinental scale

Cited by 19 publications

References 74 publications

Streamflow Prediction in Highly Regulated, Transboundary Watersheds Using Multi‐Basin Modeling and Remote Sensing Imagery

Streamflow Prediction in Highly Regulated, Transboundary Watersheds Using Multi‐Basin Modeling and Remote Sensing Imagery

Regionalização hidrológica para o estado de Goiás e Distrito Federal

Reservoir operation impacts on streamflow and sediment dynamics in the transboundary river basin, Vietnam

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