Parameter uncertainty analysis for simulating streamflow in the upper Dong Nai river basin

Khôi, Đào Nguyên; Thom, Vu Thi; Quang, Chau Nguyen Xuan; Phi, Ho Long

doi:10.1051/lhb/2017003

Cited by 11 publications

(6 citation statements)

References 20 publications

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“…There are five calibration techniques built in the SWAT-CUP, such as GLUE (Generalized Likelihood Uncertainty Estimation), MCMC (Markov Chain Monte Carlo), ParaSol (Parameter Solution), PSO (Particle Swarm Optimization), and SUFI-2. Amidst these techniques, the SUFI-2 technique was selected because this technique could provide more satisfactory and accurate simulation in the tropical region as compared to other techniques (Khoi et al 2017). The calibration and validation steps were conducted for the periods of 1987-1995 and 1996-2013, correspondingly. The reproducibility of the SWAT model in simulating the river discharge was judged after the model calibration and validation.…”

Section: Swat Hydrological Modelmentioning

confidence: 99%

Assessment of climate change impact on water availability in the upper Dong Nai River Basin, Vietnam

Khôi

Nguyen

Sam

et al. 2021

Journal of Water and Climate Change

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On a global scale, climate change is projected to have detrimental impacts on water availability. This situation will become more severe owing to accumulated impacts of climate change and anthropogenic activities. This study aims to investigate climate change impact on water availability in the upper Dong Nai River Basin using the Soil and Water Assessment Tool (SWAT) and Water Evaluation and Planning (WEAP) models. Future rainfall scenarios were downscaled from five different general circulation models under RCP4.5 and RCP8.5 using the Long Ashton Research Station Weather Generator (LARS-WG) tool. Under the climate change impact, annual river discharge in the study region is generally projected to have upward trends in the future, except for the near-future period of 2030s under RCP4.5. In addition, dry-seasonal river discharge is expected to be increased in the future. Considering the baseline condition of water use, there was an annual water shortage of approximately 32.9 × 103 m3, which mostly occurred in the dry season from January to March. Climate change may reduce the water shortage in the study region ranging from 7.0 to 30.1% in the future. Under the combined impacts of climate change and increasing water demand, the water shortage will vary from −18.6 to 6.0% in the future. The results can provide valuable insights to implement appropriate future water resources planning and management in the study region.

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Section: Swat Hydrological Modelmentioning

confidence: 99%

Assessment of climate change impact on water availability in the upper Dong Nai River Basin, Vietnam

Khôi

Nguyen

Sam

et al. 2021

Journal of Water and Climate Change

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“…Based on the success of streamflow calibration and validation, the model was continuously calibrated and validated for the simulation of nutrient (T-N and T-P) and sediment (TSS) loads for the period 2010-2015 at a monthly time scale. The model calibration and validation were conducted by the SWAT Calibration and Uncertainty Program (SWAT-CUP) using Sequential Uncertainty Fitting (SUFI-2) due to its efficiency [15,16].…”

Section: Swat Modelmentioning

confidence: 99%

Evaluation on Effects of Climate and Land-Use Changes on Streamflow and Water Quality in the La Buong River Basin, Southern Vietnam

et al. 2019

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The effects of climate and land-use changes have put intense pressures on water resources with regard to water quantity and quality in the La Buong River Basin, located in Southern Vietnam. Therefore, an estimate of such effects and their consequences on water resources in this area is needed. The aim of this study is to evaluate the segregated and aggregated effects of climate change and land-use change on streamflow and water quality components (sediment and nutrient loads) using the well-known Soils and Water Assessment Tool (SWAT). The SWAT model was carefully calibrated and validated against the observation data before it can be used as a simulation tool to study the impacts of climate and land-use changes on hydrological processes. As a result of this study, it shows a reduction in the wet-season and annual streamflow, and sediment and nutrient loads will be occurred in the study area due to climate change effects, while the streamflow, and sediment and nutrient loads will be increased under the effects of the land-use change. Moreover, the streamflow and water quality components are more sensitive to land-use change than climate change. The results obtained from this study can provide a basic knowledge of the effects of climate and land-use changes on the streamflow and water quality to the local and national authorities for the future development of integrated water resources management in the La Buong River Basin.

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“…The Sequential Uncertainty Fitting version 2 (SUFI-2) algorithm in SWAT Calibration and Uncertainty (SWAT-CUP) Program (Abbaspour 2015) was utilized for the SWAT calibration. The model calibration utilized 12 parameters related to surface, subsurface, and channel hydrological responses, which were chosen in reliance on a review of similar literature (e.g., Khoi et al 2017;Thang et al 2018;Adhikari et al 2020). Based on the availability of the measured discharge data, the calibration step was carried out for the period of 1981-1990 and the validation step was conducted for the period of 1991-1993 at the Phuoc Long stream gauge and 1991-2000 at the Phuoc Hoa, Ta Lai, and Ta Pao stream gauges.…”

Section: Swat Setup Calibration and Validationmentioning

confidence: 99%

Impact of future climate change on river discharge and groundwater recharge: a case study of Ho Chi Minh City, Vietnam

Khôi

Sam

Thao

et al. 2022

Journal of Water and Climate Change

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Climate change (CC) is likely to have a long-term influence on regional water resources, including surface water and groundwater. Therefore, quantifying the CC influence is indispensable for proper management of water resources. This study scrutinized the influence of CC on river discharge and groundwater recharge (GWR) in Ho Chi Minh City (HCMC), Vietnam, utilizing the Soil and Water Assessment Tool (SWAT). The calibrated SWAT was utilized to simulate the discharge and GWR under projected climate scenarios in reliance on an ensemble of seven General Circulation Models (GCMs) derived from Coupled Model Intercomparison Project Phase 6 (CMIP6) under three Shared Socioeconomic Pathways (SSPs), including SSP1-2.6, SSP2-4.5, and SSP5-8.5. Results pointed out that the climate of HCMC is warmer and wetter in the 21st century. Under the CC influence, the future discharge is envisaged to rise from 0.1 to 4.5% during the near-future period of 2030s (2021–2045), 8.1 to 11.6% during the mid-future period of 2055s (2046–2070), and 7.7 to 19.6% during the far-future period of 2080s (2071–2095) under the three SSP scenarios. In addition, the GWR is prognosticated to have rising trends of 0.9–4.9%, 5.3–7.9%, and 5.7– 13.5% during the near-future, mid-future, and far-future periods, respectively. Furthermore, uncertainties in the discharge and GWR projections connected with SSP scenarios and CMIP6 GCMs are considerable.

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Parameter uncertainty analysis for simulating streamflow in the upper Dong Nai river basin

Cited by 11 publications

References 20 publications

Assessment of climate change impact on water availability in the upper Dong Nai River Basin, Vietnam

Assessment of climate change impact on water availability in the upper Dong Nai River Basin, Vietnam

Evaluation on Effects of Climate and Land-Use Changes on Streamflow and Water Quality in the La Buong River Basin, Southern Vietnam

Impact of future climate change on river discharge and groundwater recharge: a case study of Ho Chi Minh City, Vietnam

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