Hydraulic and water quality modeling: a tool for managing land use conflicts in inland coastal zones

Hoanh, Chu Thai; Phong, Ngo Dang; Gowing, John; Tuong, To Phuc; Ngọc, Nguyễn Văn; Hiền, Nguyễn Xuân

doi:10.2166/wp.2009.107

Cited by 23 publications

(21 citation statements)

References 9 publications

(1 reference statement)

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“…The Vietnam River Systems and Plains (VRSAP) model was also developed at a similar time to simulate water flow, tidal effects, and salinity intrusion in the Mekong Delta. The VRSAP model has been continuously updated and improved [121]. Various other water resource models including the MRC's Decision Support Framework (DSF), DHI's MIKE BASIN, and Water Utilization Program-Finnish Environment Institute (WUP-FIN) have been used to assess water resources at basin to sub-basin levels.…”

Section: Hydrological Modelingmentioning

confidence: 99%

A Review of the Integrated Effects of Changing Climate, Land Use, and Dams on Mekong River Hydrology

Pokhrel

Burbano

Roush

et al. 2018

Water

184

112

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Abstract:The ongoing and proposed construction of large-scale hydropower dams in the Mekong river basin is a subject of intense debate and growing international concern due to the unprecedented and potentially irreversible impacts these dams are likely to have on the hydrological, agricultural, and ecological systems across the basin. Studies have shown that some of the dams built in the tributaries and the main stem of the upper Mekong have already caused basin-wide impacts by altering the magnitude and seasonality of flows, blocking sediment transport, affecting fisheries and livelihoods of downstream inhabitants, and changing the flood pulse to the Tonle Sap Lake. There are hundreds of additional dams planned for the near future that would result in further changes, potentially causing permanent damage to the highly productive agricultural systems and fisheries, as well as the riverine and floodplain ecosystems. Several studies have examined the potential impacts of existing and planned dams but the integrated effects of the dams when combined with the adverse hydrologic consequences of climate change remain largely unknown. Here, we provide a detailed review of the existing literature on the changes in climate, land use, and dam construction and the resulting impacts on hydrological, agricultural, and ecological systems across the Mekong. The review provides a basis to better understand the effects of climate change and accelerating human water management activities on the coupled hydrological-agricultural-ecological systems, and identifies existing challenges to study the region's Water, Energy, and Food (WEF) nexus with emphasis on the influence of future dams and projected climate change. In the last section, we synthesize the results and highlight the urgent need to develop integrated models to holistically study the coupled natural-human systems across the basin that account for the impacts of climate change and water infrastructure development. This review provides a framework for future research in the Mekong, including studies that integrate hydrological, agricultural, and ecological modeling systems.

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Section: Hydrological Modelingmentioning

confidence: 99%

A Review of the Integrated Effects of Changing Climate, Land Use, and Dams on Mekong River Hydrology

Pokhrel

Burbano

Roush

et al. 2018

Water

184

112

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“…& Basin-scale assessment of changes due to projected broadly-based WR development or Friend et al 2006;Kummu and Sarkkula 2008) & Local assessment of impacts of specific developments (environmental impact assessments) (Hoanh et al 2009b). …”

Section: Water Allocation Impact Assessment and Modelsmentioning

confidence: 99%

“…A number of different models were developed for the Delta to simulate water flow, tidal effects and salinity intrusion. These include the Vietnam River Systems and Plains (VRSAP) model, developed by the Vietnam Sub-Institute for Water Resources Planning and Management in the 1980s and continuously updated and improved since then (Hien 1999;Hoanh et al 2009b); the Mekong Delta Master Model developed by Delft Hydraulics in 1991 (van Mierlo and Ogink 1991); and models to study salinity intrusion and tidal dynamics, for example, MEKSAL (Nguyen 1987).…”

Section: Historical Review Of Mekong Modellingmentioning

confidence: 99%

“…Flood reports are published on the MRC website and bulletins are emailed daily to a wide range of stakeholders and concerned parties (Apirumanekul 2006;Tospornsampan et al 2009). At more local scale, VRSAP has been used successfully in the Delta in Vietnam to asses sluice operation modalities to balance the different water quality needs of rice and brackish water shrimp culture (Hoanh et al 2009b).…”

Section: Model Applications and Outcomes For Policymentioning

confidence: 99%

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Water Resource Models in the Mekong Basin: A Review

Johnston

Kummu

2011

Water Resour Manage

109

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Development of the water resources of the Mekong Basin is the subject of intense debate both within the Mekong region and internationally. Water resources modelling is playing an increasingly important role in the debate, with significant effort in building integrated modelling platforms to describe the hydrological, ecological, social and economic impacts of water resource development. In the hydrological domain, a comprehensive set of models has been effective in building understanding of the system, and in identifying and describing the issues and trade-offs involved in basin-scale water planning. In the ecological and social domains, quantitative modelling has not progressed very far; geo-spatial analysis and qualitative frameworks remain the most commonly used tools. Economic models have been used to assess the costs and benefits of water resources development and to describe the trade-offs between different sectors and users. These analyses are likely to play an important role in the policy and planning debate, but are hampered by uncertainties in valuation of ecosystem services. Future efforts should focus on optimising the use of existing model platforms for the Mekong, including structured comparison of multiple hydrological models to quantify errors and identify an optimum set of modelling tools for different applications. A comprehensive research effort is needed to incorporate groundwater into hydrological models for regional planning. Options for social impact assessment should be reassessed before major investments are made in complex modelling platforms, and participatory social survey methods evaluated as part of an integrated assessment framework.

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“…Actually, in the past (decades ago), floods were kept in backswamp areas in order to not only supply freshwater flow in main canals during the early dry season (Dang et al, 2007), but also to reduce the flood during the peak periods. For the irrigated rice-based farming systems the possible adaptation measures might be applied in the VMD, including (i) adjusting the cropping seasons could be a suitable adaptation measure to avoid the peaks of the flood (ADB, 2010;Mainuddin and Kirby, 2009); (ii) shifting from rice intensification systems into livelihood diversification; (iii) alternating wetting and drying irrigation methods (Belder et al, 2004); and (iv) diversifying cropping patterns (Hoanh et al, 2009). Moreover, to study the nature of the future flood in the VMD, climate change aspects (upstream discharge changes and sea level rise) should not be considered separately from other factors (e.g.…”

Section: Impacts Of the Flood On The Agriculture In The Vmdmentioning

confidence: 99%

A study of the climate change impacts on fluvial flood propagation in the Vietnamese Mekong Delta

Văn

Popescu

Griensven

et al. 2012

Hydrol. Earth Syst. Sci.

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Abstract. The present paper investigated the extent of the flood propagation in the Vietnamese Mekong Delta under different projected flood hydrographs, considering the 2000 flood event (the 20-yr return period event, T. V. H. as the basis for computation. The analysis herein was done to demonstrate the particular complexity of the flood dynamics, which was simulated by the 1-D modelling system ISIS used by the Mekong River Commission. The floods of the year 2050 are simulated using a projected sea level rise of +30 cm. The future flood hydrograph changes at Kratie, Cambodia, were also applied for the upstream boundary condition by using an adjusted regional climate model. Two future flood hydrographs were applied at the upstream part of the delta, the first one in a scenario of climate change without considering developments in the Mekong Basin,and the second one in a scenario of climate change taking into account future development of the delta. Analyses were done to identify the areas sensitive to floods, considering the uncertainty of the projection of both the upstream and downstream boundary conditions. In addition, due to the rice-dominated culture in the Vietnamese Mekong Delta, possible impacts of floods on the rice-based farming systems were also analysed.

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Hydraulic and water quality modeling: a tool for managing land use conflicts in inland coastal zones

Abstract: Draft of paper presented at the International Conference on Environment and Livelihoods in Coastal Zones: Managing Agriculture-Fishery-Aquaculture Conflicts, Bac Lieu, Vietnam, 1-3 March 200

Cited by 23 publications

References 9 publications

A Review of the Integrated Effects of Changing Climate, Land Use, and Dams on Mekong River Hydrology

A Review of the Integrated Effects of Changing Climate, Land Use, and Dams on Mekong River Hydrology

Water Resource Models in the Mekong Basin: A Review

A study of the climate change impacts on fluvial flood propagation in the Vietnamese Mekong Delta

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