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首页> 外文期刊>Journal of Hydrology: Regional Studies >Future hydrological alterations in the Mekong Delta under the impact of water resources development, land subsidence and sea level rise
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Future hydrological alterations in the Mekong Delta under the impact of water resources development, land subsidence and sea level rise

机译：在水资源开发，地面沉降和海平面上升的影响下，湄公河三角洲未来的水文变化

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Graphical abstract Display Omitted Highlights ? Dams are the main drivers of hydrological alterations in river-dominated regions. ? Dyke development is more significant than other factors in the wet season. ? Sea level rise will be the main driver of flooding in the Vietnam Mekong Delta. ? Land subsidence lengthens flood duration and depths. ? Appropriate water management strategies are needed corresponding to each driver. Abstract Study region The Mekong floodplains and delta are among the most agriculturally productive and biologically diverse waterscapes of the world, but sea level rise, land subsidence, and the proposed upstream development of over 126 hydropower dams and extensive delta-based water infrastructure have raised concern due to potential impacts on the hydrology of the region. Study focus This study aims to quantify the effects of water infrastructure development, land subsidence and sea level rise on hydrological regimes of the Mekong floodplains and delta through the development and application of a hydrodynamic model. New hydrological insights for the region Depending on hydrological characteristics of each region (river-dominated, transitional or tidal), the influence of each potential driver may vary. The operation of proposed hydropower dams would change river-dominated upper floodplain’s water levels by 26 to 70% and ?0.8 to ?5.9% in the dry and wet season respectively, but the impact diminishes throughout the floodplains. In the wet season, the upper Vietnamese Delta changes from a transitional stage to a river-dominated stage, and localized water infrastructure development in the upper delta has the greatest effect on water levels in the region. Land subsidence combined with sea level rise could have the greatest future influence on flooding in the delta if current rates are extrapolated. Sustainable water management strategies are thus necessary to mitigate changes in the floodplains and delta and increase resilience to sea level rise and land subsidence.
机译：图形摘要显示省略的突出显示？大坝是河流控制地区水文变化的主要驱动力。 ？在雨季，堤防的发展比其他因素更为重要。 ？海平面上升将是越南湄公河三角洲洪水的主要驱动力。 ？地面沉降会延长洪水持续时间和深度。 ？需要与每个驱动程序相对应的适当水管理策略。摘要研究区域湄公河漫滩和三角洲是世界上农业生产和生物多样性最丰富的水域之一，但是海平面上升，土地沉降以及拟议的超过126个水电大坝的上游开发以及基于三角洲的广泛水利基础设施引起了人们的关注由于可能对该地区的水文影响。研究重点本研究旨在通过开发和应用水动力模型来量化水利基础设施建设，地面沉降和海平面上升对湄公河漫滩和三角洲水文状况的影响。该地区的新水文见解根据每个地区的水文特征（河流为主，过渡或潮汐），每个潜在驱动因素的影响可能会有所不同。拟建的水电站大坝的运行将在旱季和雨季将河流为主的上冲平原的水位分别降低26％至70％，将0.8％降至0.8％至5.9％，但在整个洪泛区的影响将减小。在雨季，越南三角洲的上游地区从过渡阶段过渡到河流为主的阶段，上游三角洲的局部水基础设施建设对该地区的水位影响最大。如果以目前的速度来推算，地面沉降与海平面上升相结合可能对三角洲的洪灾产生最大的未来影响。因此，必须采取可持续的水管理策略来减轻洪泛区和三角洲的变化，并增强对海平面上升和地面沉降的适应能力。

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