| 引用本文: | 薛海,刘震,刘明潇,等.基于安全行洪与滩区建设协调的冲积性河流洪水特性研究[J].灌溉排水学报,0,():-. |
| XUE Hai,liuzhen,liumingxiao,et al.基于安全行洪与滩区建设协调的冲积性河流洪水特性研究[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】为促进河流流域的高质量发展，利用广阔河漫滩进行适度开发建设成为趋势；了解人类活动影响下的冲积性河流洪水特性，提出与河流安全行洪协调一致的滩区工程建设准则，才能科学统筹河流健康保护与流域高质量发展。【方法】以某冲积性河流宽滩区拟开发生态绿道为研究对象，采用基于实测资料的河道历史演变分析，研究了目标所在河段洪水特性、河道演变规律、水库下游的河床调整因素及河床冲淤趋势，探寻了预测河床边界的处理模式与河流工程等效阻力。通过平面二维洪水水动力数值模拟计算，分析了涉及河段的洪水特性及线路对行洪期流场的影响。【结果】模拟研究首先表明整治工程可有效限制河段主流自由摆动度，确保涉及河段洪水河势基本不变；其次将绿道远离河槽布置且顺槽平行布线，则滩区过流面积阻水比小于2.6%，绿道建设引起的局部壅水低于0.058 m。【结论】通过科学规划线路与工程布置，可以将工程对河流洪水传播的影响降至最低，有效保障河道行洪安全与滩区开发建设的协调关系。 |
| 关键词: 冲积性河流；滩区开发；水动力模拟；河势；行洪安全；阻水比 |
| DOI： |
| 分类号:TV147.3 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| Research on the Flood Characteristics of Alluvial River Ensuring the balances between Flood Control and Beach Construction |
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XUE Hai, liuzhen, liumingxiao, xumengxin, sundongpo, zhuyongjie
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North China University of Water Resources and Electric Power
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| Abstract: |
| 【Background】The floodplain is the ecological cradle and the flood buffer zone of an alluvial river system. Nature gives rivers the function of transport runoff and sediment, making the river has the double section characteristics of river trough and beach to meet the needs of water and sediment transportation in different periods. There are also many villages in the vast floodplain area of some rivers. There will inevitably be some contradictions between the needs of human activities (such as agricultural irrigation, transportation and social development) and the river's own functions (ecology, flood and sediment transportation). If there is no scientific coordination between the two aspect, it will lead to mutual restriction, and affect the ecological health of the river as well as the Sustainable high-quality development of the beach area society. It has become an important challenge for river managers to plan traffic routes in wide floodplain areas with less environmental impact. In order to implement the protection of river health in river project construction, the characteristics of alluvial river flood must be understood under the influence of human activity. 【Objective】Taking advantage of the vast river floodplain to conduct the appropriate development and construction, it would be helpful to promote the high-quality development of the river basin. Learning more about the flood characteristics of alluvial rivers under the influence of human activities, and proposing a solution scheme to realize the coordination of floodplain engineering construction and river safety flood discharge, it would contribute to practicing the protection of river health in constructing the river engineering. 【Method】Taking a proposed eco-tourism greenway in the wide floodplain area of an alluvial river as an investigation objective, using the comprehensive research method involving historical evolution analysis, riverbed scouring-depositing prediction and hydrodynamic numerical simulation, the flood characteristics of the engineering reach, the law of river course evolution, the riverbed adjustment factors at the lower reaches of the reservoir were analyzed. The treatment model for predicting the riverbed boundary and the equivalent resistance of the river engineering were researched. By means of the plane two-dimensional flood numerical simulation calculation, the flood characteristics of the river section involved in the greenway and the influence of the route on the flow field during the flood discharge period were also analyzed. 【Result】 Firstly, the simulation research shows that the free swing of the mainstream of the river is restricted by the regulation projects, and the river regime in flood period is basically unchanged. Secondly, the proposed greenway is far away from the river channel and routing in parallel along the channel, which make sure that the water blocking ratio of the flow area in the beach area less than 2.6%, and the local backwater caused by road construction limited in 5.8cm. 【Conclusion】The arrangement of the proposed greenway is suggested to be routed along the river, away from river channel and located in high beach. Through scientific planning of routes and project layout, the impact of the project on the propagation of river floods can be minimized largely, and the coordinated relationship between the river flood discharge safety and the beach area development could also be satisfied. |
| Key words: alluvial river; floodplain development; hydrodynamic simulation; river regime; flood discharging safety; water resistance ratio |
