riverbed evolution 中文意思是什麼
riverbed evolution
解釋
河床演變-
Inflow of anabranches together with the erosion of riverbank and riverbed is important to the evolution and the sustainable function in middle - lower reaches of the hanjiang river
支流入匯和河岸、河底侵蝕一起，是影響下遊河床演變、維持河道功能的重要因素。 -
Based on the riverbed evolution analyses of the downstream reach of oujiang estuary and physical model test of eight types of regulation projects, an estimation method for nondeposit velocity satisfying channel depth is presented under fixed bed model test condition
摘要通過對甌江口外段河床演變分析，以及8種航道治理工程的物理模型試驗，提出了在定床試驗條件下滿足航道水深所需的不淤流速的估算方法。 -
At present, many fields remain to further research, especially the profound combination of gis technique with ece ( estuarine and coastal engineering ), which should be developed for the purposes as follows : ( 1 ) to serve the huge comprehensive work in changeable natural conditions and difficult construction conditions which takes a long period and covers a large region, e. g. the regulation work of deepwater channel in the yre ( yangtze river estuary ) ( 2 ) to combine the gis with applied numerical model ( 3 ) to study the hydrodynamic processes and characteristics of waves, tidal currents and sediment transport, as well as the affection carried by the regulation work in an estuary ( 4 ) to monitor and to analyze ees ( evolution of erosion and sedimentation ) and the variation of riverbed ( 5 ) to play a role of dynamic supervising of a engineering project
目前尚有許多有待進一步研究的領域，尤其是以服務于長江口深水航道治理這樣規模大、周期長、影響區域廣、自然條件復雜、施工情況多變的國家重點工程為目的，將gis與專業應用數學模型結合，對河口海岸波浪、潮流、泥沙運動的動力機制，以及整治工程建築物對其影響的研究，對入海航道沖淤和河勢演變的監測分析，對施工進展和工程效果實現「動態」監控和管理，尚缺乏同gis技術的深入有效結合。 -
The extreme effects of sand mining on local deformation of riverbed and evolution of river stretch in typical river sections such as straight river section, river bend and river fork are experimentally studied in micro - scale loose bed hydraulic model
摘要採用微尺度動床河工模型試驗的方法研究了在順直、彎道與分汊等典型河道不同部位進行大規模采砂對河床局部變形及對河段變形的極限影響。
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