river bed variation 中文意思是什麼
river bed variation
解釋
河床變化-
Effect of water and sediment variation on erosion and deposition of weihe river bed
渭河水沙條件變化對河床沖淤的影響分析 -
Basic equation for variation of bed material composition in active layer of alluvial river
沖積河流混合活動層內床沙級配變化的動力學基本方程 -
Based on the analyses of the flow and sediment characteristics and evolution trend of the river bed of the fuling reach in the yangtze river before and after the impoundment of the three gorges reservoir, the water level, velocity variation and influenced range in the fuling reach before and fifty years after the operation of the three gorges reservoir with the construction of the fuling dock and four discharge combinations are calculated by using a two - dimensional flow mathematic model
摘要在分析長江涪陵段的水沙特性和三峽水庫蓄水前後該河段河床演變趨勢的基礎上，運用二維水流數學模型，分析了4種流量組合情況下在三峽水庫運用前和運用50年，涪陵港區碼頭修建前後的水位、流速變化及其影響范圍。 -
Especially for resent years, because the conditions of coming discharge and sediment have occurred un - corresponding variation, shrink ' s velocity increases serious rapidly, shrink ' s characters tend to be serious, the river bed have been heightening continuously, from these, they have lead to various disaster effects obviously and brought heavy pressure for flood control and river harnessing
黃河下遊河道為嚴重的萎縮性河道。尤其是近年來，由於來水來沙條件發生非協調性變異，萎縮速率明顯加快，萎縮性更趨嚴重，河床持續抬高，由此引起的各種災害效應愈加明顯，對防洪及河道治理產生巨大壓力。 -
Test results show that spur dikes aligned along a single bank in the deep water zone have more effects on the adjustment of the bed topography of the wide - shallow river than in the shallow water zone ; alignment of spur dikes along both banks can effectively adjust the planimetric position of deep - water zone ; and a reasonable widening rate of the regulation line in the estuary can readjust the variation of the average water depth along the river
試驗結果表明，在深水區的單側丁壩群對寬淺河床地形的調整作用大於淺水區；雙側丁壩群的聯合作用能調整深水區的平面位置；合理地選擇治導線的放寬率，能有效地調整深槽平均水深的沿程變化。
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