深河槽 的英文怎麼說
中文拼音 [shēnhécáo]
深河槽
英文
gut-
Abstract : the qiantang estuary with violent hydrodynamic conditions is well known for its tidal bore. the regulation of the estuary in the past, especially the progress since the founding of new china are reviewed. the principles of the regulation and planning of the qiantang estuary formulated in 1960s are expounded, i. e., to narrow the river to reduce the tidal prism, and to increase the ratio of the river flow to tidal discharge. the experience of estuary regulation / reclamation is summarized, especially the engineering measures to protect the groin head and to use polder dykes as sea defense works. finally, the effect is analyzed of the large - scale constraction / reclamation in the estuary on the tides, flooding high water level, estuary bed and the northern deep waterway in the hangzhou bay
文摘:以涌潮聞名的錢塘江河口，動力強勁，破壞力極大.回顧錢塘江河口歷代治理情況，重點記述1949年以來治理工作的進展，論述60年代提出的錢塘江河口治理規劃的指導思想，即縮窄江道，減少進潮量，增大山潮水比值的整治原則.總結整治規劃實施過程中治江圍塗經驗，特別是「以圍代壩」和丁壩壩頭保護等工程措施.分析錢塘江河口大規模治江圍塗后對錢塘江河口潮汐、洪水位、河床以及杭州灣北岸深槽的影響First, according to measured data and literature, the river channel evolution rule and its reasons in the southern branch of the yangtze river are discussed from the perspectives of historic evolution, recent evolution and the tendency prediction of river channel evolution. besides, the local reservoir has been studied from the changes in thalweg and section as well as the calculation of local erosion and deposit. consequently, the stability and feasibility of reservoir construction in the river section are approved
首先根據大量實測資料及文獻資料，就歷史變遷、近期演變、河演趨勢預測等方面，初步探討了長江口南支河段河道演變規律及原因，並具體就深泓線的變化、主槽斷面變化、局部沖淤計算等方面對擬建水庫局部區域進行了分析，論證了工程河段建設水庫的穩定性及可行性。Then river width increased and the intensity of deep point lowing and bed material coarsening decreased and water level lowed continuously. so the bed form changed toward to u type. the bed regulation is realized through sediment silting in different parts in cross section during silting period and the deformation of bed form changed from broad u type channel to narrow and deep v type channel
研究表明，河道在持續沖刷前期深泓點及水位下降與河床粗化同步發展，河床向v型發展；沖刷後期深泓點下降、河床粗化減弱，河道展寬增大，水位繼續下降，河床向u型發展；在以淤積為主時期的調整，是通過斷面不同部位的淤積來實現的，但都是由u型較大河槽向v型窄深小槽發展。From the model experiments, riffles in observed channel disappeared and were replaced by narrow depth channel with deeper stages
在實驗過程中，河道之河灘地形相繼消失，取而代之是明顯的深槽，使水深相對的提高。In this thesis, first, reasons and factors for the stability of loose rock dams were summarized according to the field surveys and certain expert ' s experiences. then, researches on block stability problems were reviewed, and according to the relationship between grain size and incipient velocity, it is found that the block weight is in direct proportion to 6 - 9 power of incipient velocity, and 50 % increase of the velocity will result in about 40 times change of the block weight. after that, experiments were conducted in a flume, focusing on the relationship between incipient velocity and some main factors including block weight, water depth over the dam, cross - section size, block material and river bed material
本文首先根據散拋石壩損毀情況的現場調查資料，結合有關專家多年的整治經驗，總結出壩體的損毀原因及影響因素；對現有塊體穩定性的研究成果進行回顧和總結，並針對散拋石壩的直接損毀現象，結合山區河流的水流、地形特點，利用塊體粒徑與起動流速的關系，提出塊體穩定重量與起動流速高次方成正比的概念，流速50的增長可能導致塊體穩定重量接近40倍的變化；通過二維變坡水槽試驗，研究了壩體穩定的主要影響因素，包括塊體重量、壩頂水深、斷面尺寸、塊體材料（塊石和卵石兩種） 、護底等，結果表明對于山區河流，試圖僅僅通過增加壩體單個塊體重量或斷面尺寸來提高壩體穩定性效果甚微；最後，根據西部地區的自然、經濟、交通等條件，提出可以採用柔性混凝土鉸鏈體等一類整體性較好的護面層作為散拋石壩的防沖毀措施，以期取得良好的工程效果。Effects of maintenance and raise of water level at yichang station by river bottom protection and roughness addition method and pool back - fill method in the reach from yichang to zhicheng of the changjiang river are calculated and compared by using a 2 - d flow numerical simulation method
摘要運用二維水流數值模擬方法，計算比較了在宜昌枝城的長江河段內選取重點控制河段，進行護底加糙及回填深槽對維護並抬高宜昌水位的效果。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。By use of the morphological coefficients of estuarine riverbed and the relevant data of the north channel of the yangtze river estuary, the widening rate of the regulation line of the north deep - water channel of the yangtze river estuary is calculated, and the calculation result is in agreement with that of the fixed bed model test
利用已有的河口河床形態系數及長江口北槽的有關數據，估算了長江口北槽深水航道治導線的放寬率，且與定床物理模型試驗值基本相符。分享友人