bed load 中文意思是什麼

bed load 解釋
河床上被水流帶來的沙石等。

  • bed : n 1 床，床鋪；床位，鋪；（動物的）窩；〈比喻〉安樂窩，墳墓；床墊；睡眠；就宿。2 婚姻，夫婦關系。3...
  • load : n 1 裝載，擔子；負擔；工作（負荷）量。2 （車船等的）裝載量；一馱，一車，一飛機。3 【電、機】（機...
  1. Aggrading streams heavily charged with bed load may fill their channels nearly to the top of the banks.

    帶有大量推移質的堆積河流可以把河槽淤高到幾乎與岸頂齊平。
  2. Bed load particles move spasmodically, perhaps at long intervals, and are at rest on the stream bed most of the time.

    推移質顆粒多半作間歇運動，而大部分時間則停歇在河床上。
  3. Technical standard for measurements of bed load and bed material in open channels

    河流推移質泥沙及床沙.測驗規程
  4. The deposition of bed load sediment was greatly reduced in the sump by adding a flushing gallery

    通過在集水池底設置排沙廊道，較好地解決了推移質泥沙淤積問題。
  5. In the bed load layer, the stream - wise particle velocity profile follows the log - law, and the average is 8. 2u *

    在推移區內，顆粒的縱向速度沿垂線接近對數分佈，平均運動速度為8
  6. The quantities of organic carbon and nitrogen in the bed load were high than in the runoff plots and this had a nutrient enrichment phenomenon

    4 ，在徑流流失的氮素中又以水溶態氮素為主，約占徑流流失氮素的78 87
  7. Based on the study of sediment transport under the actions of tidal currents and wind waves, a mathematical model of suspended load and bed load for yangtze estuary is developed

    摘要通過對長江口徑流、潮流和波浪共同作用下的泥沙運動規律的研究，開發並建立了長江口全沙（懸沙和底沙）數學模型。
  8. The scale effects due to unsimilar bed risistance is discussed in detail, and the correct way of scour depth is supposed. at last, a new transport rate formulas of uniform or nonuniform bed load is given

    本文還對由於阻力不相似而引起的比尺效應進行了較詳細的討論，從理論上給出了沖刷深度比尺效應的修正方法及新的均勻、非均勻推移質輸沙率的計算公式。
  9. ( 4 ) the percentage phosphorus loss by bed load was equivalent to mat lost as a result of runoff in traditional fanning practices, whereas in the rest of farming system the loss by runoff phosphorus was 67. 59 % - 88. 11 %

    （ 4 ）順坡農作處理的徑流小區通過椎移質流失的磷素和邁過徑流流失的磷素基本相當，其它處理的土壤磷素主要以徑流方式流失，其流失量占土壤全磷流失量67
  10. Suspended and bed load transport were simulated with a non - equilibrium method. the source treatments in sediment transport equations, suspended load carrying capacity of the non - uniform material and exchange of size - distribution of the bed material are presented. 5

    二維懸沙和底沙運移採用不平衡輸沙模式，分析輸沙方程的源項處理以及非均勻沙分組挾沙能力和床沙級配調整。
  11. The verification results show that the model can simulate well the tidal levels, current velocities, sediment concentration, bed load transport, diversion ratio in the bifurcation section, topographic change of the north and south channels, as well as sudden siltation caused by typhoons

    大量實測資料驗證表明，該數學模型可以較好地模擬長江口地區的潮位、流速、流向、含沙量、底沙、分流比、南北槽地形變化和臺風暴潮造成的航道驟淤情況。
  12. The theory of minimum entropy production or minimum rate of energy dissipation shows that a river is stable when it is in a relative equilibrium condition. ( 3 ) the river facies formulas of alluvial river have been developed using the theory of minimum rate of energy dissipation together with flow continuity and motion equations, suspended load transport or bed load transport equation. ( 4 ) the causes of the river patterns are explained using the theory of minimum rate of energy dissipation

    （ 3 ）基於最小能耗率原理，以水流能耗率作為目標函數，以水流連續方程、水流運動方程及懸移質挾沙力公式或推移質輸沙率公式作為約束條件，通過對目標函數求條件極值，分別推導出以懸移質造床為主的顯式河相關系式和以推移質造床為主的顯式河相關系式。
  13. However, according to ann ' s theory, making use of visual basic development tool, friendly - interface single output three layers " artificial neural network generator base on improved bp algorithm has been developed by the author, and after constructing the model, the value of d _ ( cmax ), finally the gross bed - load transport rate of non - uniform sediment with a wide distribution in flume experiment of stead sediment transportation have been forecasted

    筆者採用的途徑則是根據人工神經網路理論，利用vb開發出界面友好、基於改進bp演算法的多輸入單輸出三層神經網路生成器軟體，並採用該生成器建模，對平衡輸沙狀態下的水槽輸沙試驗的d _ （ cmax ）和總輸沙率進行預測計算。
  14. The results show that ( 1 ) the system of contour dams, contours and fallow had positive impact on water and soil losses than grass stripes and contour ditch. at the same time it was showed that contour dams, contours, fallow significantly reduced soil erosion and water loss, grass stripe and contour ditch had recorded reduction in water and soil losses although to a much less extent than above 3 farming systems. most of sediment was bed load in all the systems except in contour dams and contour fanning

    研究的主要結論如下： 1 、運用坡面徑流小區法系統地研究了當地農業生產活動中不同農作措施下紅壤坡耕地水土流失特徵、土壤養分流失規律及形態特徵，結果表明： （ 1 ）同順坡農作措施相比：其它農作措施均具有明顯減輕水土流失的作用，等高土埂，等高農作、休閑處理控制水土流失的效果優於水平草帶和水平溝處理。
  15. Bed - load channel fill

    底荷河道沉積
  16. Based on the topographic features and data of sediment particle size of bed load at the fluctuating backwater reach of liujiaxia reservoir, the streamwise variation and variation process of median diameter of bed load during silting and scouring periods of the fluctuating backwater reach are analyzed, and it can be seen that the turning point for the sediment diameter variation from coarse to fine is located at the outlet of shigou gorge of the fluctuating backwater reach

    摘要根據劉家峽水庫變動回水區的河段地形特徵和歷年河床質泥沙粒徑級配資料，分析了變動回水區河段淤積和沖刷時，河床質泥沙中值粒徑的沿程變化和歷年河床質泥沙中值粒徑變化過程，並指出粒徑分佈由粗變細的轉折點在變動回水區寺溝峽峽口處。
  17. The additional resistance caused by sediment transport of bed - load and suspended load is derived from mean energy equation of sediment - laden flow, and the variation of resistance in sediment - laden flow is discussed

    從挾沙水流的平均能量方程出發，得到了推移質附加阻力的計算公式及懸移質附加阻力計算公式，並對挾沙水流的阻力進行了討論。
  18. The application study of improved bp algorithm in sediment science - using two set of experiment data mentioned above, the value of d _ ( cmax ) and gross bed - load transport rate in non - uniform sediment with a wide distribution in flume experiment of stead sediment transportation have been forecasted by ann generator

    改進bp演算法在泥沙科學中的應用研究?將收集整理后的兩次水槽試驗實測資料作為數據來源，利用生成器生成網路對水槽平衡輸沙試驗中的最大起動粒徑和總輸沙率進行預測。
  19. Abstract : variations of flow pattern, flow velocity in deep poo l and side bar, mainstream thread, and water surface, caused by excavation project, are investigated by two - dimensional mathematical model in an orthogonal curvili near coordinate system. the change of bed - load transport rate, and redeposition r ate are predicted. the influences of the excavation project on navigation are ana lyzed. grid - type and flat - type excavation alternatives are proposed and discuss ed

    文摘:採用正交曲線坐標系下的河道平面二維數學模型，研究了嘉陵江何家磧邊灘采砂后河道流勢、流態、灘槽流速、主流位置、水面高程及比降的變化規律，預測了采砂方案完成後卵石推移質輸沙率變化及其對航道的影響，並對格形開挖和平整開挖方案進行了比較分析
  20. According to the theories of the energy dissipation of wave - water and sediment movement and based on the bottom sediment load formula developed by dou guoren, a formula to calculate the transport of the bottom sediment, which includes the bed load and part of suspended load, under the joint action of waves, tidal currents and wind - currents is derived

    摘要根據波動水流能量及泥沙運動原理，參考了竇國仁推導底沙輸沙量的方法，推導出波浪、潮流和風吹流共同作用下的底沙輸沙量（包括推移質和部分懸移質輸沙）計算式。
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