stream sediment 中文意思是什麼

stream sediment 解釋
河流沉積
  • stream : n 1 河流，小河；川，溪。2 流出，流注；一連串，（人物等的）輩出。3 （事件等的）連續；（財富等的）...
  • sediment : n. 1. 沉澱（物）；沉渣。2. 【地質學；地理學】沉積物。
  1. The deposition of sediment in our natural stream channels has greatly aggravated floodwater damages.

    泥沙淤積在天然河道，已大大加劇了洪水的危害。
  2. By performing fourier transformation, the relationship between the turbulent intensity of the particle and that of the carrier fluid was obtained which makes clear that particle size, specific gravity, velocity gradient, and the characteristic frequency of energy - containing eddies are four basic influencing parameters. it is proven theoretically that under certain conditions, the stream - wise and transverse particle turbulent intensities exceed those of the carrier fluid. based on the equations of two - phase flow, the presence of fine sediment suspension is shown to attenuate the turbulent intensity of the water

    通過對細小顆粒在剪切流場中運動方程的fourier分析，得到了顆粒脈動強度和流體脈動強度之間的定量關系，表明顆粒粒徑、顆粒密度、流速梯度以及紊動場含能旋渦的特徵頻率是影響顆粒脈動強度的主要因素，首次從理論上證明了在一定條件下，顆粒在縱、垂向的脈動強度均會超過相應的流體脈動強度，為已有的實測資料提供了合理的解釋。
  3. Based on an analysis of dynamic conditions for migration and precipitation of gold grains in water system and their diffusion in soil, this paper has advanced a discriminant formula for surfacce ore potential of gold anomalies from 1 : 50000 stream sediment survey, recounted methods for estimating the highest gold grade ores within the anomalies, calculated the discriminant indices for qinba area, and summed up index characteristics of ore - induced gold anomalies in 1 : 10000 soil survey, estimation formulae for orebody location as well as coefficients and constants of slope angles of various orders and grades

    摘要在分析金粒在水系中運移、落淤和在土壤中擴散動力條件的基礎上，本文建立了五萬分之一水系沉積物測量金異常地表含礦性的判別公式，闡述了推算異常內礦石最高金品位的方法並計算了秦巴地區的判別指數；總結出萬分之一土壤測量礦致金異常的標志特徵、礦體定位的估算公式及各級次地形坡度角的系數和常數。
  4. Heavy metal pollution of stream sediment in panzhihua area

    攀枝花地區河流沉積物的重金屬污染研究
  5. Based on geochemical technical tests conducted in the yanzidong ore block, western yunnan, the authors used the hydrochemical survey as the grade 3 inspection method for high canyon target areas, and rearranged the methods for routine stream sediment survey and soil survey

    摘要根據在滇西燕子洞礦段的化探方法技術試驗研究結果，將水化學測量作為高山峽谷區靶區三級查證的方法，並對常規水系沉積物測量、土壤測量的工作方法進行了調整。
  6. Analysis on several factors influencing the erosion environment in coarse and sediment concentrated regions in yellow river ' s middle stream

    黃河中游多沙粗沙區侵蝕環境若干要素分析
  7. The dostrobiton of metals in stream sediment in different tectonic zones, eastem china

    水系沉積物中的金屬元素在中國東部不同構造單元的分佈特徵
  8. Hydroelectric power exploitation can reduce sediment disposal, lengthen life of power plants in lower stream, control stream, better water quality, and reduce contamination etc. considering the structure of power of sichuan province and pointing out its six problems in power development, this thesis comes up with sustainale development strategy of sichuan hydroelectric power exploitation, that is, prefentially exploit large scale hydropower plant which has good water - adapting capability, comprehensively use water resource, try to reduce cost caused by drowning, stimulate rotating exploitation, well deal with settlement of people in hydroproject construction, and alleviate contamination

    論述水電開發在減緩泥沙淤積、延長下游水電站壽命、調控水流、提高供水量、改善水質、提供清潔能源、減少環境污染等方面對長江上游生態屏障建設的作用。本文研究分析了四川水電開發的可持續發展戰略，首先對四川省電力結構現狀進行了分析，指出目前四川電力發展存在的六個主要問題，從優先開發具有良好調節性能的大型水電站、綜合利用好水資源，盡最大可能減少水庫淹沒損失，積極推進流域梯級滾動綜合開發，處理好水庫移民關系，減輕對環境的不利影響等六個方面論述了水電開發的可持續發展戰略。
  9. The results indicated that with the change of water and sand condition and the altitude of tongguan and the development of the industry and agriculture in recent decades, the water environment of wei river had changed largely, which were shown as follow : annual runoff and seasonal flood decreased sharply ; water stream of large discharge decreased and the range of runoff decreased greatly ; sediment load per year decreased generally, sediment concentration of water increased, and the sand silting up was serious ; water channel swung and shrank, and water regime deteriorated ; frequencies of big floods decreased obviously, and hyper concentrated flood increased obviously ; water levels of the same runoff rose universally, and the frequencies of the floods increased and aggravated ; water pollution was very serious

    結果表明，近期隨著水沙條件、潼關高程等的變化及工農業的發展，渭河的水環境發生了巨大變化，表現在年水量及汛期水量銳減；大流量級水流出現次數減少，水量減少幅度大；年輸沙量總體減少，河水含沙量增大，泥沙淤積嚴重；河道向擺動型發展，河道萎縮，河勢惡化；大洪水發生的次數顯著減少，高含沙小洪水明顯增多；同流量洪水位普遍抬高，洪災發生次數增加，洪災加重；水質污染極為嚴重。
  10. Abstract : the effective shear stress of sediment transport is analyzed theoretically and tested by experimental data. the result shows that the effective shear stress is neither the overall shear stress nor the sand grain shear stress, but the geometric mean of these two stresses. the effective shear stress not only generalizes the flow intensity but also summarizes the flow intensities of mean flow velocity, stream power and unit stream power

    文摘:本文通過理論分析及實測資料檢驗表明，無論對於何種泥沙運動狀態，決定泥沙運動的有效切應力既不是沙粒切應力又不是全部切應力，而是介於兩者之間，近似為沙粒切應力與全部切應力的幾何平均值.這一有效切應力不但是對切應力類水流強度指標的總結，還可以概括平均流速和水流功率等水流強度指標
  11. Complicated hydrologic and geographic conditions, and the large scale of the xiaolangdi hydraulic project on the yellow river are introduced briefly. three desilting tunnels are designed to meet the requirements of flood control, sediment discharge and runoff regulation. according to the performance requirements of desilting tunnels, the tunnel lining down - stream of the grouting curtain is designed to be post - tensional prestressed lining. on the basis of investigation and research, experiements and analysis, the unbonded prestressing system is used. it is the largest unbonded prestressed tunnel lining project in the world, and the first one in china

    簡介黃河小浪底水利樞紐復雜的水文、地質條件以及龐大的工程規模.該樞紐設計有3條排沙洞，擔負著泄洪、排沙、調節徑流和保證進水口不被泥沙淤堵的任務.根據排沙洞的水庫運用要求，灌漿帷幕下游排沙洞洞身段設計為混凝土后張預應力隧洞.通過大量的調研、試驗、分析論證，在施工前確定該預應力方案選用無粘結預應力系統，成為目前世界上規模最大的無粘結預應力隧洞襯砌工程，在國內尚屬首例
  12. The geochemical features of the stream sediment in forest sweeap landscape district in daxinganling

    大興安嶺森林沼澤景觀區水系沉積物的地球化學特徵
  13. A comparison of the result from stream sediment survey with that from grid soil survey or chipping rock survey indicates that in the forest and swamp landscape of da hinggan mountains, the tradition stream survey should be replaced by the new grid soil survey or chipping rock survey in the 1 : 50, 000 follow - up for regional geochemical anomalies

    摘要通過對水系的不同介質測量與網格法土壤、巖屑測量結果的研究，提出在大興安嶺森林沼澤區異常查證中，應採用網格法土壤或巖屑測量替代傳統的五分之一萬水系沉積物測量方法。
  14. Our site inspection near shek mum kap at the midstream section of the tung chung stream on 14 august 2006 revealed significant sediment runoff from upstream water. virtually no fish and insects were observed in the stream

    本會於2006年8月14日在鄰近東涌河中游段的石門甲進行實地考察時，發現大量沉積物從上游沖刷而下，本會職員更幾乎未能在該河段中找到魚類和昆蟲。
  15. Application of robust estimation methods to anomaly appraisal of stream sediment survey in xinhure area, inner mongolia

    穩健估計方法在內蒙古新忽熱地區水系沉積物測量異常評價中的應用
  16. The measured data show that the bedload sediment transport rate is related more closely to the effective stream power within the bed - surface layer than to the river stream power

    實測資料表明，推移質輸沙率與床面層內有效水流功率有良好的相關性，且高於推移質輸沙率與水流功率的相關性。
  17. Factor analysis method and application of stream sediment geochemical partition

    水系沉積物地球化學分區的因子分析方法與應用
  18. Anomalous stream sediment

    異常水系沉積物
  19. First we adopt stream sediment sampling to circle au anomaly then carry out soil geochemistry survey to reduce target area, finally geological prospect to locate gold ore bodies

    先採用水系沉積物測量圈出異常，然後進行土壤（巖石）測量縮小靶區，最後進行地質普查，發現金礦（化）體。
  20. Application of gps in stream sediment survey of

    5萬水系沉積物測量中的應用
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