coarse sediment 中文意思是什麼
coarse sediment
解釋
粗粒沉積物-
The field observation of the sediments of storm surge produced by no. 11 typhoon in 1997 shows that sedimentation rate of storm surge sediments are greater than that of normal astronomical tide sediments, and the grain size shows relative coarse with poor sorting. vertical sequences of the storm sediment show parallel bedding and overlapped by hummock bedding. these characteristics provide good basis for building the index of storm surge deposit
通過對梁垛河閘9711號臺風的現場觀測並結合目前已有的風暴潮沉積的研究，分析了風暴潮沉積在構造和結構上的特點，從而建立了正常潮灘沉積中風暴潮沉積的識別標志，同時在野外觀測中還發現即使在風暴潮期間，高潮灘上部仍存在只有淤積沒有侵蝕的地帶。 -
Although the patterns of residual currents are likely to reflect the patterns of fine - grained sediment transport, it is difficult to relate such patterns to the transport of coarse - grained sediment
然而余流的趨勢雖有可能反映細顆粒沉積物輸運的最大概率方向，卻難以與粗顆粒沉積物的輸運對應起來。 -
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。 -
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 -
The paper analyzes and summarizes the following laws of distinctive sediment yield produced in storm floods of the region based on predecessors ' study : storm is the main dynamic force of erosive sediment yield and storm, flood and sediment exist an inevitable relation ; the flood occurring time is concentrated with high peaks and huge volume, suddenly rising and suddenly falling and has decisive influence to the formation of a major flood peak in the middle yellow river ; the main reasons of concentrated coarse sediment of the river is severe erosive sediment yield, strong sediment transporting capacity and high sediment concentration ; the important influence of frequent or continued storm floods happened in he - long reach especially in coarse sediment concentrated region to the sediment transport of the yellow river and ; along with the increase of harnessing, regional flood trend is becoming smaller but the variation of sediment quantity is not obvious and the reaction of peak discharge and flood runoff of majority tributaries are not sensitive, showing that a general and normal engineering works can not effectively control regional major floods especially the sediment of an extraordinary flood
摘要在前人研究的基礎上分析總結了該區特有的暴雨洪水產沙規律：暴雨是侵蝕產沙的主要動力，暴雨、洪水、泥沙之間存在著必然的關系；洪水發生時間集中，峰高量大，暴漲暴落，對黃河中游大洪峰的形成具有決定性影響；侵蝕產沙強烈而粗泥沙集中，輸沙能力強，洪水含沙量高，是黃河粗泥沙的集中來源地；河龍區間特別是粗泥沙集中來源區頻繁或連續的暴雨洪水對黃河輸沙有重要影響；隨著治理水平的提高，區域洪水有減小趨勢，但泥沙量變化不明顯，大部分支流的洪峰流量、洪水含水量反應不敏感，說明一般規模和水平的治理工程還不能有效控制區域大洪水特別是特大洪水的泥沙。 -
Understanding on building large - scale debris - retaining reservoirs in sediment concentrated and coarse sand area on the middle yellow river
對在黃河中游多沙粗沙區修建大型攔泥庫的認識 -
Real - time surface velocity field measurement system and three - dimensional particle velocity measurement system are developed. systematic experimental research on the movement of coarse sediment particles in open - channel flows was carried out using developed system
本文研製開發了表面流場實時測量系統和顆粒三維運動測量系統，並採用顆粒三維運動測量系統對明槽水流中粗顆粒的運動進行了系統的試驗研究。 -
Analysis on silt - discharge distribution and variation character of sediment - laden and coarse sand producing region in the middle yellow river
黃河中游多沙粗沙區水沙分佈及變化特徵分析 -
It puts forward to differentiate the coarse and fine sand and then measure the sediment yield of total precipitation erosion by using the combined method of drying and pycnometer in the light of the soil mixed with large quantity of coarser sand in the model tests
針對模型土壤中夾雜著大量粒徑較粗的泥沙顆粒的試驗，提出進行泥沙粗細分層，然後採用烘乾法和密度瓶法相結合的方法來測量次降雨侵蝕產沙量。
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