河流坡降 的英文怎麼說
中文拼音 [héliúpōjiàng]
河流坡降
英文
gradient of river-
Based on studying of the unequal rainfall in space - time and the asymmetry physical geography parameters in space, which can influence the process of the runoff, this paper puts forward a sort of slope conflux and watercourse conflux simulating model based on grid, and that gains flux at random time and grid in basin
本模型針對降雨時空分佈不均勻與下墊面自然地理參數空間分佈不均勻，對產匯流形成過程的影響，提出了一種基於柵格的坡面產匯流與河道匯流的數值模擬模型。Besides, the sedimentary facies of upper ganchaigou and lower ganchaigou formation were also mapped in supersequences which are the main target strata for exploration. the high resolution sequence stratigraphic framework showed the genetic relationship between the distributions of sedimentary facies and their tectonic settings. the near - source sedimentary systems such as subaqueous alluvial fan and lake - floor fan are often deposed in rise - hemicycles in the steep slope background in the north, the coarse lithology of fan - delta prograded from north to south in fall - hemicycles, and the braided stream facies are formed in the rise - hemicycles in gentle slope background in the south, braided stream facies prograded from sorth to north in the fall - hemicycles, but the lacustrine facies and salt lake facies developed in the middle part of the area
詳細的沉積相研究發現，紅獅地區第三系發育有沖積扇、水下沖積扇、河流、三角洲、扇三角洲、湖泊和湖底扇7種主要沉積相類型，並對作為區內主要勘探目的層系的下乾柴溝組和上乾柴溝組進行了以超層序為單位的沉積相平面編圖，以較高的時間解析度揭示了區內沉積相帶的平面展布及其在不同構造背景中的分佈規律，比如在北部的凹陷陡坡背景下，上升半旋迴低水位期通常發育有水下扇、湖底扇等陡岸近源特徵的沉積體系，下降半旋迴高水位期，扇三角洲相粗碎屑巖由北向南進積;在南部的凹陷緩坡背景下，上升半旋迴主要發育辮狀河流相，下降半旋迴辮狀河三角洲相由南向北進積;而中部紅柳泉一獅子溝一帶則為湖泊相沉積和鹽類沉積。When catchment area, average channel gradient and catchment shape factor of designed culvert or bridge are known, a user can be convenient to get local parameters c, e and b from standard contour charts and easy to calculate flood flow just by a calculator. design period of flood flow is enormously shortened as well as a high precision. estimated flood flow through culvert or small bridge by new calculation model is generally less than by traditional methods, so that much cost is cut down a s reducing the span of culvert or small bridge
以75000km ~ 2的川中丘陵地區為試點研究區，繪制了該地區新模型的參數等值線圖，率定了不同設計頻率的改正系數，使設計者只需在地形圖上獲取集水面積，河道平均坡降和流域形狀系數，在參數等值線圖上查得橋涵所在地的相應參數，使用計算器即可迅速計算出設計流量，大大縮短了設計周期，且精度較高，設計的洪水流量一般低於傳統方法，從而可減小橋涵跨徑，節省投資。Could there exist another possibility for the south boundary of the system as follow : the rainfall infiltrates in the outcrop carbonate - mountain area of western, and moves towards south and deeper along carbonate rocks, then moves upper through the overlain tertiary system ( n ) with a thickness of 400m ( instead of running off to the springs and yellow river through a long approach of least hydraulic gradient ), and then mainly transforms into the horizontal drainage in the loess layer of quaternary, finally drains in lu - botan depres sion
並且提出，關于對系統南界的認識，是否存在另一可能：即在西部碳酸鹽巖裸露區大氣降水入滲后，沿碳酸鹽巖向南向深部運動，然後，並非在極小的水力坡度驅動下長距離地向東部黃河、泉群徑流排泄，而是通過上覆厚度約400m的第三系向上運動，繼而主要在第四系黃土層中轉為向南水平排泄到鹵泊灘。Generally the rainfall on steeplands may be no more erosive than that on nearby lowlands, the resulting runoff and eroded sediments will move much more quickly on steep slopes, and will provoke more severe rill and gully erosion ( source : fao soils bulletin 75 )
通常坡地的降雨侵蝕比附近的低地更嚴重，這樣坡地的流失物和侵蝕的沉積物移動更快，引起河流侵蝕。( 5 ) conclusion was obtained by the analyzing and studying the mechanics environment of the rock mass and the landslide on right bank : according to the analysis, the present direction of the maximal principle stress was consistent with the present tectonic stress field, the value of the principle stress increased or reduced in special place, and there was tensile stress region at the 2000m or above it on the left bank, the accumulate and adjustment was very limited in 200 years, the calculated result of the landslide indicated that the landslide on the right bank was stable under the various conditions
（ 5 ）壩址區河谷巖體力學環境及右岸古滑坡體的穩定問題分析得出：河谷巖體應力場的分析顯示，河谷巖體中主應力的方向基本上與現今區域構造應力場的方向一致，在一些特殊地帶巖體的主應力值有所降低或增高，特別是在左岸的2000m高程附近及以上，存在有明顯張應力區。在未來200年流變計算時步范圍內，河谷巖體應力的積累與調整較為有限。同時對滑坡體各種工況條件下的穩定性計算結果表明，右岸古滑坡體在各種工況條件下是處于穩定狀態的。It is suggested that the distribution of the depositional systems and the depositional facies have the clear characteristic that in the north of the research area, the alluvial fan sediment, the fluvial system and the delta system are the main styles of the depositional system, towards to the direction of basin the lacustrine, the barrier, the carbonate ramp system become the main depositional systems
受海平面升降變化控制，區內沉積體系和沉積相的分佈具有明顯的分帶性，北部靠近源區以沖積扇或河流及三角洲沉積為主，向盆地方向以湖泊或海岸障壁-瀉湖、碳酸鹽緩坡沉積為主。中二疊世北部源區發生構造抬升，當時古氣候逐漸乾燥，成煤環境結束，沉積物以陸相河流、湖泊三角洲占優勢。It is suggested in this paper that the sediment of the high stand system tract is mainly composed of fine - grained sediment, hardly of the large scale of fluvial - delta because of the low dip of the ramp, low subsiding rate and low sedimentary rate in basin
研究表明，盆地基底沉降幅度小、坡度極為平緩、沉積速率很低，因此導致層序內的高位體系域多以細碎屑沉積為主，大型河流三角洲沉積基本不發育。分享友人