scour the area 中文意思是什麼
scour the area
解釋
徹底搜索這個地區-
Study achievement appears as following aspects : ( 1 ) yellow river estuary gate river flow and tide flow mixed area is not keep standing deposition status, on special income water and sediment conditions, boundary conditions and oceanic power conditions, this area may on the scour status ; ( 2 ) observed from estuary sediment deposition distributing process : delta and sea offing area sediment deposition vary trend is similar, each part sediment deposition scale varies as wave shape ; ( 3 ) on estuary gate, affect the sediment deposition factors, primary factors are tide prop, the gate widens gradually, estuary gate have branches, brine induced flocculation. this paper study the estuary gate widen, estuary gate have branches to affect the river channel deposition in quantity ; ( 4 ) based on field measured data, for the first time, deduce the estuary sediment deposition and distributing regress formula which can estimate estuary different areas sediment deposition volume ; ( 5 ) this subject demonstrate the estuary delta coastline dynamic balance conception, build the relationship between the estuary income sediment with deposition land area, draw the following important conclusion : when estuary years - averaged income sediment keeps at 345 million tons, the delta coastline may on the dynamic balance status. ( 6 ) this subject firstly brings up estuary sediment optimized control conception, and has the primary study on the macroscopically optimized control conception method
研究認為： （ 1 ）黃河河口口門逕流潮汐區域並非持續保持淤積狀態，在特定的來水來沙、邊界條件和海洋動力條件下，該區域可以處于沖刷狀態； （ 2 ）從河口泥沙沉積分配的過程來看：三角洲與濱海區泥沙的沉積變化趨勢是基本一致的，各部位的泥沙沉積比例變化基本呈波動狀態，且三角洲與濱海區泥沙的沉積比例與來沙量密切相關，基本成正比關系； （ 3 ）在口門處，影響泥沙沉淤的因素主要集中在潮汐頂托、口門逐漸加寬、河口門分汊、鹽水造成絮凝等，本報告主要對口門加寬，口門西妥理工大學工程碩士專業學位論文分漢對河道淤積的影響進行了定量分析: （一扣根據實測資料首次建立了河贖流路泥沙沉積分配的回歸計算式，據此可以預估計算河口不同區域泥沙的沉淤量; 、 5 ）本項研究首次論證了河口三角洲岸線動態平衡的概念，並建立了黃河河口來沙量與造陸面積的相關關系，得出了當河口多年平均來沙量維持在3 . 45億t時其河口三角洲岸線則可能處于動態平衡狀態的重要結論; 『 6 ）本項研究首次提出了河口泥沙優化調控的概念，並對其宏觀優化調控模式進行了初步探討。 -
Test and study on the influence of operational water level of sanmenxia reservoir to scour and fill of the reservoir area
三門峽水庫運用水位對庫區沖淤影響試驗研究 -
It has conducted physical model tests on five plans of different operational modes of sanmenxia reservoir and different combination of sediment discharge conditions and analyzes the influence of different sediment discharge conditions and different operational modes to scour and fill of reservoir area
摘要通過實體模型對三門峽水庫不同運用水位和水沙條件組合的5組方案進行了試驗，對比分析了不同水沙條件和不同運用水位對庫區沖淤的影響。 -
The results show that reducing the water level of dam front can regulate the location of scour and fill of reservoir area and be advantageous to scouring of reservoir area, reducing the elevation of tongguan, especially to the scour of channel in reservoir region and the elevation reduction of tongguan under the favorable conditions of sediment discharge
試驗結果表明，降低壩前水位可以調整庫區淤積部位，有利於庫區的沖刷和降低潼關高程，但有利的水沙條件對庫區河道的沖刷和降低潼關高程更明顯。 -
Silt will deposit there. velocities around groin head are larger than the scour velocity and scour hole may develop in this area. this would affect the stability of spur dikes
受丁壩阻擋，壩田所在的邊灘區域流速很小，泥沙在此淤積:而壩頭附近流速較大，通常在此區域形成沖刷，影響丁壩的穩定性。 -
On the basis of on - the - spot investigation and information, this article puts forward the stratum separation scheme and field criterion for projects in gansu loess areas ; presents the geological structure model of the natural slope in this area for the first time ; counts and analyses the parameter of the loess ; analyses the stability of loess cut with the method of ultimate balance and finite element ; recommends different transect forms for the cut subgrade in gansu ' s loess areas ; evaluates these forms with grey system theory concerning stability, economy and anti - scour capability ; finally, puts forward the design method and procedures of reasonable heavy cuts transect
本文通過大量的現場調查和資料收集，提出了甘肅省黃土工程地層劃分方案和野外判定標準；首次提出了甘肅省黃土自然邊坡的不同地質結構模型；統計和分析了甘肅省黃土的土性參數；運用極限平衡法和有限元法對黃土路塹高邊坡穩定性進行了分析；推薦了甘肅省不同黃土地區路塹高邊坡的斷面形式，並結合穩定性、經濟性和抗沖刷性能，應用灰色系統理論對其進行評價；最後，提出了黃土路塹高邊坡合理斷面設計方法和設計步驟。 -
Abstract : an experimental investigation of local scour around a new type bridge pier under a clear water regime is presented. the main characteristic feature of flow is relatively large horseshoe vortex flow along the circumference of the pier. and the procession of scour is discussed in this paper. equation for predicting the depth and area of local scour hole is presented. it is significant for evaluating the potential for scour around this type pier
文摘:介紹了一種新型橋墩即多腹薄壁墩的局部沖刷試驗成果.認為橋墩周圍的水流以繞流橋墩的相對較強的馬蹄型漩渦系為主要特徵.並討論了沖刷過程，給出了預測沖坑深度及大小的關系式，可供估算同類型橋墩的沖刷參考 -
The development of sedimentary environment of yanchang formation be analyzed and discussed further. based on the analyses of all kinds of sedimentary deposit. under the direction of the theory and methods of sequence stratigraphy, 4 type i sequence boundary could be recognized in the study area, according to the marked bed including plane of deflation, scour, the plane of lithological salutation, structural transformation, down cutting channel sheet sand and so on. type i sequence consists of low stand systems tract, transgressive systems tract and high stand systems tract
本文採用當代層序地層學理論和方法，利用風化剝蝕、沖刷面、巖性巖相突變、結構轉換面、構造機制轉換面等層序界面的識別標志，將研究區延長組劃分為四個層序，其層序界面都為型層序界面，具有三元體系域結構特徵，由低水位體系域、水進體系域和高水位體系域三個部分組成。
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