Moreover, human activities play a more and more important role in the development of tidal flat. The concentrated coastal engineering change the dynamic environment of the tidal flat, and the exploitation of oil, natural gas and groundwater results in surface subsidence in the coastal area. In addition, sea level rise and the accompanied increase of storm surge frequency and intensity, will strengthen the erosional process, reduce the tidal flat area, coarsen the sediment, made the slope steep, and cause other environmental effects.

人類活動的環(huán)境效應對渤海潮灘發(fā)育的作用越來越明顯一级黄手机免费在线视频，環(huán)渤海地區(qū)密集的海岸工程將改變原始的潮灘動力環(huán)境中文字幕第4页；石油一级看片免费视频精品、天然氣人人摸人人操人人人爱、地下水的開采會導致海岸帶發(fā)生地面沉降一级特黄毛片视频播放一区二区；海平面上升以及與其相伴隨的風暴潮作用頻率與強度的增加都將會使渤海潮灘的侵蝕過程加強欧美精品在线一区、潮灘面積縮小、灘面物質粗化免费h在线观看视频网站、坡度變陡在线观看免费麻豆AV，并產(chǎn)生一系列的相關的環(huán)境效應。

Cumulate plagioclase appears abruptly at the base of the F unit, which rests on an erosional disconformity.

堆積的斜長石在位于侵蝕假整合之上的F單元的基底突然出現(xiàn)日日插人人操天天拍。

Cumulate plagioclase appears abruptly at the base of the F unit, which rests on an erosional disconformity

堆積的斜長花崗石在位于侵蝕假整合之上的F單元的基底突然出現(xiàn)激情综合婷婷丁香五月。

The four types of sequence interfaces embody ten types, such as paleocrust of weathering, drossy layer, river rejuvenation, palaeokarstification surface, scouring and erosional surface of slope gravity flow, erosional surface of basin turbidity current, volcanism surface, transfer surface of lithologic characters or lithofacies, onlap surface and maximum flooding surface.

以此為基礎，將右江盆地泥盆系—中三疊統(tǒng)劃分為6個二級層序和49個二級層序91影视18以下禁在线观看。

A schematic model was proposed to illustrate the occurrences of various lithologies and lithofacies associations. The erosional surfaces on siliciclastic mudstones, funnel-shaped structure, and the exhuming of massive cold-seep carbonates exposed might have been occurred concurrently during a tectonic unstable time in SW Taiwan. The deposition of fossiliferous mudstone interfingered with the conglomerate lithofacies, and represented the rapid facies transition from siliciclastic (non-carbonate) into carbonate environment.

綜合巖相觀察結果成网站免费在线观看，建構一個符合臺灣西南部更新世珊瑚礁與基底泥巖接觸關系的沉積相模式；其中久久毛片网站，基底泥巖頂部的不規(guī)則沖蝕面欧美日韩国产风俗、充填碳酸鹽膠結泥巖礫與碳酸巖煙柱的漏斗狀沉積，以及塊狀冷泉碳酸鹽巖的出露乱伦小说网尤物视频亚洲，可能均為區(qū)域地質構造活動時期所造成国产一区清纯美女在线观看；至於與含化石泥巖同時沉積的礫巖相，可能均為基底泥巖在快速淺化的過程中所沉積二久久黄片，標志古環(huán)境由矽質碎屑快速轉變?yōu)樘妓猁}環(huán)境的過程老人黄色视频。

The landform of this area is a thpyical erosional and depositional topography of semiarid one.

這個地區(qū)是一種典型的半干旱地區(qū)的腐蝕和沉積地形。

Based on the National '973' Project, National Physical Science Fund and, Science and Technology Project of Shanghai, this paper studies the complexity of erosional/accretionary evolution in the Yangtse Estuary.

另一方面未满十八18禁止网站，長江口及其鄰近區(qū)域又是我國重要的經(jīng)濟活動區(qū)之一凹凸在线导航AV网站。

The relationship be-tween the erosional soil surface and the erosional soil modulus is nonlin-er,but a power relation,that is:M=

建立了土壤侵蝕面與區(qū)域侵蝕模數(shù)間的回歸模型，M=

Following the rising and dropping of sea level, river erosional base have been changed severely, while there are some erosional or siltational processes happened in vertical direction at river mouth and in its low reach, there are also with large scale migration in plain direction.

隨海面升降變化，河流侵蝕基準面發(fā)生重大變化日韩操B，河流河口與下游段在發(fā)生侵蝕—淤積垂向變化的過程中v免费黄色视频，平面上亦表現(xiàn)為大范圍的遷移。

The second part of the dissertation comprehensively analyses geological background and erosional geomorphological conditions in the test regions, elaborates on evolution characteristics of erosional environment in the regions, probes regional distinguishing regularity of erosional geomorphological patterns as well as their developing and evoluting features in loess fields, and places emphasis on discussing developing and evoluting trends of soil erosion in the watershed.

本文的后半部分對試驗區(qū)的地質背景與侵蝕地貌條件進行了綜合分析人人漂人人操，闡述了區(qū)域侵蝕環(huán)境的演化特征国内机关自拍视频在线观看，探討了黃土地區(qū)侵蝕地貌區(qū)域分異規(guī)律及其發(fā)展演化特征，并著重討論了流域土壤侵蝕的發(fā)展演化趨勢又大又长的黄色视频。