石油地质专业英语翻译，急急，感谢好心人帮忙翻译.....
The delta is comprised of a diverse complex of depositional environments that span a wide range from terrestrial through coastal to purely marine. The processes and resulting morphology of a delta are the result of a great variety of interdependent factors. Although there is a considerable range in the specific characteristics among the world’s deltas, they also share some general features and processes that are universal regardless of size or location of the deltaic system.
Deltas can typically be subdivided into three broad environments: the delta plain, which is largely subaerial but contains subaqueous portions, the delta front, and the prodelta. There is a general seaward fining of sediment particle size within the latter two regions of the delta. The distal portion of the delta(prodelta) is dominated by clays settling from suspension.
Whereas one commonly thinks of deltas in terms of large accumulations of sediment and as constructional systems, there is typically a destructional phase as well, erosion may actually dominate at some areas or during certain periods of time when little sediment is being supplied. Waves and currents, both wave generated and tidal, are the primary agents of erosion on the delta. The destructive phase dominates on abandoned portions of delta when sediment influx from the river has ceased. The active delta is dominated by the constructional phase. Beaches, beach ridges, and dunes may develop along the shore of the abandoned delta, whereas the active delta exhibits progradation of the deltaic plain, which greatest rates concentrated at the major distributaries.
三角洲通常可再分成三个环境：三角洲平原，有水域的大片陆地；三角洲前沿，以及前三角洲。在后两个地区的某个临海位置沉淀粒径变小。三角洲的末梢部分（即前三角洲）由沉淀的粘土形成。
然而，一种关于三角洲沉淀的大量沉积和构造机制的普遍见解认为也有一个破坏相，在这一阶段侵蚀作用可能在某些区域或者至少在主要是小颗粒沉积的阶段起主导作用。受潮汐影响产生的海浪和海流是三角洲侵蚀作用的主要营力。当河流的沉积物供应停止时破坏相在无约束的区域起主导作用。活跃的三角洲受构造相主导。海滩、滩脊和沙丘可能沿着三角洲无约束的区域形成，然而活跃的三角洲显示出主要集中在主要支流的三角洲平原的延伸。
伊洛瓦底江三角洲是由不同的沉积环境的复杂,范围很广,从陆地通过纯粹的陆战队员。沿海这个过程,并导致的三角洲的各式各样的相互依存的因素。虽然有一个相当大的范围内的特殊性,在世界范围内的增量,他们也可以分享一些一般性的特点和工艺,无论大小、位置的普遍的三角洲系统。
增量可以被继续分为三个主要典型环境:三角洲平原,这主要是地表的却含有水下部分,前三角洲亚环境,。有一种通用的泥沙粒径蔼净化剂的伊洛瓦底江三角洲的两个地区。远端部分的三角洲亚环境)就是由黏土沉降停赛。
人们普遍认为,而其它大型的沉积物沉积条件,如建筑系统,是一个典型的破坏性阶段,实际上可能会侵蚀占据在一些地区或在一定历史时期的小沙能力很重要。浪、流、两波和潮汐,主要代理的侵蚀在伊洛瓦底江三角洲。在废弃的破坏性的相位主导的三角洲沉积从河里流入时停止。主动三角洲主导下的施工阶段。沙滩、沙滩山脊,沿着海岸沙丘可能罹患遗弃的三角洲,而活跃的三角洲的三角洲平原兰科维奇展品,主要集中在主要的支流。
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