急求专业英语翻译!手工的!Modeling the hydraulic effect of transverse deep zoneson the performance of short-circuiting constructedtreatment wetlandsShort-circuiting, which occurs when a large fraction of water traveling through a systemexits

急求专业英语翻译!手工的!Modeling the hydraulic effect of transverse deep zoneson the performance of short-circuiting constructedtreatment wetlandsShort-circuiting, which occurs when a large fraction of water traveling through a systemexits
急求专业英语翻译!手工的!
Modeling the hydraulic effect of transverse deep zones
on the performance of short-circuiting constructed
treatment wetlands
Short-circuiting, which occurs when a large fraction of water traveling through a system
exits well before the residence time, reduces the performance of constructed treatment
wetlands. Recent field and laboratory observations have shown that short-circuiting within
vegetatedmarsh areas results fromnarrow, continuous fast flowpaths that experience longi-
tudinal dispersion but do not exchange fluid with slow flowing regions of dense vegetation
on either side. Based on these observations, this paper develops an analytic stream tube
model with dispersion to represent flow through the marsh areas of a short-circuiting
constructed treatmentwetland under steady flowconditions. Themodel also includes trans-
verse deep zones, which rapidly dissipate fast flowpath momentum and introduce lateral
mixing through wind-driven circulation.Modeled results reveal that a transverse deep zone
that replaces a portion of a wetlandmarsh can offset the adverse impact of short-circuiting
flowpaths through two separatemechanisms. First, lateralmixing can dilute the water that
has traveled through a fast flowpath. Second, deep zones reduce the probability that fast
flowpaths align throughout the entire wetland. The model results suggest that deep zones
may improve wetland performance when properly sized and located, even when they do
not directly contribute to contaminant removal.
© 2009 Elsevier B.V. All rights reserved.

急求专业英语翻译!手工的!Modeling the hydraulic effect of transverse deep zoneson the performance of short-circuiting constructedtreatment wetlandsShort-circuiting, which occurs when a large fraction of water traveling through a systemexits
横向深水区域的水力效应对人工湿地处理的短流性能影响的模型研究
当大量水体流经某个系统的时间远远低于其预定停留时间时,即发生短流现象,它会降低人工湿地处理的性能.近期通过对现场和实验室的观察发现,在植被覆盖的沼泽区域内,由狭窄连续的快速水流路径所形成的短流呈纵向分布,但并不与水流两侧植被密集的缓流区域做水体交换.基于这样的观察结果,本文研究了一种分析流管模型,它以分布来代表稳流条件下通过短流人工湿地沼泽区域的水流.该模型同时还包括多个横向深水区域,它们可以迅速消除快速水流路径的冲力,并通过风力循环作用引入测向水体的混合.模型研究结果表明,利用分段的横向深水区域依次替代部分湿地沼泽可以通过两种不同的机理来抵消短流流动路径的负面影响.第一,侧向的混合作用可以稀释通过快速水流路径的水体；第二,深水区域的存在可以降低快速水流路径在整个湿地连成一线的可能.模型的试验结果表明,只要深水区域的规模和布局得当,即便它们不能直接对去除污染物做出贡献,也可能起到改善湿地性能的作用.
© 2009 Elsevier B.V. 版权所有