مقاله انگلیسی رایگان در مورد تعیین اثرات پوشش گیاهی اضطراری – IEEE 2019

IEEE

 

مشخصات مقاله
ترجمه عنوان مقاله تعیین اثرات پوشش گیاهی اضطراری بر ضریب مانینگ جریان تدریجی متنوع
عنوان انگلیسی مقاله Determination of Emergent Vegetation Effects on Manning’s Coefficient of Gradually Varied Flow
انتشار مقاله سال ۲۰۱۹
تعداد صفحات مقاله انگلیسی ۱۳ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه IEEE
نوع نگارش مقاله
مقاله پژوهشی (Research Article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) Scopus – Master Journals List – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF)
۴٫۶۴۱ در سال ۲۰۱۸
شاخص H_index ۵۶ در سال ۲۰۱۹
شاخص SJR ۰٫۶۰۹ در سال ۲۰۱۸
شناسه ISSN ۲۱۶۹-۳۵۳۶
شاخص Quartile (چارک) Q2 در سال ۲۰۱۸
مدل مفهومی ندارد
پرسشنامه ندارد
متغیر ندارد
رفرنس دارد
رشته های مرتبط مهندسی منابع طبیعی
نوع ارائه مقاله
ژورنال
مجله / کنفرانس دسترسی – IEEE Access
دانشگاه  Research Center for Engineering Ecology and Nonlinear Science, North China Electric Power University, Beijing 102206, China
کلمات کلیدی ضریب مانینگ، جزء گیاهی ضریب مانینگ، پوشش گیاهی غوطه ور نشده سفت، جریان تدریجی متنوع، نسبت سطح پوشش گیاهی
کلمات کلیدی انگلیسی  Manning’s coefficient, vegetal component of Manning’s coefficient, rigid unsubmerged vegetation, gradually varied flow, vegetation coverage area ratio
شناسه دیجیتال – doi
https://doi.org/10.1109/ACCESS.2019.2946917
کد محصول  E13843
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
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فهرست مطالب مقاله:
Abstract
I. Introduction
II. Theoretical Considerations
III. Experimental Setup
IV. Results
V. Discussions
Authors
Figures
References

 

بخشی از متن مقاله:
Abstract

Based on mechanical derivation, a new formula showing the effects of emergent vegetation on Manning’s coefficient was established for complex gradually varied flow affected by rigid unsubmerged vegetation in open channels. The new formula indicates that the Manning’s coefficient is a quadratic sum of its vegetal and boundary components with coefficients related to vegetation parameters. The variation characteristics of the total Manning’s coefficient and its vegetal component calculated by the new formula were investigated by a series of laboratory experiments under different vegetation coverage area ratios. It was found that the variations of both the total Manning’s coefficient and its vegetal component followed a linear decreasing trend along the vegetation section. Moreover, linear and power empirical formulas were constructed for the average total Manning’s coefficient and its vegetal component related to the vegetation coverage area ratio, respectively. The findings of the research may expand the theoretical connotations of the Manning’s coefficient for open channel hydraulics and demonstrate practical significance to engineering applications of the Manning’s coefficient for gradually varied flow in vegetated channels.

Introduction

Manning’s coefficient, which was proposed by the Irish engineer Robert Manning, comprehensively reflects the influence of channel roughness on water flow, and is widely used in traditional hydraulics to determine the degree of roughness in natural open channels [1], [2]. With decades of research in the field, Chow evaluated and tabulated the values of Manning’s coefficient for different surface roughness values [3]. However, the hydraulic conditions, such as flow resistance, are significantly changed as vegetation blocks the water flow into a partially continuous system [4], [5]. Numerous papers can be found in the literature that focus on the evaluation of vegetation effects on channel roughness [6]–[۹]. For vegetated channel flow, Palmer proposed an empirical relationship in which the Manning’s coefficient is related to the product of the flow velocity v and the hydraulic radius R [10], [11]. Engineers have adapted this relationship in the design of irrigation channels and other vegetated waterways [3]. Nonetheless, experimental studies by Kouwen and Li indicated that the Manning’s coefficient is not always linearly related to the product of flow velocity and hydraulic radius [12].

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