تعیین اثرات پوشش گیاهی اضطراری
ترجمه نشده

تعیین اثرات پوشش گیاهی اضطراری

عنوان فارسی 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
مجله/کنفرانس: دسترسی – IEEE Access
رشته های تحصیلی مرتبط: مهندسی منابع طبیعی
کلمات کلیدی فارسی: 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
نوع نگارش مقاله: مقاله پژوهشی (Research Article)
نمایه: Scopus – Master Journals List – JCR
شناسه دیجیتال (DOI): https://doi.org/10.1109/ACCESS.2019.2946917
دانشگاه: Research Center for Engineering Ecology and Nonlinear Science, North China Electric Power University, Beijing 102206, China
ناشر: آی تریپل ای - IEEE
نوع ارائه مقاله: ژورنال
نوع مقاله: ISI
سال انتشار مقاله: 2019
ایمپکت فاکتور: 4.641 در سال 2018
شاخص H_index: 56 در سال 2019
شاخص SJR: 0.609 در سال 2018
شناسه ISSN: 2169-3536
شاخص Quartile (چارک): Q2 در سال 2018
فرمت مقاله انگلیسی: PDF
تعداد صفحات مقاله انگلیسی: 13
وضعیت ترجمه: ترجمه نشده است
قیمت مقاله انگلیسی: رایگان
آیا این مقاله بیس است: خیر
آیا این مقاله مدل مفهومی دارد: ندارد
آیا این مقاله پرسشنامه دارد: ندارد
آیا این مقاله متغیر دارد: ندارد
کد محصول: E13843
رفرنس: دارای رفرنس در داخل متن و انتهای مقاله
فهرست انگلیسی مطالب

Abstract


I. Introduction


II. Theoretical Considerations


III. Experimental Setup


IV. Results


V. Discussions


Authors


Figures


References

نمونه متن انگلیسی 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].

  • اشتراک گذاری در

دیدگاه خود را بنویسید:

تاکنون دیدگاهی برای این نوشته ارسال نشده است

تعیین اثرات پوشش گیاهی اضطراری
نوشته های مرتبط
مقالات جدید
لوگوی رسانه های برخط

logo-samandehi

پیوندها