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Representative roughness height of submerged vegetation.

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Representative roughness height of submerged vegetation.
นักวิจัย : Cheng, Nian-Sheng
คำค้น : DRNTU::Engineering::Civil engineering::Water resources.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2554
อ้างอิง : Cheng, N. S. (2011). Representative roughness height of submerged vegetation. Water resources research, 47(8). , 0043–1397 , http://hdl.handle.net/10220/7111 , http://dx.doi.org/10.1029/2011WR010590
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Water resources research
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Roughness length scale is important in the evaluation of resistance caused by submerged vegetation in open channel flows. By transforming the concept of hydraulic radius, a representative roughness height is proposed in this study for quantifying effect of submerged vegetation on flow resistance in the surface layer. The proposed roughness height is characterized by its proportionality to both stem diameter and vegetation concentration and performs better than other length scales in collapsing resistance data collected under a wide range of vegetation conditions. An approach is then developed for estimate of the average flow velocity and thus resistance coefficients for both cases of rigid and flexible vegetation. Comparisons are also made between the present study and other four formulas available in the literature. This study also shows that all the formulas, if simplified for some simple conditions, can be unified in a general form.

บรรณานุกรม :
Cheng, Nian-Sheng . (2554). Representative roughness height of submerged vegetation..
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Cheng, Nian-Sheng . 2554. "Representative roughness height of submerged vegetation.".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Cheng, Nian-Sheng . "Representative roughness height of submerged vegetation.."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2554. Print.
Cheng, Nian-Sheng . Representative roughness height of submerged vegetation.. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2554.