Experimental Study on Wetland Hydraulic Characteristics of Vegetated Drainage Ditches
AbstractSmall vegetated drainage ditches play an important role in water and nutrient removal, but may cause water blocking problems. The aim of this study was to investigate vegetated drainage ditches’ hydraulic and wetland hydraulic characters. Field experiment were carried out, small drainage ditches with Juncus, Zizania latifolia, and Acorus calamus were selected under different water flows, and a tracer experiment was also conducted. Research findings suggested that with increased water flow, vegetation roughness coefficient declined, vegetation resistance rose, and drag coefficient declined. Small drainage ditches with emergent vegetation showed a high roughness coefficient value, which was most significant in Juncus, followed by Zizania latifolia, and Acorus calamus. Plants each took on a unique eigenvalue k that was a relative coefficient between the drag coefficient and stem Reynolds number. As small ditches for drainage showed longer residence time and smaller surface hydraulic loading, they featured excellent wetland hydraulic characteristics that could be weakened rapidly as rainfall or flood intensified. This study indicates that the small vegetated drainage ditch shows favorable wetland hydraulic characteristics with good discharge capacity and can be extensively used in irrigated districts. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Zhao, S.; Cui, Y.; Luo, Y.; Li, P. Experimental Study on Wetland Hydraulic Characteristics of Vegetated Drainage Ditches. Water 2017, 9, 311.
Zhao S, Cui Y, Luo Y, Li P. Experimental Study on Wetland Hydraulic Characteristics of Vegetated Drainage Ditches. Water. 2017; 9(5):311.Chicago/Turabian Style
Zhao, Shujun; Cui, Yuanlai; Luo, Yufeng; Li, Peifeng. 2017. "Experimental Study on Wetland Hydraulic Characteristics of Vegetated Drainage Ditches." Water 9, no. 5: 311.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.