Department of Civil and Environmental Engineering, University of Auckland, Auckland, New Zealand.
Department of Agricultural Engineering, Bahauddin Zakariya University, Multan, Pakistan E-mail:
Water Sci Technol. 2019 Oct;80(8):1476-1484. doi: 10.2166/wst.2019.397.
This paper describes the laboratory experimental investigations undertaken to analyse the influence of floating treatment wetlands (FTWs) on the hydraulic performance of a stormwater retention pond. Two experimental series were conducted, each focussed on investigating the influence of placing an FTW in a pond with firstly the inflow entering the retention pond from an inlet positioned 0.25 m offset from the longitudinal axis of the pond, and secondly the inlet positioned at the longitudinal axis of the pond. For both series of experiments, tests were undertaken at 1 l/s and 1.5 l/s, and with and without an artificial FTW installed. This study is the first to investigate the hydraulic impact of FTWs and their root systems on the performance of stormwater retention ponds. The results presented in this study suggest that FTWs are a viable method to minimise hydraulic inefficiencies, thereby increasing retention time and optimising hydraulic performance of stormwater retention ponds. The results highlight the importance of plant root characteristics. The optimal arrangement of root length is L/D = 0.5, where L = root length and D = pond depth. The results also indicate that the spatial variability of vegetation has a significant impact on the hydraulic performance of the pond.
本文描述了实验室实验研究，以分析浮式处理湿地（FTWs）对雨水滞留池水力性能的影响。进行了两个实验系列，每个系列都侧重于研究将 FTW 放置在一个池塘中的影响，首先是进水从距池塘纵轴 0.25 m 的入口进入，其次是进水位于池塘纵轴上。对于两个系列的实验，在 1 l/s 和 1.5 l/s 下进行了测试，并且有无人工 FTW 安装。本研究首次调查了 FTWs 及其根系对雨水滞留池性能的水力影响。本研究的结果表明，FTWs 是一种可行的方法，可以最小化水力效率低下，从而增加滞留时间并优化雨水滞留池的水力性能。结果强调了植物根系特征的重要性。最佳的根长比为 L/D = 0.5，其中 L = 根长，D = 池塘深度。结果还表明，植被的空间变异性对池塘的水力性能有重大影响。
