Civil Engineering Department, NIT Kurukshetra, Haryana, India E-mail:
Water Sci Technol. 2023 Mar;87(5):1316-1326. doi: 10.2166/wst.2023.058.
The rain gardens (RGs) have been one of the best management practices in cities to reduce the impact of urban flooding. However, very little is known about various design parameters of RGs, viz., the type of plantation, planting mixtures, and RG dimensions. This study pertains to examining the influence of planting mixtures on the variations of percolation rates of the RG with Calendula officinalis plant and without plants. Six types of planting mixtures in different experimental RGs have been tried. It has been observed that the percolation rate increases with a higher percentage of compost in the planting mixture for RGs with and without plants. The percolation rate is highest for the planting mixture having 25% compost. The runoff rate reduces with a higher percentage of compost in the planting mixture for RGs with C. officinalis and bare surfaces. No runoff is produced in RGs with plant having a compost of more than 20% in the planting mixture. The outcome of the study will be useful in deciding the composition of the planting mixture which will keep the RG plant healthy and at the same time improve the hydrological performance leading to lowering urban flooding magnitude.
雨水花园（RGs）是城市减少城市洪水影响的最佳管理实践之一。然而，对于 RGs 的各种设计参数，即种植类型、种植混合物和 RG 尺寸，人们知之甚少。本研究旨在研究种植混合物对有和没有植物的 RG 渗透速率变化的影响。在不同的实验 RG 中尝试了六种类型的种植混合物。已经观察到，对于有和没有植物的 RG，种植混合物中 compost 的百分比越高，渗透速率就越高。对于种植混合物中含有 25% compost 的 RG，渗透速率最高。对于有 C. officinalis 和裸面的 RG，种植混合物中 compost 的百分比越高，径流量就越低。在种植混合物中 compost 含量超过 20%的 RG 中，不会产生径流。研究结果将有助于决定种植混合物的组成，这将保持 RG 植物的健康，同时提高水文性能，从而降低城市洪水的规模。
