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首页> 外文期刊>Landscape and ecological engineering >Rainwater storage/infiltration function of rain gardens for management of urban storm runoff in Japan
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Rainwater storage/infiltration function of rain gardens for management of urban storm runoff in Japan

机译：日本雨水花园的雨水蓄水入渗功能

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Rain gardens have recently gained popularity in Japan for the management of urban storm runoff. However, due to limited expertise regarding the technical capacity of such facilities, the level of their optimality in urban development remains unclear. To help elucidate rain garden capacity, research on two such facilities (referred to here as RG1 and RG2) was conducted in Kyoto, Japan, to clarify the characteristics of their storage/infiltration function. Rainfall and groundwater levels were monitored for 134 days between summer and autumn (a period incorporating the typhoon season) with the consideration of groundwater levels and soil water characteristics in six soil layers. Soil constitution and hydraulic conductivity in a saturated state were also evaluated to help clarify the infiltration function of the rain gardens. The results showed that RG2 had a higher water storage volume (109.54 m(3)) than RG1 (92.14 m(3)) due to the difference in area and soil porosities. Across both the rain gardens, the saturated hydraulic conductivity of each layer averaged to 0.227 cm/s, indicating a low risk of ponding. The soil available water capacity of dressing layers and existing soil layers at the greening site were excellent (> 12%) and good (between 8 and 12%). The results of the study indicated favorable storage/infiltration functions in both gardens and the potential to control more than 60% of storm runoff. The application of rain gardens may, therefore, be recommended in other urban areas of Japan.
机译：雨水花园最近在日本因管理城市暴雨径流而受到欢迎。但是，由于有关此类设施的技术能力的专门知识有限，其在城市发展中的最佳水平尚不清楚。为了帮助阐明雨水花园的容量，在日本京都进行了两种这样的设施（这里称为RG1和RG2）的研究，以阐明其存储/渗透功能的特征。在夏季和秋季（包括台风季节在内）之间的134天内监测了降雨和地下水位，同时考虑了六个土壤层的地下水位和土壤水分特征。还评估了饱和状态下的土壤组成和水力传导率，以帮助弄清雨林的渗透功能。结果表明，由于面积和土壤孔隙率的差异，RG2具有比RG1（92.14 m（3））高的蓄水量（109.54 m（3））。在两个雨花园中，每层的饱和导水率平均为0.227 cm / s，表明积水的风险很低。绿化场所覆盖层和现有土壤层的土壤有效水容量极好（> 12％），且良好（8％至12％）。研究结果表明，两个花园均具有良好的存储/入渗功能，并且有可能控制超过60％的暴雨径流。因此，建议在日本其他城市地区使用雨水花园。

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