针对LID型道路绿化带土壤渗透性能的改良  

Soil permeability improvement for LID-type road greenbelt

作　　者：朱木兰[1] 廖杰[1] 陈国元[1] 王吉苹[1] 佘年 

机构地区：[1]厦门理工学院水资源环境研究所,福建厦门361024 [2]美国西雅图市政府公共事业局,西雅图98104

出　　处：《水资源保护》2013年第3期25-28,33,共5页Water Resources Protection

基　　金：福建省教育厅A类科技项目(JA10252);厦门市科技计划项目(3502Z20110016)

摘　　要：城市化所伴随的不透水路面的剧增导致城市暴雨径流量的剧增、水补给量的剧减以及雨水面源污染的加剧,引发水涝、水源枯竭、水污染等一系列城市水危机问题。为了解决这些问题,基于国际先进的低影响开发(low impact developtment,LID)策略,提出构筑LID型城市道路绿化带控制城市内涝、地下水补给不足与雨水面源污染问题的新策略,并选取对磷素具有良好吸附性能的厦门本地天然红壤土作为代表,开展LID型道路绿化带土壤渗透性能的改良研究。结果表明:厦门本地天然土壤的红壤土渗透系数仅为1.631×10-4cm/s,不适用于LID型城市道路绿化带,但加入质量分数为15%～35%的砂子及5%的腐殖土可改良成LID型城市道路绿化带中所需的人工改良土壤。此外,粒径分析结果与相关文献均表明具有适宜渗透性能的改良土壤其主要成分砂粒的质量分数在60%以上。Impermeable pavement areas increase greatly with city development. As a result, they cause a lot of water problems, such as waterlogging, water pollution, and lack of groundwater recharge. In order to solve these water problems for sustainable urban development, a new strategy was proposed to control urban waterlogging, lack of groundwater recharge, and non-point source pollution by building low impact development （LID）-type road greenbelts, and the development of soil＇ s permeability for LID-type road greenbelts was studied. The study results show that red soil, which is a common kind of local natural soil in Xiamen City, is not suitable for LID-type road greenbelts due to its low permeability coefficient of 1. 631x104cm/s, but it can be improved in order to make it suitable artifical soil for LID-type road greenbelts by addition of about 15% to 35% sand and 5% humus soil. Further analysis of particle size shows that the sand content for suitable artificial soil is over 60%.

关 键 词：低影响开发 道路绿化带 城市雨水 面源污染控制 人工改良土壤 土壤渗透性能 

分 类 号：P339[天文地球—水文科学]