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New proposals of the recycling system to symbiose with the nature based on the evaluation of the environmental improvement functions of roof-top planting in urban area

基于城市屋顶绿化环境改善功能评价的与自然共生的循环系统新建议

基本信息

批准号：
17380026
负责人：
MAENAKA Hisayuki
金额：
$ 10.61万
依托单位：
Osaka Prefecture University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

According to some conducted question surveys for urban residents, their preferences are for parks and roadside trees rather than green roofs of buildings as greenness in their city areas. In terms of public measures, urban residents give priority to imposition of greening of the on a large scale private institutions. As for the local governments that have the policy of a rooftop planting, the problem is the lack of the budget for the promotion and it is necessary to educate the citizens concerning the consciousness of planting. On the other hand, as for the facilities with the rooftop planting, they need the continual help of the maintenance expenses and the reduction of the tax because the payment of the facility administrator was large. Sweet potato plants were cultured in a hydroponic system on a roof. The plant canopy temperature decreased by 23℃ at most compared with a concrete surface. The temperature on the sweet potato canopy was lower than a grassland and tree canopies. Sweet … More potato varieties with higher growth rates showed higher ability for reducing temperatures. The yield of sweet potatoes on the roof was mostly the same as conventional field grown plants. Aquatic insects such as larvae of a dragonfly, Pantala flavescens, and adults of a dytiscid, Eretes sticticus, occurred in the ponds placed on the roof. Larvae of swallowtail butterflies, Papilio machaon and Papilio xuthus were found both on the ground and on the roof, and the mortality rate was significantly lower on the roof. Result of a plot experiment indicated that roof planting facility had a conservation function of thermal environment of its surroundings and the inside of building. The facility could also reduce the discharge of rainfall on the roof. The function to purify pollutant load from atmosphere by the facility cannot be expected basically, but the facility with lawn on its surface can reduce only the total nitrogen load from the atmosphere. In order to evaluate the amelioration of urban heat island effects with latent heat flux from green roofs, the pond was installed on a building roof. Evapotranspiration in summer was estimated with the observation of water level and precipitation. Over the 76 days study, total evapotranspiration was 361 mm corresponding to 78% energy of total solar radiation. Covering with aquatic plants on water surface increased evapotrnspiration efficiency. Less

根据一些针对城市居民的问卷调查，他们更喜欢公园和路边的树木，而不是建筑物的绿色屋顶。在公共措施方面，城市居民优先对大规模的私人机构进行绿化。至于有屋顶种植政策的地方政府，问题是缺乏推广的预算，有必要教育公民关于种植的意识。另一方面，对于屋顶种植的设施，他们需要不断的帮助，维护费用和减少税收，因为设施管理员的支付是巨大的。甘薯植株在屋顶上的水培系统中培养。与混凝土地面相比，植物冠层温度最多降低23℃。甘薯冠层温度低于草地和乔木冠层。甜 ...更多信息生长速度快的品种具有较强的降温能力。屋顶上的甘薯产量与常规田间种植的植物基本相同。水生昆虫，如幼虫的一个，Pantala flavescens，和成人的dytiscid，Eretes sticticus，发生在池塘放在屋顶上。在地面和屋顶上都有凤蝶、凤蝶和凤蝶的幼虫，屋顶上的死亡率明显较低。小区试验结果表明，屋顶绿化设施对周围环境和建筑内部的热环境具有一定的保护作用。该设施还可以减少屋顶上的雨水排放。该设施对大气污染物负荷的净化作用基本上不能指望，而表面有草坪的设施只能减少大气总氮负荷。为了评价绿色屋顶潜热通量对城市热岛效应的改善作用，在建筑物屋顶上安装了一个水池。通过对水位和降水的观测，估算了夏季蒸散量。在76天的研究中，总蒸散量为361毫米，相当于总太阳辐射能量的78%。水面覆盖水生植物可提高蒸发蒸腾效率。少