蓄水层设置与植物选择对绿色屋顶蒸散发的影响

被引：14

作者：

彭跃暖

秦华鹏

王传胜

黎雪然

机构：

[1] 城市人居环境科学与技术重点实验室北京大学深圳研究生院环境与能源学院

来源：

北京大学学报(自然科学版) | 2017年 / 53卷 / 04期

关键词：

绿色屋顶; 蓄水层; 植物选择; 蒸散发;

D O I：

10.13209/j.0479-8023.2017.078

中图分类号：

S688 [园林植物栽培及应用技术]; TU985.12 [城乡各类型绿化地规划];

学科分类号：

090706 ; 081303 ; 1204 ;

摘要：

为定量研究蓄水层设置和植物选择对绿色屋顶蒸散发的影响,设置两种结构(有或无蓄水层)和两种植物(佛甲草和铺地锦竹草)共4种组合的绿色屋顶实验槽,在深圳市的气候条件下,连续测定气象参数、绿色屋顶蒸散发量(ET)和土壤含水量。结果表明,蓄水层的水分蒸发对其上层土壤水分有显著的补给效应,且土壤含水量与日蒸散发量存在正相关关系,因此蓄水层的设置可以增加绿色屋顶的蒸散发量。佛甲草因其景天酸代谢方式(CAM)的特殊性,当太阳辐射较大时,气孔自动关闭,从而降低蒸散发量,减少水分流失。与铺地景竹草相比,种植佛甲草的实验槽一天内的小时蒸散发量波动较大,中午前后出现低谷,与土壤含水量的相关程度相对较低。

引用

页码：758 / 764

页数：7

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