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植被类型和蓄水层对绿色屋顶蒸散发的影响

来源：花匠小妙招时间：2024-11-08 06:17

植被类型和蓄水层对绿色屋顶蒸散发的影响

基金项目:

国家自然科学基金项目（面上项目，重点项目，重大项目）；广西省自然科学基金创新研究团队项目；广西自治区财政八桂学者项目

Effects of plant types and water retention layer on evapotranspiration of green roofs

Author:

Liu Jiaqin

College of Civil Engineering and Architecture Guangxi University
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Huang Shan Wang Jun Wang Hao Zhang Kexin Gan Lin Mei Guoxiong

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)；The Innovative Research Team Program of Guangxi Natural Science Foundation;The Bagui Scholars Program

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摘要:

为了定量分析植被类型和蓄水层设置对干旱时期拓展型绿色屋顶蒸散发特性的影响，本实验设计两种形式（有无蓄水层）和三种植被类型（麦冬草、佛甲草或姬十二单）的6个绿色屋顶模型桶，通过对绿色屋顶进行连续3个月的现场监测。结果表明，蓄水层设置显著提高了基质含水量，并在降雨后一定时间（约3天）内保持较高的稳定含水量；有蓄水层绿色屋顶实际蒸散发（actual daily evapotranspiration，AET）总是高于无蓄水层绿色屋顶，平均AET提高0.6 mm/d；经历了13 d的干旱时间，蓄水层设置对维持佛甲草的蒸腾速率最有效，相比于无蓄水层的佛甲草提升49 %的气孔导度值；蓄水层对增加种植姬十二单的绿色屋顶AET效果最好，平均AET增加了1.1 mm/d。可见本研究可为旱涝季节分明的地区绿色屋顶植被选择和蓄水层设置提供基础数据支撑和参考借鉴。

Abstract:

In order to quantitatively study the effects of plant types and water retention layer setting on the evapotranspiration of the expansive green roof during drought period, six combinations of green roof test model buckets with two structures (with or without water retention layer) and three plant types (ophiopogon japonicus, sudem lineare and ajuga repanms) were set up. Green roofs were monitored on site for three consecutive months. As suggested from the results, the water retention layer setting significantly increased the substrate moisture content and maintained a high stable moisture content for a certain time (about 3 days) after rainfall. AET（actual daily evapotranspiration）of green roof with water retention layer was always higher than that of green roofs without water retention layer, and the average AET increased by 0.6 mm/d. After 13 d of drought period, the water retention layer setting was most effective in maintaining the transpiration rate of sudem lineare, compared sudem lineare without water retention layer that stomatal conductance increased value by 49%. Water retention layer had the best effect on increasing AET on ajuga repanms green roof with an increase of 1.1 mm/d in AET. Therefore, it is concluded that this study can provide basic data support and reference for green roof vegetation selection and water retention layer setting in areas with distinct drought and flood seasons.

引用本文

刘佳亲,黄山,王俊,等. 植被类型和蓄水层对绿色屋顶蒸散发的影响[J]. 科学技术与工程, 2022, 22(6): 2437-2444.
Liu Jiaqin, Huang Shan, Wang Jun, et al. Effects of plant types and water retention layer on evapotranspiration of green roofs[J]. Science Technology and Engineering,2022,22(6):2437-2444.

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