为郊区街景设计的树木集成透沟的雨水保留性能
Paul A Hanley1, Stephen J Livesley1, Tim D Fletcher1
1School of Agriculture, Food and Ecosystem Sciences, The University of Melbourne, 500 Yarra Boulevard, Burnley, VIC 3121, Australia.
The Science of the total environment
|October 2, 2024
概括
城市透沟显示出雨水管理和树木生长的潜力,但缓慢的透和糟糕的排水限制了有效性. 有效的雨水系统需要适当的排水,特别是在重土壤中,以促进树木的健康.
科学领域:
- 城市水文学和可持续的城市排水系统 (SuDS).
- 地质工程和土壤科学.
- 城市林业和树木种植.
背景情况:
- 城市暴风雨水的排放大大降低了城市河流的质量.
- 在街道景观中的透沟提供了一个潜在的解决方案,以保留流水并增强树木生长.
- 了解结构性土壤和被动灌对树木发展的影响对于城市绿化至关重要.
研究的目的:
- 评估结构性土壤透沟的有效性,以捕获城市雨水流水.
- 评估这些系统对相邻树木生长速度的影响.
- 为了区分结构性土壤与被动灌对树木生长的影响.
主要方法:
- 在澳大利亚墨尔本安装六个结构性土壤透沟 (三个接收停车场排水,三个没有排水).
- 在19个月的时间内监测流水捕获,过,流出和树木生长.
- 对土壤条件和排水性能与树木发展有关的分析.
主要成果:
- 只有一个系统实现了其设计意图,由于土壤外速度非常缓慢 (<0.1 mm h-1),保留了18%的下水.
- 紧的土壤导致了沟和度,阻碍了在没有接收无透流水的系统中的性能.
- 没有足够排水的沟附近的树木表现出不良的生长 (59%的相对增长),而那些接受停车场排水的树木壮成长 (112%的相对增长).
结论:
- 结构性土壤透沟有可能满足当地的雨水透目标.
- 有效的排水对于促进街道风景雨水系统中的树木生长至关重要,特别是在重质地土壤中.
- 减少地表流失需要超越被动透的战略,以实现减少体积的目标.
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