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Evaluating three commonly used infiltration methods for permeable surfaces in urban areas using the SWMM and STORM
Hydrology Research ( IF 2.6 ) Pub Date : 2021-02-01 , DOI: 10.2166/nh.2021.048
Frida E. Å. Parnas 1 , Elhadi M. H. Abdalla 2 , Tone M. Muthanna 2
Affiliation  

Climate change and urbanization increase the pressure on combined sewer systems in urban areas resulting in elevated combined sewer overflows, degraded water quality in receiving waters, and changing stream flows. Permeable surfaces offer infiltration potential, which can contribute to alleviate the runoff to combined sewer systems. The variation in urban soil characteristics and the initial moisture conditions before a rainfall event are important factors affecting the infiltration process and consequently runoff characteristics. In this study, the urban hydrological models SWMM and STORM are used to evaluate the Green-Ampt, Horton, and Holtan infiltration methods for three urban sandy soils. A sensitivity analysis was carried out on a set of key parameter values. In addition, long-term simulations were conducted to evaluate the ability to account for initial soil moisture content. The results showed that the Holtan method's ability to account for both available storage capacity and maximum infiltration rate, as well as evapotranspiration in the regeneration of infiltration capacity, gave the best result with regard to runoff behaviour, especially for long-term simulations. Furthermore, the results from the urban sandy soils with different infiltration rate at saturation, together with a high sensitivity to the degree of sensitivity for maximum infiltration rate under dry conditions and minimum infiltration rate under wet conditions, indicate that field measurements of infiltration rate should be carried out at saturation for these soils.



中文翻译:

使用SWMM和STORM评估城市地区渗透性表面的三种常用渗透方法

气候变化和城市化增加了城市地区下水道综合系统的压力,导致下水道综合溢流加剧,接收水的水质下降以及溪流变化。渗透性表面具有渗透潜力,可有助于减少下水道向联合污水系统的排放。城市土壤特征的变化和降雨事件发生前的初始湿度条件是影响入渗过程并进而影响径流特征的重要因素。在这项研究中,使用城市水文模型SWMM和STORM来评估三种城市沙质土壤的Green-Ampt,Horton和Holtan入渗方法。对一组关键参数值进行了敏感性分析。此外,进行了长期模拟,以评估考虑初始土壤水分含量的能力。结果表明,Holtan方法能够考虑可用的存储容量和最大入渗率,以及在入渗能力再生中的蒸散量,在径流特性方面,尤其是长期模拟中,给出了最佳结果。此外,在饱和条件下不同渗透率的城市沙土的结果,以及对干旱条件下最大渗透率和湿润条件下最小渗透率的敏感度高度敏感的结果表明,应实地测量渗透率对这些土壤进行饱和处理。结果表明,Holtan方法能够考虑可用的存储容量和最大入渗率,以及在入渗能力再生中的蒸散量,在径流特性方面,尤其是长期模拟中,给出了最佳结果。此外,在饱和条件下不同渗透率的城市沙土的结果,以及对干旱条件下最大渗透率和湿润条件下最小渗透率的敏感度高度敏感的结果表明,应实地测量渗透率对这些土壤进行饱和处理。结果表明,Holtan方法能够考虑可用的存储容量和最大入渗率,以及在入渗能力再生中的蒸散量,在径流特性方面,尤其是长期模拟中,给出了最佳结果。此外,在饱和条件下不同渗透率的城市沙土的结果,以及对干旱条件下最大渗透率和湿润条件下最小渗透率的敏感度高度敏感的结果表明,应实地测量渗透率对这些土壤进行饱和处理。在径流特性方面给出了最佳结果,尤其是对于长期模拟而言。此外,在饱和条件下不同渗透率的城市沙土的结果,以及对干旱条件下最大渗透率和湿润条件下最小渗透率的敏感度高度敏感的结果表明,应实地测量渗透率对这些土壤进行饱和处理。在径流特性方面给出了最佳结果,尤其是对于长期模拟而言。此外,城市沙质土壤的饱和渗透率不同的结果,以及对干旱条件下最大渗透率和湿润条件下最小渗透率的敏感度高度敏感的结果表明,应现场测量渗透率。对这些土壤进行饱和处理。

更新日期:2021-02-15
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