描述生物滞留物渗透特性的渗透模型比较

IF 2.4 3区 环境科学与生态学 Q2 ENGINEERING, CIVIL
Jianlong Wang , Jianying Song , Hongjun Lin , Liuwei Peng , Kai Li , Zexi Wang
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引用次数: 5

摘要

生物滞留是一种低影响开发措施,不仅可以减少雨水径流总量,降低洪峰流量,延迟洪峰时间,而且可以去除径流污染物,因此得到广泛应用。入渗是生物滞留的重要水文过程,可以评价其径流总量减少和污染物去除效果。因此,寻找一个能很好地描述生物滞留渗透性能的最佳渗透模型是很重要的。选择Horton、Philip和Kostiakov模型,比较其描述生物滞留渗透特性的准确性,并通过最大绝对误差(MAE)、偏差和决定系数(R2)评估不同模型模拟结果与实验结果之间的误差。实验结果表明,Horton模型在不同的实验条件下均具有较好的拟合性和灵活性,特别是在水头为10 cm时,MAE为0.50 ~ 0.81 cm/h,偏差为0.1 ~ 0.23 cm/h, R2为0.98 ~ 0.99。Philip和Kostiakov模型在入渗初期R2均大于0.87,但随着入渗时间的延长,模型拟合精度显著降低。提出以总径流量捕获比和排空时间评价Horton模型的灵活性,二者的Nash-Sutcliffe效率系数分别大于0.61和0.58。因此,可以优选Horton模型来描述生物滞留物的入渗过程及其水文评价。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparison of infiltration models to describe infiltration characteristics of bioretention

Bioretention is one of low-impact development measures, which widely used not only because it can reduce stormwater runoff total volume, decrease peak flow rate and delay peak flow time, but also can remove the runoff pollutants. Infiltration is an important hydrological process for bioretention to evaluate its runoff total volume reduction and pollutants removal. So, it is important to find an optimal infiltration model that can well describe the infiltration performance of bioretention. The Horton, Philip and Kostiakov infiltration models were selected to compare their accuracy when using for describe the infiltration characteristics of bioretention, and the errors between the different models simulate results and experiment results were assessed via the maximum absolute error (MAE), bias and coefficient of determination (R2). The experimental results showed that Horton model is fitting well and flexible under different experiment conditions, especially when the hydraulic head was 10 cm, with MAE of 0.50–0.81 cm/h, bias of 0.1–0.23 cm/h and R2 of 0.98–0.99. R2 of the Philip and Kostiakov models were all over than 0.87 at the initial infiltration period, but the model fitting accuracy decreased significantly with infiltration time elapse. Furthermore, the total runoff volume capture ratio and emptying time were advanced used to evaluate the flexibility of Horton model, and the Nash-Sutcliffe efficiency coefficients of them were over than 0.61 and 0.58, respectively. Therefore, the Horton model can be optimal selected to describe the infiltration process of bioretention and for its hydrological evaluation.

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来源期刊
Journal of Hydro-environment Research
Journal of Hydro-environment Research ENGINEERING, CIVIL-ENVIRONMENTAL SCIENCES
CiteScore
5.80
自引率
0.00%
发文量
34
审稿时长
98 days
期刊介绍: The journal aims to provide an international platform for the dissemination of research and engineering applications related to water and hydraulic problems in the Asia-Pacific region. The journal provides a wide distribution at affordable subscription rate, as well as a rapid reviewing and publication time. The journal particularly encourages papers from young researchers. Papers that require extensive language editing, qualify for editorial assistance with American Journal Experts, a Language Editing Company that Elsevier recommends. Authors submitting to this journal are entitled to a 10% discount.
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