Improvement of rainwater infiltration and storage capacity by an enhanced seepage well: From laboratory investigation to HYDRUS-2D numerical analysis

IF 2.4 3区环境科学与生态学 Q2 ENGINEERING, CIVIL

Journal of Hydro-environment Research Pub Date : 2021-11-01 DOI:10.1016/j.jher.2021.10.001

Zhiqiang Zhang , Zijian Wang , Sheping Wang , Yanping Ding , Zhiming Yuan , Jinsuo Lu

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引用次数: 2

Abstract

Seepage well is an emerging Low Impact Development (LID) technology that can effectively control the storm runoff. However, its rainwater infiltration rate and storage capacity still require further enhancement. By setting a horizontal infiltration structure at the bottom of conventional rainwater seepage well (CSW), an enhanced seepage well (ESW) was proposed in this study, and its infiltration performances compared with the permeable pavement (PP) and the CSW were systemically investigated using static infiltration experiment and HYDRUS-2D simulation. The results showed that the infiltration efficiency of ESW was significantly higher than that of PP and CSW, and the process of water infiltrated through soil mainly controlled the macroscopic infiltration rate. The Nash-Sutcliff Efficient (NSE) index was used to evaluate the accuracy and reliability of the HYDRUS-2D model, and the results of NSE values greater than 0.75 (varied between 0.75 and 0.91) confirmed the applicability of HYDRUS-2D to describe correctly the hydraulic behavior of the ESW system. Simulation infiltration tests showed that the ESW performed a higher average infiltration rate and fewer total runoff volume than the CSW, indicating the effectively enhancement of the infiltration and water retention capacity of ESW, especially under heavy rainfall intensities. Additionally, the ESW system exhibited an excellent runoff-control and rainwater retention capacity in an actual rainfall scenario.

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改进渗水井提高雨水渗透和储存能力——从实验室调查到HYDRUS-2D数值分析

渗流井是一种新兴的低影响开发(Low Impact Development, LID)技术，可以有效地控制暴雨径流。但其雨水入渗速率和储水量仍需进一步提高。本研究通过在常规雨水渗流井(CSW)底部设置水平入渗结构，提出了增强型雨水渗流井(ESW)，并通过静态入渗试验和HYDRUS-2D模拟，系统研究了增强型雨水渗流井(ESW)与透水路面(PP)和增强型雨水渗流井的入渗性能。结果表明，ESW的入渗效率显著高于PP和CSW，水分通过土壤入渗过程主要控制宏观入渗速率。采用Nash-Sutcliff Efficient (NSE)指数评价HYDRUS-2D模型的准确性和可靠性，NSE值大于0.75(变化范围在0.75 ~ 0.91之间)的结果证实了HYDRUS-2D模型能够正确描述ESW系统的水力行为。模拟入渗试验表明，ESW的平均入渗速率高于CSW，总径流量小于CSW，表明ESW有效增强了其入渗和保水能力，特别是在强降雨条件下。此外，ESW系统在实际降雨情景中表现出良好的径流控制和雨水截留能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Hydro-environment Research ENGINEERING, CIVIL-ENVIRONMENTAL SCIENCES

CiteScore

5.80

自引率

0.00%

发文量

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.