基于HYDRUS-1D生物滞留设施雨水径流水文调控模拟
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TV121

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国家重大科技专项(2018ZX07110-002);河北省自然科学基金(E2018402172);河北省高等学校科学技术研究项目(QN2019148);河北省水环境科学实验室开放课题(HBSHJ202104)


Hydrological regulation simulation of rainwater runoff of bioretention based on HYDRUS-1D
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    摘要:

    为研究生物滞留设施水文调控效能,基于HYDRUS-1D建立生物滞留设施模型,通过物模试验数据率定模型参数,验证模型可靠性;利用验证后的模型开展模拟试验,采用径流总量和峰值削减率及产流和峰现延迟时间定量分析水力负荷参数、蓄水层高度和初始含水率对生物滞留设施水文调控效应的影响。结果表明:所建模型模拟值与实测值的均方根误差最高仅为0.134,相对误差为-2.28%~7.59%,纳什效率系数和决定系数均在0.8以上,模拟结果可靠;综合考虑水力负荷参数,汇流比小于10∶1的生物滞留设施对于重现期小于1a并且降雨时长小于120min的降雨过程有较好的调控效果,随着汇流比、重现期和降雨时长的增加,设施水文调控效果不断削弱;增加蓄水层高度会提升生物滞留设施水文调控效果,当蓄水层高度由0cm增加至25cm时,径流总量和峰值削减率分别增加86.16%和96.74%,产流和峰现延迟时间分别为57.8min和36.0min;初始含水率的增大会降低设施水文调控效果,其径流总量和峰值削减率变化范围分别为49.32%~54.11%和22.84%~45.37%,产流和峰现延迟时间变化范围分别为24.1~25.0min和1.0~2.5min。

    Abstract:

    In order to study the hydrological regulation efficiency of bioretention facilities, a bioretention model was established based on HYDRUS-1D, and the model parameters were calibrated through experimental data to verify the reliability of the model. The verified model was used to carry out simulation experiments, and the influence of hydraulic load parameters, aquifer height and initial water content on the hydrological regulation effect of bioretention was quantitatively analyzed by using the total runoff and peak reduction rate, and the delay time of runoff and peak emergence. The results showed that the maximum root mean square error of the simulated and measured values was only 0.134, the relative error was-2.28% to 7.59%, the Nash-Sutcliffe efficiency and R2 were both above 0.8, and the simulation results were reliable. Comprehensively considering the hydraulic load parameters, the bioretention with a confluence ratio of less than 10∶1 have a better control effect on the rainfall process with a return period of less than 1a and a rainfall duration of less than 120min. With the increase of the confluence ratio, return period and rainfall duration, the hydrological control effect of facilities continues to weaken. Increasing the height of the aquifer will improve the hydrological regulation effect of the bioretention. When the height of the aquifer increases from 0cm to 25cm, the total runoff and peak reduction rate increase by 86.16% and 96.74%, respectively, and the runoff generation and peak emergence delay time are extended by 57.8min and 36.0min, respectively. The increase of the initial water content will reduce the hydrological control effect of the bioretention, the total runoff and peak reduction rate ranged from 49.32% to 54.11% and 22.84% to 45.37%, respectively, and the range of runoff generation and peak-occurrence delay time ranged from 24.1min to 25.0min and 1.0min to 2.5min, respectively.

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张炜,王浩远,赵玉华,等.基于HYDRUS-1D生物滞留设施雨水径流水文调控模拟[J].水资源保护,2022,38(3):102-108.(ZHANG Wei, WANG Haoyuan, ZHAO Yuhua, et al. Hydrological regulation simulation of rainwater runoff of bioretention based on HYDRUS-1D[J]. Water Resources Protection,2022,38(3):102-108.(in Chinese))

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  • 在线发布日期: 2022-05-20
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