《Hydrological Processes》杂志刊登“雨水渗透系统水力性能的二维模型 ”

作者：D. Browne, A. Deletic, G. M. Mudd, T. D. Fletcher

刊物：Hydrological Processes ，2013年，27卷19期，2785–2799页

关键词： 渗透；雨水渗透系统；非饱和流；模型校准；数值逼近和分析；地下水和地表水的交互作用

摘要：雨水渗透系统是城市雨水控制的常用方法。在系统设计中通常假设雨水渗漏是一维饱和流，但这种设计并不是非常精确，因为在非饱和土壤中也会发生二维饱和流（2D）。二维可变饱和流模型所需的边界条件复杂又难以实现，因此在设计中较少采用二维可变饱和流模型。本文开发出能够模拟多孔存储的二维流的雨水渗透系统模型。该模型将非饱和土土壤水分模型与积水储量模型进行了集成，并利用水分波前追踪的方法研究了土壤饱和流。模型能够利用较少数据，较为全面的展示主要物理过程。模型验证数据来自雨水渗透水槽室内实验。本研究采用五种不同的数据组合方式对模型进行校核，以检验模型对数据输入的要求。研究发现，利用从室内土壤测试试验或观测到的水位数据校准的参数，在预测存储水位时能够得到令人满意的结果，此外，在校准数据集中增加了土壤水分数据，也能提高对土壤水分的预测。

A two-dimensional model of hydraulic performance of stormwater infiltration systems

Authors: D. Browne, A. Deletic, G. M. Mudd, T. D. Fletcher

Journal: Hydrological Processes, Volume 27, Issue 19, pages 2785–2799, 2013

Keywords: infiltration; stormwater infiltration system; unsaturated flow; model calibration; numerical approximation and analysis; groundwater/surface water interaction

Abstract：Stormwater infiltration systems are a popular method for urban stormwater control. They are often designed using an assumption of one-dimensional saturated outflow, although this is not very accurate for many typical designs where two-dimensional (2D) flows into unsaturated soils occur. Available 2D variably saturated flow models are not commonly used for design because of their complexity and difficulties with the required boundary conditions. A purpose-built stormwater infiltration system model was thus developed for the simulation of 2D flow from a porous storage. The model combines a soil moisture–based model for unsaturated soils with a ponded storage model and uses a wetting front-tracking approach for saturated flows. The model represents the main physical processes while minimizing input data requirements. The model was calibrated and validated using data from laboratory 2D stormwater infiltration trench experiments. Calibrations were undertaken using five different combinations of calibration data to examine calibration data requirements. It was found that storage water levels could be satisfactorily predicted using parameters calibrated with either data from laboratory soils tests or observed water level data, whereas the prediction of soil moistures was improved through the addition of observed soil moisture data to the calibration data set.

原文链接： http://onlinelibrary.wiley.com/doi/10.1002/hyp.9373/abstract