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首页> 外文会议>World water and environmental resources congress 2003 and related symposia >Analysis of Interaction between Surface and Subsurface Flows Using Conjunctive 2-D Surface-3-D Subsurface Flow Model
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Analysis of Interaction between Surface and Subsurface Flows Using Conjunctive 2-D Surface-3-D Subsurface Flow Model

机译：使用二维二维3维三维地下流模型分析地表与地下流之间的相互作用

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摘要

This paper presents a conjunctive 2-D surface and 3-D subsurface flow model, which deals with the interaction between surface and subsurface flows. The model uses the non-inertia approximation of the Saint-Venant equations for two-dimensional unsteady surface flow and a modified version of the Richards equation for three-dimensional unsteady unsaturated and saturated subsurface flows. The equations are written in the form of 2-D and 3-D heat diffusion equations respectively. In the model the surface and subsurface flow components are coupled interactively using the common boundary condition of infiltration through the ground surface. rnOverland flow is generally classified into Hortonian and saturation overland flows in watershed hydrology. The conjunctive model was, after verification with experimental data, applied to a hypothetical watershed to simulate examples of 2-D saturation overland flow and 3-D saturated and unsaturated subsurface flow. The model demonstrates that overland flow is initiated when rainwater supply exceeds infiltrability, not only in Hortonian but even in saturation overland flow. The model also simulates overland flow, infiltration, seepage, subsurface flow, and the interaction between subsurface and channel flows. The conjunctive model, as a general model to deal with the interaction between surface and subsurface flows, contributes as a tool for improved detailed simulation of 2-D surface and 3-D subsurface flows and their interaction.
机译：本文提出了一个联合的二维表面和三维地下流体模型，该模型处理了地面与地下流体之间的相互作用。该模型对二维非稳态表面流使用Saint-Venant方程的非惯性近似，对三维非稳态非饱和和饱和地下流使用Richards方程的修改版本。这些方程式分别以2-D和3-D热扩散方程式形式编写。在该模型中，地表渗流和地下渗流分量使用渗透穿过地面的公共边界条件进行交互耦合。在流域水文学中，陆上水流通常分为Hortonian和饱和陆上水流。在通过实验数据验证之后，将这个联合模型应用于一个假设的分水岭，以模拟二维饱和土流和三维饱和和非饱和地下流的实例。该模型表明，当雨水供应量超过渗透能力时，不仅在霍托尼亚流域，甚至在饱和的陆流中，都启动了陆流。该模型还模拟了陆地流，入渗，渗流，地下流以及地下流与河道流之间的相互作用。作为处理地表和地下流动之间相互作用的通用模型，联合模型有助于改进二维表面和3-D地下流动及其相互作用的详细模拟。

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