Integrated surface-subsurface hydrologic modelling of fluid flow, solute and thermal transport

流体流动、溶质和热传输的综合地表-地下水文建模

• 批准号: 109542-2011
• 负责人: Sudicky, Edward
• 金额: $ 2.4万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=569157
• 关键词: Integrated; surface; subsurface; hydrologic; modelling

Fluid flow and spreading patterns of contaminants or thermal energy in groundwater and surface water systems are strongly influenced by the spatial variability of hydraulic parameters, multi-component chemical reaction processes and atmospheric inputs. In the context of surface and subsurface flow regimes, which are inherently coupled, realistic computational models designed to predict overland, stream and variably-saturated subsurface flow rates and contaminant and thermal energy exchange fluxes must also accommodate complex topography, spatial and temporal variations in land use/land cover and episodic or long-term forcing functions, all at the sub-watershed to watershed to continental scales in three dimensions. My recent strides in computational hydrogeology/hydrology to address problems involving strongly coupled systems have uniquely positioned us to explore many of the salient issues at hand in unprecedented detail in 3D at scales ranging from hundreds to thousands of square kilometres and beyond. In order to gain insight into the behaviour of atmospheric/surface/subsurface exchange processes in heterogeneous surface/subsurface flow systems, high-resolution numerical simulations of a variety of contemporary problems facing surface water and groundwater scientists, including model applications to well-monitored watersheds, will be performed. The proposed research will focus on both water quantity and quality issues. My research group has been actively developing and applying new 3D numerical solution strategies to solve the highly nonlinear partial differential equations describing fluid flow, mass and heat transport in an integrated surface/subsurface modelling framework. Our 3D fully-integrated surface/subsurface model HydroGeoSphere is state-of-the-art and is widely used by the scientific community. Full coupling of a parallel version of HydroGeoSphere to several well-known climate models is being performed because existing climate models fail to represent the dynamics of saturated-zone groundwater flow and the complex patterns of water infiltration/exfiltration over the land surface and related groundwater interactions between streams, wetlands and water bodies.

地下水和地表水系统中污染物或热能的流体流动和扩散模式受到水力参数、多组分化学反应过程和大气输入的空间变化的强烈影响。在本质上耦合的地表和地下流态的背景下，设计用于预测陆上、河流和可变饱和地下流速以及污染物和热能交换通量的现实计算模型还必须适应陆地上复杂的地形、空间和时间变化使用/土地覆盖和偶发或长期强迫函数，全部在三个维度的次流域到流域到大陆尺度上。我最近在计算水文地质学/水文学方面取得的进展，解决了涉及强耦合系统的问题，这使我们能够以前所未有的细节在 3D 中探索许多突出的问题，规模从数百到数千平方公里甚至更远。为了深入了解异质地表/地下流动系统中大气/地表/地下交换过程的行为，对地表水和地下水科学家面临的各种当代问题进行高分辨率数值模拟，包括模型在监测良好的流域中的应用，将被执行。拟议的研究将重点关注水量和质量问题。我的研究小组一直在积极开发和应用新的 3D 数值求解策略，以求解在集成的地表/地下建模框架中描述流体流动、质量和热传输的高度非线性偏微分方程。我们的 3D 完全集成地表/地下模型 HydroGeoSphere 是最先进的，被科学界广泛使用。正在将 HydroGeoSphere 的并行版本与几个著名的气候模型完全耦合，因为现有的气候模型无法代表饱和区地下水流的动态以及地表水渗透/渗出的复杂模式以及相关的地下水相互作用溪流、湿地和水体之间。