An integrated data fusion approach to use geophysical measurements in hydrological models

在水文模型中使用地球物理测量的综合数据融合方法

• 批准号: 51319586
• 负责人: Professor Dr. Johan Huisman
• 金额: --
• 依托单位: Arbeitsgruppe IBG-3: Agrosphäre
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/51319586?language=en
• 关键词: integrated; data; fusion; approach; use

Geophysical measurements are a valuable source of information for the parameterization of hydrological models. Traditionally, relevant information on hydrological properties and/or state variables is obtained in a sequential approach from geophysical measurements: the geophysical survey data are inverted first, and the information thus obtained is used within the hydrological model. The aim of this project is to further develop an alternative so-called coupled hydrogeophysical inversion approach to use geophysical data in hydrological models that overcomes some of the limitations of the sequential approach. In this approach, geophysical measurements are directly included in the hydrological inverse problem by coupling a forward model of the geophysical measurements with a hydrological model and minimizing the difference between modeled and observed data by perturbing the relevant hydrological flow and transport parameters. The development of this coupled inversion approach was started in the first phase of the project. In this second phase, it will be further developed and tested on two experimental data sets consisting of electrical resistivity measurements in the saturated zone and self-potential and electrical resistivity measurements in the unsaturated zone. The first data set has already been acquired and the second data set will be acquired in this second phase. The analysis of these experiments will aim to determine both effective and spatially variable flow and transport properties from the available geophysical and conventional hydrological measurements.

地球物理测量是水文模型参数化的宝贵信息来源。传统上，水文性质和/或状态变量的相关信息是通过地球物理测量的顺序方法获得的：首先对地球物理调查数据进行反演，然后将获得的信息用于水文模型中。该项目的目的是进一步发展一种所谓的耦合水文地球物理反演方法，在水文模型中使用地球物理数据，克服顺序方法的一些局限性。在该方法中，通过将地球物理测量的正演模型与水文模型耦合，并通过扰动相关的水文流量和运输参数，使模拟数据与观测数据之间的差异最小化，将地球物理测量直接纳入水文反问题。这种耦合反演方法的开发始于项目的第一阶段。在第二阶段，将进一步开发和测试两个实验数据集，包括饱和区电阻率测量和不饱和区自电位和电阻率测量。第一个数据集已经获得，第二个数据集将在第二阶段获得。对这些实验的分析将旨在从可用的地球物理和常规水文测量中确定有效的和空间可变的流量和输运特性。