Advancing the Understanding of Hydrologic Connectivity between Kettle Holes and Adjoining Groundwater System using a Hybrid Modelling Approach

使用混合建模方法加深对釜孔与邻近地下水系统之间水文连通性的理解

基本信息

项目摘要

The key objective of the envisaged research is to quantify and upscale the flux exchange between the groundwater and kettle holes. To that end, stable isotopes of water (18O and 2H or D) in combination with a fully integrated hydrological model (HydroGeoSphere, HGS) as well as a hybrid machine learning algorithm will be employed. The project attains the objective by taking the following four methodological steps: (1) selecting a recharge, flow-through, and discharge kettle hole type as the pilot kettle holes in the Uckermark region, Germany based on a classification provided by a stable water isotopic signature approach; in addition, the effectiveness of hydrochemistry compositions of the kettle holes and their adjacent groundwater for identification of recharge, flow-through, and discharge kettle hole types will be assessed; (2) constructing and calibrating/validating a high resolution HGS model for a local scale, namely the pilot kettle holes and extracting the flux exchange between the pilot/modelled kettle holes and their adjoining groundwater domain; (3) validating the groundwater inflow estimated using the stable water isotopic signature approach against that of calculated by the HGS model; as a result, a high skill bias correction algorithm will be applied to correct the possible systematic biases reflected in the isotopic approach-derived groundwater inflow; (4) developing meta-models for upscaling the modelled kettle hole-groundwater flux exchange to the unmodeled kettle holes.
设想的研究的主要目标是量化和扩大地下水和壶洞之间的流量交换。为此,将采用水的稳定同位素(18O和2H或D)与完全集成的水文模型(水文地球球体,HGS)以及混合机器学习算法相结合。该项目通过以下四个方法步骤实现这一目标:(1)根据稳定水同位素特征法提供的分类,在德国Uckermark地区选择一种补给、贯通和排放壶洞类型作为试点壶洞;此外,将评估壶洞及其邻近地下水的水化学成分对识别补给、贯通和排放壶洞类型的有效性;(2)建立和校准/验证局部尺度的高分辨率HGS模型,即引水壶洞,并提取试点/模拟壶洞与其相邻地下水域之间的通量交换;(3)用稳定水同位素特征法估算的地下水入渗量与HGS模型计算的入渗量进行验证;结果,将采用高技能的偏差校正算法来校正同位素法得出的地下水入渗量可能反映的系统偏差;(4)开发元模型以提高模型壶洞的尺度--地下水通量交换到未建模的壶洞。

项目成果

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Dr.-Ing. Majid Taie Semiromi, Ph.D.其他文献

Dr.-Ing. Majid Taie Semiromi, Ph.D.的其他文献

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