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解析模型是分析潜水含水层抽水试验的最广泛使用的工具.抽水试验过程中的地下水流在潜水面附近是高度非线性的.由于对排水和降深过程的简化,这些解析模型不能充分地描述潜水含水层中的非线性水流.此外,这些模型假定含水层是均质的,而实际的含水层本质上都是非均质的.最近出现的水力层析法是一种经济有效的刻画含水层水力特性参数空间分布的方法.水力层析法采用数值模拟的方法去熔合多个在不同地点进行的抽水试验的数据去更详细地刻画含水层水力特性参数.在这项研究中,我们扩展水力层析法的概念到潜水含水层.为了准确地描述水力层析调查过程中的潜水含水层的地下水流,本文采用基于混合形式的Richards方程的三维饱和-非饱和流模型.利用饱和以及非饱和带的水头变化观测数据,连续线性估计法被采用来估算渗透系数,贮水率,以及土壤水分模型参数的空间变化.本文用敏感度分析探讨了水头和不同水力特性参数之间的关系,然后用一个人工合成的区域规模的三维潜水含水层去测试水力层析法.测试显示该方法能有效地地刻画潜水含水层水力特性的时空变化.水力层析法能够刻画饱和以及非饱和带的渗透系数,但是对贮水率刻画局限于饱和带,对土壤水分模型参数的刻画局限于非饱和带.本文对水力层析法对潜水含水层的应用的其他局限和潜在的改进也进行了讨论.
The analytical model is the most widely used tool for analyzing pumping tests of submerged aquifers. The groundwater flow during pumping tests is highly non-linear near the surface of the submerges and these analytical models can not adequately be described due to the simplification of the drainage and drawdown processes In addition, these models assume that the aquifers are homogeneous and that the actual aquifers are intrinsically heterogeneous, and that the recent emergence of hydraulics is a cost-effective method of characterizing aquifers Methods for Spatial Distribution of Hydraulic Parameters Hydrodynamic Chromatography The numerical simulation method is used to fuse data from multiple pumping tests at different locations to characterize hydraulic parameters of aquifers in more detail. In this study, we expanded the hydraulic In order to accurately describe the groundwater flow in submerged aquifers during the hydrographic investigation, a three-dimensional saturated-unsaturated flow model based on the Richards equation in mixed form is used in this paper.Using both saturated and unsaturated Band head changes observed data, continuous linear estimation method is used to estimate the permeability coefficient, water storage rate, and soil moisture The spatial variability of the model parameters.This paper discusses the relationship between water head and different hydraulic parameters by sensitivity analysis and then uses a synthetic three-dimensional submarine aquifer to test the hydro-chromatography.The results show that the method is effective The temporal and spatial variations of the hydraulic characteristics of submarine aquifers are described.Hydrograms can characterize the permeability coefficients of saturated and unsaturated zones, but the water storage rate is limited to the saturated zone, and the description of the soil moisture model parameters is limited to the unsaturated zone This article also discusses other limitations and potential improvements in the application of hydraulics to submersible aquifers.