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An Improved Approach for Assigning Pumping Rates to Heterogeneous Aquifer Models

机译：一种为非均质含水层模型分配抽水率的改进方法

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摘要

A common assumption of ground water models formulated using a block-centered finite-difference method is that a well is located at the center of a cell regardless of its actual location. Due to this assumption, errors are introduced in the spatial distribution of simulated heads. This paper presents an alternative approach for assigning the pumping rates of wells that are located off cell centers. This approach consists of assigning the pumping rate not only to the cell in which the well is located but also to adjacent cells, taking into account the length of the well screen, the hydraulic conductivity, and the distance from the well to the center of its cell. The advantage of this alternative approach over the conventional one is illustrated with a test problem of a synthetic aquifer. Statistical measures of error indicate a much better model fit when pumping rates of wells are distributed over several cells.
机译：使用以块为中心的有限差分法制定的地下水模型的常见假设是，无论井的实际位置如何，孔都位于单元的中心。由于这种假设，在模拟磁头的空间分布中会引入误差。本文提出了另一种方法来分配位于细胞中心以外的井的抽水速率。该方法包括不仅考虑到井所在单元，还考虑相邻筛网的长度，水力传导率以及从井到井中心的距离，来分配抽水速率。细胞。通过合成含水层的测试问题说明了这种替代方法相对于常规方法的优势。统计的误差度量表明，当井的抽水速率分布在多个单元上时，模型拟合效果更好。

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