This paper presents the influence on the levels from the well caption front Gherăeşti-Bacău, located on the right side of the Bistrița River, through the construction, on the right shore, of a 2.25 km long perimetral embankment, and a recreational lake with a surface of 3.18 hectares and average depth of 5.5 m (Figure 1). Through numerical modelling, using the modelling software of Visual Modflow aquifer, the influence on the hydrostatic level from drilled wells was determined, as well as the influence on the phreatic flow through the making of the recreational lake, which captures a part of the underground water. The use of the mathematical model allows the determination of the optimal parameters for an extraction from the aquifer known through classical methods. To achieve the mathematical model the method of filtration resistances was used, which is applied in the case of a sudden curvature of the streamlines (in the proximity of the imperfect permeable/impervious borders: channels, drains, well systems, screens), hence they are applied during pressure/level drops. This method allows the following equalizations: the imperfect wells can be considered as perfect; the lines of perfect/imperfect wells can be considered as perfect trenches (channels) with a flow equal to the sum of all wells; a stratified aquifer (up to 3 layers) can be equivaled with a homogenous one. Aspects regarding the flow were taken into consideration: with a free level or under pressure, the dimensioning of the model, the initial conditions of the aquifer layer, the lithostratigraphic characteristics, homogeneity, anisotropy, the transfer mechanisms in the domain’s interior, the studied hydrogeological structure was schematized, having done a monolayer model. The calibration of the model consists of adjusting, in reasonable conditions, of the domain data (the permeabilities), boundary conditions, so that through the running of the model and obtaining the corresponding piezometric lines and the obtained data will overlap the levels of the existing drillings.

中文翻译：

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路堤和休闲湖对钻井抢占前沿的影响

本文介绍了位于比斯特里察河右侧的 Gherăeşti-Bacău 井标题前缘，通过在右岸修建一条 2.25 公里长的周边堤坝和一个休闲湖对水位的影响。面积 3.18 公顷，平均深度 5.5 m（图 1）。通过数值模拟，使用 Visual Modflow 含水层建模软件，确定了钻井对静水水位的影响，以及通过建造休闲湖（捕获部分地下水）对潜水流的影响。 。使用数学模型可以确定通过经典方法从已知的含水层中提取的最佳参数。为了实现数学模型，使用了过滤阻力的方法，该方法应用于流线突然弯曲的情况（在不完美的渗透/不渗透边界附近：渠道、排水沟、井系统、筛网），因此它们在压力/液位下降期间应用。该方法允许以下均衡：不完美的井可以被认为是完美的；完美/不完美井的线路可以被视为完美的沟渠（渠道），其流量等于所有井的总和；分层含水层（最多 3 层）可等同于均质含水层。考虑了有关流动的方面：自由水平或压力下、模型的尺寸、含水层的初始条件、岩石地层特征、均匀性、各向异性、域内部的传递机制、研究的水文地质完成了单层模型，结构被示意化。模型的标定包括在合理的条件下调整域数据（渗透率）、边界条件，以便通过模型的运行获得相应的测压线，并且获得的数据将与现有的水平重叠。钻孔。