WMS — Groundwater dynamics

The representation of groundwater dynamics includes different layers: Support points, hydroisohypses, hydroisohypses in the loess area, hydroisohypses of uncertain course, groundwater influence by mining and groundwater fluid level. The data is based on the groundwater assessment carried out throughout Saxony in spring 2016 (April) in the upper main aquifer (pore aquifer). The elevations of the hydroisohyps refer to meters above NHN. In addition, hydroisohypses can be displayed in the loess area, whereby the thickness of the loess layer may vary within an area. Since, despite the widespread spread, it is not safe to determine whether these loess layers form a contiguous aquifer or only local overlaps, the discharge behaviour cannot be clearly recalculated. These resulting uncertainties should be taken into account when considering the hydroisohypses in the loess area. The identification of hydroisohyps with an uncertain course exists in the areas of the Vorerzgebirgssenke and in the loess area or where plausibility testing due to low measurement point density is only possible to a limited extent. The support points used for the creation of the groundwater surface are also available. These represent the measured values of the groundwater level in meters above NHN as part of the 2016 reporting date. The groundwater corridors in the loose rock and loess areas, as well as the Vorerzgebirgssenke, are indicated in meters below terrain with a resolution of 50 m x 50 m. The presentation of the groundwater flux levels is based on the hydroisohyps of the reporting date measurement in spring 2016. In this respect, the corridor distances were created by cutting the grid of the terrain top edge (DGM) with the previously determined grid of groundwater dynamics. The areas affected by mining have disturbed groundwater dynamics or complex hydrodynamic conditions, so that a representation of hydroisohyps and groundwater flux levels with sufficient accuracy cannot be guaranteed. The representations of hydroisohyps and groundwater flux levels reflect the equilibrium state of groundwater conditions for the reporting date measurement in spring 2016. However, the groundwater surface is in constant change, so a map representation can always only reflect the situation at a certain point in time. In order to be able to make a more comprehensive and precise statement about the groundwater conditions at a certain point, it is also advisable to look at the measured values or gear line sequences of surrounding groundwater measuring stations. The map is progressively updated and depending on the progress of knowledge. The LfULG is happy to receive any information about this at any time.地下水动力学表征包含多个层级：支撑点、地下水等水位线（hydroisohypses）、黄土区地下水等水位线、不确定走向的地下水等水位线、采矿扰动地下水状况以及地下水位。本数据集基于2016年春季（4月）对萨克森州全境上层主要含水层（孔隙含水层）开展的地下水评估工作。地下水等水位线的高程以德国正常高基准面（NHN）为基准，单位为米。此外，黄土区可绘制地下水等水位线，但区域内黄土层厚度可能存在差异。由于尽管分布广泛，但无法确定这些黄土层是否构成连续含水层，抑或仅为局部叠置，因此无法明确推演其径流特征，此类不确定性在分析黄土区地下水等水位线时需予以考量。存在不确定走向的地下水等水位线的区域包括前厄尔士山坳（Vorerzgebirgssenke）、黄土区，以及因测量点密度过低而仅能有限开展合理性检验（plausibility testing）的区域。 用于生成地下水面的支撑点数据同样可获取。此类支撑点对应2016年报告基准日测得的地下水位数值，单位为相对于NHN的米数。 松散岩类与黄土区以及前厄尔士山坳内的地下水廊道以距地表下米数为单位进行标注，空间分辨率为50米×50米。 地下水通量等级的可视化成果基于2016年春季报告基准日测得的地下水等水位线生成。 就此而言，地下水廊道间距是通过将地形顶格网（数字地形模型，DGM）与此前确定的地下水动力学格网进行裁切得到的。 受采矿活动影响的区域存在地下水动力学扰动或复杂水动力条件，因此无法保证地下水等水位线与地下水通量等级的可视化成果具备足够精度。 地下水等水位线与地下水通量等级的可视化成果反映了2016年春季报告基准日地下水状况的平衡状态。 但地下水面始终处于动态变化之中，因此地图可视化成果仅能反映特定时间点的地下水状况。 若要对特定时间点的地下水状况作出更全面精准的研判，建议同时参考周边地下水监测站的实测值或监测线序列数据。 本地图将随认知进展逐步更新完善。 萨克森州环境、农业与地质局（LfULG）随时欢迎各界提供相关信息。