New groundwater formation Dry period (1971-1973)

Groundwater regeneration from precipitation is a residual component of the water balance. It is described as the proportion of precipitation height reduced by actual evaporation and rapid runoff component. The groundwater regeneration rates shown in the map are the result of a modeling with qualitatively different input data. In each case, the best data base available throughout Bavaria was used in order to be able to make consistent statements across the board. Therefore, data sets from different scale ranges were used jointly for modelling. Examples include, on the one hand, the highly generalised survey map in the scale of 1:1.000.000 and on the other hand the detailed digital terrain model in a 50 m grid. Furthermore, data was worked on, which in some cases can also show significant regional differences in quality (e.g. groundwater level, regionalised station data of the different climate parameters). Therefore, the map sheet “Aquitainment of the Dry Period (1971-1973)” is a large-scale overview and allows a description of the regional conditions appropriate to the scale of 1:500.000. The use of the grid-related individual values for detail statements is not permitted methodically.降水补给地下水是水文水平衡（water balance）的剩余组分。该指标可定义为降水水深扣除实际蒸发量与快速径流分量后的剩余占比。 本地图展示的地下水补给速率，是采用性质各异的输入数据开展数值模拟的结果。本次模拟全程采用巴伐利亚州境内可获取的最优数据集，以确保能够生成具有全域一致性的分析结论。因此，本次建模联合使用了不同空间尺度范围的数据集，举例而言，一方面包括比例尺为1:100万的高度概化调查地图，另一方面则包括分辨率为50米格网的精细数字地形模型（Digital Terrain Model）。此外，本次研究还处理了部分质量存在显著区域差异的数据集——例如地下水位数据、不同气候参数的区域化台站数据。 因此，《干旱期地下水补给（1971-1973）》图幅属于大尺度概览图，可用于描述匹配1:50万比例尺的区域水文条件。依据方法学规范，不得直接采用该格网关联的单值开展细节性表述。