DRASTIC parameter "A - Aquifer media" for pilot area Oder (Poland/Germany)

The Lower Oder / Odra pilot area is the only transboundary region assessing the groundwater vulnerability in GeoERA HOVER WP7 applying the DRASTIC methodology. The pilot area has an extent of about 7374 km2 and comprises parts of the groundwater catchment of the Middle and Lower Oder river of Western Poland and Eastern Germany. The considered near-surface strata consist of Cenozoic unconsolidated sediment. The assessment aims on the groundwater vulnerability to pollution of the upper useful aquifer, which is not necessarily the uppermost aquifer. The groundwater of this aquifer is primarily used for drinking water and irrigation purposes. According to Aller et al. (1987) the DRASTIC parameter "A" provides a rating with values from 1 to 10 concerning the rock material forming the aquifer for the assessment of the groundwater vulnerability.applying the DRASTIC method.

下奥得河/奥德拉河试点区域是GeoERA HOVER工作包7（GeoERA HOVER WP7）中唯一采用DRASTIC方法（DRASTIC）评估地下水脆弱性的跨界区域。该试点区域面积约7374平方千米，涵盖波兰西部与德国东部的中奥得河、下奥得河地下水流域部分区域。所涉及的近地表地层由新生代松散沉积物构成。本次评估聚焦可利用上层含水层的地下水污染脆弱性，该含水层未必是最浅层的含水层。该含水层中的地下水主要用于饮用水供应与农业灌溉。根据Aller等人1987年的研究，在采用DRASTIC方法开展地下水脆弱性评估时，表征含水层形成岩性的参数"A"的评分取值范围为1至10。