H3Dv2.1 A0434 preventing clay sand of Alden Biesen

This layer gives the limits of prevention of A0434, as defined in the hydrogeological 3D model of the Flemish substrate – version 2.1. The hydrogeological 3D model was drawn up in the framework of the Flemish Government’s management agreement with VITO, known as VLAKO, on behalf of the Flemish Environmental Agency本图层明确了A0434的防控限值，该限值由佛兰德斯基底水文地质三维模型（hydrogeological 3D model），版本2.1所定义。该水文地质三维模型由佛兰德斯环境署代表佛兰芒政府，在其与VITO签订的名为VLAKO的管理协议框架下编制完成。