H3Dv2.1 A0440, isopachs Tongeren Aquitard

This layer represents the A0440 isopachen, 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本图层对应弗拉芒基底水文地质三维模型（版本2.1）中定义的A0440号等厚层（isopachen）。该水文地质三维模型以弗拉芒环境署的名义，在弗拉芒政府与VITO签订的VLAKO管理协议框架下编制完成。