H3Dv2.1 A0253, isopachen Zand of Bolderberg outside the Roerdalslenk

This layer represents the A0253 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本图层代表弗拉芒基底水文地质三维模型（版本2.1）中定义的A0253等厚线（isopachen）。该模型由弗拉芒政府代表弗拉芒环境署，在其与VITO签订的VLAKO管理协议框架下编制完成。