Hydrogeology — SAQ

The BD LISA (Aquifer System Limits Database) repository currently in circulation is version 3. This repository shall include the following spatial datasets: — Level 3 hydrogeological entities (local); — Elementary polygons delimiting each single stack of hydrogeological entities; — Karst zones, areas characterised as karst-based or feeding karst sources; — Movable alterite zones, polygons of extension of areas in which the presence of altered movable geological formations (saprolite) has been identified or is assumed. As well as additional information tables: — The multi-scale table comprising all hydrogeological entities mapped (levels 1, 2 and 3) — The genealogy table summarising the changes made between version 2 and version 3 of BDLISA. — The table of batteries of hydrogeological entities which associates each elemental polygon with the level 3 hydrogeological entities present under this polygon, ordering them vertically. — The lithology table that associates each hydrogeological entity with the rock nature(s) that characterise it.当前流通的BD LISA（含水层系统边界数据库，Aquifer System Limits Database）存储库为第3版。 该存储库包含以下空间数据集： —— 三级水文地质实体（局域尺度）； —— 用于界定每一组水文地质实体堆叠范围的基础多边形； —— 岩溶区域，即基于岩溶发育或补给岩溶水源的区域； —— 可移动风化带，即已探明或推测存在可移动风化地质构造（腐岩，saprolite）的区域扩展多边形。 此外还包含以下附加信息表： —— 多尺度表：收录所有已测绘的水文地质实体（1、2、3级）； —— 谱系表：汇总BD LISA第2版与第3版之间的版本变更内容； —— 水文地质实体堆叠表：将每个基础多边形与其下方覆盖的三级水文地质实体相关联，并按垂直顺序排列； —— 岩性表：将每个水文地质实体与其特征岩石性质相关联。