Surface water table levels in 2015,2014,2013,2012,2011,2005 and 2007 in Poitou-Charentes (surface)

This map illustrates, through the operation of the daily surveys of relevant piezometric stations (selection of 44 reference piezometers established in collaboration with the BRGM), the average level of surface water in the reference month (see date of revision) compared to the average monthly levels of the same table for the same months of previous years (statistics based on historicals most initiated in the early 1990s).本地图通过与法国地质矿业研究局（BRGM）合作设立的44座参考测压站（piezometric station）的日常监测作业，展示了参考月份（详见修订日期）的地表水平均水位，并将其与同一份历史表格中历年同期同月的月均水位进行对比。本次对比所依托的统计数据，基于20世纪90年代初起始的历史观测记录。