Map visualisation service (WMS) of the dataset: AZI — Crus of the atlas of flood zones in the department of Pyrénées-Atlantiques

The table L_AZI_CRUE_S_064 consists of the right-of-way polygons of flood surfaces characterised by flood frequencies: — 02: very frequent flood (annual order); — 30: 100-year flood — 03: frequent flood (return from 5 to 15 years); — 40: ten-year flood — 04: exceptional flood. Studies carried out in ten phases between 1994 and 2008. (See associated documents pdf). This map aims to inform citizens and decision-makers about the risk of flooding. It has no regulatory scope and cannot replace a planning document or a Risk Prevention Plan (RPP). Nevertheless, it allows citizens and officials, elected or administrative, to better appreciate the extent of areas that pose a significant risk of flooding or promote water sprawl. It is an information and decision-making tool. It cannot be ignored in particular when drawing up urban planning documents and explaining them.This map may be reproduced, except for commercial purposes. It traces the contours of areas with an annual flood probability of 1/10 (cru 10 years) and the probability of annual flooding is 1/100 (cru centenal). The approach used combines hydrology (the knowledge of rivers and the dynamics of their flow) and river geomorphology (analysis of the forms of the relief of the valley bottom). All available data were taken into account and analysed: studies, archives, hydrological information...Another limitation of the study is the type of flood studied: the overflow of the watercourse. Floods have not been mapped by rising water table or of the type of urban storm runoff. The presence of water in the bottom of the bowl, a doline for example, is another natural hydrological phenomenon and is therefore not carried on this map.