Direct download service (WFS) for the dataset: Classified rivers - List 2 - on the Adour-Garonne basin

Since 1 January 2014, the old classifications ‘reserved watercourses’ adopted pursuant to the Energy Act of 1980 and ‘watercourses classified as migratory’ adopted pursuant to Article L.432-6 of the Environment Code have lapsed.

The Law on water of 31 December 2006 introduced two new types of classification which replace those old classifications by making it possible to extend their application to all structures hindering ecological continuity.

Article L.214-17-I of the Environment Code and its implementing articles R.214-107 to 110 of the Environment Code define these classifications:

List 1: These are rivers on which no new works can be authorised or granted if they hinder ecological continuity.

List 2: These are rivers on which it is necessary to ensure the adequate transport of sediments and/or the circulation of migratory fish.

In the Adour-Garonne basin, the list of watercourses referred to in point I(1) of Article L. 214-17 of the Environment Code was drawn up by prefectural order of 7 October 2013.

This dataset is a graphical representation of this list 1. From a legal point of view, only the literal list of watercourses defined in the annex to the Order is authentic.

This dataset is compatible with the BDCarthage 2013 repository.

For the formulations in the prefectural order of type "Watercourse X and its tributaries", the selected watercourses are those of the BDCarthage 2008 having a toponym and attached to the sub-watershed in question.

Description of the fields:

-Hydro_Code: Tank (8) hydrograpical code of the watercourse

-CodeSegHydroThematic Char (7); CodeSegHydroThematic = Basin code (05) + 2 (List 2) + increment (after sorting by increasing hydro code and decreasing downstream PK) – Primary key

-Code_L2Arr Tank (10) Index 2; Section code as presented in the text of the Order

-Pk_Amont Float ;according to bd carthage 2013

-Pk_Aval Float; according to bd carthage 2013

-X_Amont Float ;Lambert 93

-Y_Amont Float; Lambert 93

-X_Aval Float; Lambert 93

-Y_Aval Float; Lambert 93

-libtroncon Char (254); name of the aggregated section as set out in the Order

-ESP_AMPHI Char (50); Targeted amphihaline species

-ESP_HOLO Char (50); Indicative holobiotic species

-Stake_SEDI Char (20); Normal Issue / Strong Issue (ranking criterion)

-Obs_Limit Char (254); Observations on the limits of the section (e.g. uphill or downhill) – this field is included in the Order – May be assimilated to the field ‘Commentary on the ecological continuity classification’ of the ecological continuity classification table of the benchmark.