Regional ecological continuity (cer_obstacle_p_fr32) — Major barriers to flow — SRADDET Hauts-de-France 2020

Major drainage barriers are water-related structures that cause changes in surface water flow. They disrupt the flow of aquatic materials and species and ecological continuity. A CER geostandard was established by the CNIG in 2018 for harmonisation (cer_obstacle) http://cnig.gouv.fr/wp-content/uploads/2018/10/181001_Standard_CNIG_CER_v2018.pdf This data is the fixed representation on the date of the vote of the SRADDET (approved by prefectoral decree on 4 August 2020) Consider consulting the recommendations for use in resources https://sig.hautsdefrance.fr/ext/opendata/Sraddet2020/precisions_biodiversite.pdf大型排水阻水设施（Major drainage barriers）指会改变地表水流的涉水构筑物。此类设施会干扰水生物质、物种的迁移，并破坏生态连续性。 2018年，法国国家地理与森林信息委员会（CNIG）制定了CER地理标准（CER geostandard）以实现规范统一，该标准代号为cer_obstacle，相关标准文档可查阅：http://cnig.gouv.fr/wp-content/uploads/2018/10/181001_Standard_CNIG_CER_v2018.pdf 本数据集为SRADDET表决当日的固定版本数据，该数据集已于2020年8月4日经省府政令批准。 建议查阅相关使用指南以了解使用规范：https://sig.hautsdefrance.fr/ext/opendata/Sraddet2020/precisions_biodiversite.pdf