Sections downstream and upstream of the reference sections

The database covers watercourses upstream and downstream of the reference sections of watercourses and/or lakes, as defined in the Decree on water management plans for river basin districts of the Danube and the Adriatic Sea (Official Gazette of the Republic of Slovenia, No 67/16). Reference stretches are sections of watercourses and shores of lakes where reference points are sites with only very small changes in the hydromorphological, physico-chemical and biological quality elements of the ecological status of surface waters due to human activity and meet the definitions for very good ecological status in accordance with the regulation governing the status of surface waters. Reference sections of watercourses include the collection Reference sections of watercourses. Reference sections of the lake coast include the collection Reference Sections on Lakes. In accordance with 4 (5). The Decree on water management plans for river basin districts of the Danube and the Adriatic Sea (Official Gazette of the Republic of Slovenia, No 67/16) contains the digital data layer for the level of criterion 1: 25,000 in the national coordinate system defined watercourses upstream of the reference sections and sections of watercourses downstream of the reference sections or downstream of the lake on which the reference sections are defined, to the downstream boundary of the fish type into which the reference section or water flow at the outflow from the lake is classified. Data on these sections and their geographical boundaries shall form part of the information system of the environment and include in particular: — section identification number; — the code and name of the surface water body where the section is located; — fish type in accordance with the regulation governing the monitoring of the status of surface waters into which the reference section is classified; — the length of the section of the watercourse downstream of the reference section or downstream of the lake, where reference stretches are defined to the downstream boundary of the fish type into which the reference section(s) at the outflow from the lake is classified; and — date of designation of the section.本数据库涵盖《多瑙河与亚得里亚海流域区水资源管理计划法令》（斯洛文尼亚共和国官方公报第67/16号）中定义的河道及湖泊参考河段的上下游水域。 参考河段指河道段及湖岸区域，其中的参考点位受人类活动影响极小，地表水生态状态的水文形态、理化及生物学质量要素仅发生极细微变化，且符合《地表水状态监管条例》中“极佳生态状态”的定义。 河道参考河段包含数据集“河道参考河段”；湖岸参考河段则包含数据集“湖泊参考河段”。 依据《多瑙河与亚得里亚海流域区水资源管理计划法令》（斯洛文尼亚共和国官方公报第67/16号）第4条第5款，该法令包含符合国家坐标系标准1:25000比例尺的数字数据图层，覆盖范围为参考河段上游的河道，以及参考河段下游河道或参考河段所在湖泊的下游水域，直至参考河段或湖泊出水口水流所归属的鱼类群落区下游边界。 上述河段及其地理边界数据将纳入环境信息系统，具体包含以下内容： — 河段识别编号； — 该河段所属地表水水体的代码与名称； — 参考河段所归属的、依据《地表水状态监测监管条例》划定的鱼类群落类型； — 参考河段下游河道或参考河段所在湖泊下游水域的长度，该水域范围延伸至参考河段（或湖泊出水口水流所归属的）鱼类群落区下游边界； — 河段划定日期。