Formation, actual state and development perspectives of selected Enns old arms between Palten estuary and Gesäuse entrance

When the measures of enns regulation in the sixties of the 19th century in the area of Admont (Steiermark) transformed the meandering Enns into a straightened river with clearly stretched lines, they left behind a series of riverbed relics. These old arms, cut off from the new riverbed, have evolved over the years into valuable biotopes and retreats of rare and endangered flora and fauna. This work deals with seven of these old arms and their surroundings (Mödring, Admont Steam Saw, Admont East, Admont New America, Scheiblteich and Narrenteich, Squad Altarm and Grabner Au). On the one hand, it sheds light on her history and development since its creation. On the other hand, it represents the actual state of natural spatial parameters (geology, soil conditions, hydrology, endangered flora and fauna) and anthropogenic use. In a third step, conceptual ideas for the future of these research areas will be presented. Ecological parameters are taken into account in the same way as those of hydraulics or utilisation claims through tourism and recreation. The goal is the sustainable development of a river landscape with a dynamic balance between the river, its floodplains and the surrounding cultural landscape.19世纪60年代，奥地利施蒂利亚州（Steiermark）阿德蒙特（Admont）地区实施的恩斯河（Enns）整治工程，将原本蜿蜒曲折的河道改造为线条规整的平直河道，遗留下来多处古河床遗迹。这些与新河道相分离的旧河汊，历经多年演变，现已成为珍稀濒危动植物的珍贵生境与庇护场所。 本研究聚焦其中7处旧河汊及其周边区域（分别为默德林（Mödring）、阿德蒙特蒸汽锯木厂河汊、阿德蒙特东河汊、阿德蒙特新美洲河汊、沙伊布池塘（Scheiblteich）、纳伦滕池塘（Narrenteich）、旧主河汊（Squad Altarm）以及格拉布纳河畔湿地（Grabner Au））。研究内容主要包含三部分：其一，梳理各区域自形成以来的历史沿革与演化历程；其二，阐明当前自然空间参数（地质、土壤条件、水文状况、珍稀濒危动植物）及人为利用现状；其三，提出针对这些研究区域未来发展的概念性构想。研究同时兼顾生态参数、水力学参数，以及旅游休闲活动带来的利用诉求，最终目标是实现河流景观的可持续发展，达成河道、河漫滩与周边人文景观之间的动态平衡。