Search
The Mooshauser Weir is currently impassable for aquatic organisms such as fish or microorganisms moving along the river bed. Due to local conditions, the construction of a ramp is not possible. The passage is therefore made by a fish ladder. It runs along the bank next to the weir and connects the upper and lower water. Different variants, such as a near-natural bypass channel or a technical fish ladder are being investigated. Structural, hydraulic, ecological and economic criteria are compared for the different variants. The measure is part of the project Agile Iller.
The aim is to achieve good ecological status or, in the case of heavily modified water bodies, good ecological potential in accordance with the Water Resources Act (§ 27 WHG). The status of the habitat for aquatic organisms is to be improved by relocating individual sections of the bank and installing structural elements. In the first step, the existing bank will be removed, the river bed widened and the accompanying bank path relocated. The Iller will be created space for development.
The Eggstätt-Hemhofer-Lake District was designated in 1939 as one of the first Bavarian nature reserves. The Seeoner Seen nature reserve followed in 1985. Even then it was clear that both protected areas were too small for themselves to ensure the long-term survival of numerous animal and plant species. The Ischler Achen with its tributary waters and adjacent habitats is being developed as the core structure of the biotope network. A network of ecologically upgraded areas is to provide additional habitat for endangered species throughout the lakes' catchment area.
Between 1999 and 2005 the municipality of Dirlewang experienced 6 greater flood events, what caused damaged amounting millions. To prevent further damage a flood control reservoir was built. In the course of this the district of Schwaben also restored a 3 km long section of the Mindel. In this former canalized area, the Mindel can develop into a near-natural watercouse again.
The water authority Rosenheim has to protect the riverbank of the Glonn at the end of the town Glonn. In order to upgrade the water ecologically in sense of the europeam water framework directive only bioengineering techniques were used. To prevent erosion heavy-type wipped fascines were used and willows have been planted. Furthermore the riverbank has been flattened.
The originally natural gradient is largely removed as a consequence of the straightening of the Iller by the erected transverse structures.This created stretches of water with a low gradient and the pre-alpine flowing water properties were lost. Through the construction of side arms, an attempt is being made to create an extended watercourse habitat with natural bed layers and high habitat function. It enables an approximation to the natural, branched course of the watercourse with its numerous side channels. The measure is part of the project Agile Iller.
The water authority improved the ecological situation of the Attel b creating a permanently flowed side arm, with a altering shore line and slope angles. Natural structure elements implemented in the riverbed produce flow diversity and improve the habitat quality for fish. The created retention area contributes to reduce flood peaks.
The ground thresholds Upper and Lower Buxheim are currently impassable for aquatic organisms, such as fish or micro-organisms moving on the ground. By converting the concrete sleepers into shallow ramps, the passability for aquatic organisms is achieved. A sole ramp provides passability over the entire width of the watercourse. The watercourse section is extended and creates new valuable habitat. The measures are part of the project Agile Iller.
Between Ottobeuren and Westerheim the Günz has never been regulated and therefore a good example for a natural river course. In order to maintain or improve the good ecological status the water authority Kempten has set up a river development plan. Priority is given to the self-dynamic development of the Westliche Günz and its banks.
The aim is to achieve good ecological status or, in the case of heavily modified water bodies, good ecological potential in accordance with the Water Resources Act (§ 27 WHG). The status of the habitat for aquatic organisms is to be improved by relocating individual sections of the bank and installing structural elements. In the first step, the existing bank will be removed, the river bed widened and the accompanying bank path relocated. The Iller will be created space for development.