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WASSERKRAFTANLAGE SCHNEIZLREUTH an DER SAALACH Einreichprojekt UMWELTGUTACHTEN PETZ OG TECHNISCHES BÜRO FÜR ÖKOLOGIE UND UMWELTSCHUTZ DR. WOLFGANG PETZ MAG. DR. REGINA PETZ-GLECHNER Allgemein beeidete und gerichtlich zertifizierte Sachverständige für Fischerei und Fließgewässerökologie WASSERKRAFTANLAGE SCHNEIZLREUTH AN DER SAALACH GEWÄSSERÖKOLOGISCHE BEGLEITPLANUNG Im Auftrag von Wasserkraft Schneizlreuth GmbH & Co. KG Untereggerhausen 2 D-83355 Grabenstätt Auftragnehmer & Projektleitung TB Umweltgutachten Petz OG Bearbeiter Generelles Projekt Dr. Wolfgang Petz Dr. Regina Petz-Glechner Mag. Stefan Achleitner Markus Walkner, MSc Mag. Philipp Feldmüller Mag. Markus Kuhn Teil Makrozoobenthos & Algen ARGE Ökologie, Wien Dr. Karl Panek Mag. Wolfgang Siegl Einreichprojekt – Teil C 1 Neumarkt a. W., Juni 2019 Neufahrn 74, A-5202 Neumarkt am Wallersee Auf der Haiden 120, A-5280 Braunau/Inn Tel. 06216-20158-0, Fax DW -22 e-mail: [email protected] mobil 0676-84 24 09 100 www.umweltgutachten.at Wasserkraftanlage Schneizlreuth an der Saalach - Gewässerökologische Begleitplanung 2 TB Umweltgutachten Petz OG Wasserkraftanlage Schneizlreuth an der Saalach - Gewässerökologische Begleitplanung Inhaltsverzeichnis 1. Einleitung ......................................................................................................................... 7 2. Beschreibung des Projektes ............................................................................................. 7 3. Untersuchungsgebiet ........................................................................................................ 8 3.1. Bewirtschaftungsplan 2016-2021 (Deutschland) .......................................................11 3.2. Nationaler Gewässerbewirtschaftungsplan 2015 (Österreich) ...................................15 4. Beschreibung der Gewässerstrecke ................................................................................20 4.1. Ökomorphologie ........................................................................................................20 4.2. Hydromorphologischer Ist-Zustand ...........................................................................28 4.3. Strukturgütekartierung...............................................................................................48 4.3.2. FWK 1_F650 ......................................................................................................48 4.3.1. FWK 1_F651 ......................................................................................................50 4.4. Mesohabitatkartierung...............................................................................................52 4.4.1. Einleitung ............................................................................................................52 4.4.2. Methodik .............................................................................................................52 4.4.3. Ergebnisse .........................................................................................................53 4.4.3.1. Abschnitt 1 ...................................................................................................53 4.4.3.2. Abschnitt 2 ...................................................................................................60 4.4.3.3. Abschnitt 3 ...................................................................................................68 4.4.3.4. Abschnitt 4 ...................................................................................................75 4.4.4. Diskussion ..........................................................................................................82 4.5. Habitatverfügbarkeit ..................................................................................................84 4.5.1. Strecke 1 ............................................................................................................87 4.5.2. Strecke 2 ............................................................................................................92 4.5.3. Strecke 3 ............................................................................................................97 4.5.4. Strecke 4 .......................................................................................................... 101 4.5.5. Fazit ................................................................................................................. 106 5. Benthische Lebensgemeinschaften ............................................................................... 107 5.1. Methodik ................................................................................................................. 107 5.2. Ergebnisse .............................................................................................................. 108 5.2.1. Stelle 1 – Referenz oberhalb der geplanten Fassung ....................................... 108 5.2.2. Stelle 2 – unterhalb geplanter Fassung, oberhalb ARA .................................... 115 5.2.3. Stelle 3 – mittlerer Bereich der geplanten Ausleitung, unterhalb ARA ............... 122 TB Umweltgutachten Petz OG 3 Wasserkraftanlage Schneizlreuth an der Saalach - Gewässerökologische Begleitplanung 5.2.3. Stelle 4 – unterer Bereich der geplanten Ausleitung ......................................... 129 5.3. Diskussion .............................................................................................................. 136 5.3.1. Stelle 1 – Referenz oberhalb der geplanten Fassung ....................................... 136 5.3.2. Stelle 2 – unterhalb geplanter Fassung, oberhalb ARA .................................... 137 5.3.3. Stelle 3 – mittlerer Bereich der geplanten Ausleitung, unterhalb ARA ............... 138 5.3.4. Stelle 4 – unterer Bereich der geplanten Ausleitung ......................................... 140 5.3.5. Längsvergleich der Untersuchungsstellen ...................................................... 141 6. Fischfauna ..................................................................................................................... 143 6.1. Methodik ................................................................................................................. 143 6.1.1. Fischbestandsaufnahme ................................................................................... 143 6.1.2. Fischökologische Bewertung ............................................................................ 144 6.1.2.1. Bewertung nach fiBS .................................................................................. 144 6.1.2.2. Bewertung nach FIA ................................................................................... 144 6.2. Beschreibung der Befischungsstrecke .................................................................... 146 6.3. Ergebnisse .............................................................................................................. 149 6.3.1. Fischarten......................................................................................................... 149 6.3.2. Fischbestand 2016 ........................................................................................... 150 6.3.3. Fischbestand 2018 ........................................................................................... 153 6.4. Fischökologischer Zustand nach fiBS ..................................................................... 157 6.4.1. Grundlagen der Bewertung ............................................................................... 157 6.4.1.1. Referenzzönose ......................................................................................... 157 6.4.1.2. Fangzahlen ................................................................................................ 158 6.4.1.3. Abgrenzung der Altersklasse 0+ ................................................................ 159 6.4.1.4. Dummies .................................................................................................... 161 6.4.2. Zustandsbewertung .......................................................................................... 162 6.5. Fischökologischer Zustand nach FIA ...................................................................... 163 6.5.1. Fischartenleitbild............................................................................................... 163 6.5.2. Zustandsbewertungen ...................................................................................... 165 6.6. Diskussion .............................................................................................................. 167 7. Zusammenfassende Bewertung .................................................................................... 170 7.1. Grundlagen ............................................................................................................. 170 7.2. Biologische Qualitätskomponenten ......................................................................... 171 7.2.1. OWK 301330016 .............................................................................................. 171 7.2.2. OWK 301330015 / FWK 1_F650 ...................................................................... 172 4 TB Umweltgutachten Petz OG Wasserkraftanlage Schneizlreuth an der Saalach - Gewässerökologische Begleitplanung 7.2.3. FWK 1_F651 .................................................................................................... 173 7.3. Hydromorphologische Qualitätskomponenten ......................................................... 175 7.4. Zusammenfassung ................................................................................................
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