Becken Teichstätt Technik Und Natur – Kein Widerspruch Berichte Und Studien Band 1

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LAND OBERÖSTERREICH Hochwasserrückhalte- becken Teichstätt Technik und Natur – kein Widerspruch Berichte und Studien Band 1 (*wasserwirtschaft) Hochwasserrückhaltebecken Teichstätt Technik und Natur – kein Widerspruch Berichte und Studien Band 1 3 Inhaltsverzeichnis INHALTSVERZEICHNIS Vorworte 9 Einleitung 13 Wasserwirtschaft 16 Ein altes Siedlungsgebiet . .16 Die Hochwassergefahr . .20 Wasserkreislauf und Geologie . 20 Das Einzugsgebiet des Schwemmbaches . 21 Störung des wasserwirtschaftlichen Gleichgewichtes . 22 Wasserwirtschaftliche Rahmenverfügung Hainbach . 22 Der Abflussplan Mattig . .23 Hochwasserrückhalte- und Versickerungsbecken Teichstätt – das Projekt 25 Funktionsweise . 26 Automatische Steuerung . 28 Hydrologische Kennwerte des Schwemmbaches beim Beckenzulauf . 29 Baubeschreibung . 30 Technische Details . 36 Betriebserfahrungen seit 1991 . 36 Literatur . 38 Erinnerungen des Betriebswärters . 39 Auswirkungen auf das Ökosystem 44 Landschaftsgestaltung im Detail . 44 Vorbemerkung . 45 Pflegekonzept . 46 Zum Autor . 48 Naturschutz 50 Das Rückhaltebecken Teichstätt – NATURA 2000- und Naturschutzgebiet . 50 Natura 2000-Gebiet . 50 Naturschutzgebiet „Feuchtgebiet Teichstätt“ . 51 Zu den Autoren . 53 Fachliche Studien 54 Die Bodenverhältnisse . 54 Vorbemerkung . 54 5 Inhaltsverzeichnis Methodik . .55 Ergebnisse . 56 Bodentypen . .56 Folgeuntersuchungen im Jahr 2000 . 60 pH-Wert und Nährstoffverhältnisse . 67 Austauschbares Aluminium, Eisen und Mangan . 68 Diskussion . .68 Veränderungen zwischen den Untersuchungszeiträumen 1992–1995 und 2000 . 69 Entwicklungstendenzen . 71 Zusammenfassung und Ausblick . 72 Zum Autor . 72 Literatur . 73 Die Vegetation . 74 Ausgangsbasis . 74 Einleitung . 77 Vegetationskundliche Untersuchungen im Nordteil 1991–1995 und 2000 . 78 Vegetationskundliche Untersuchungen im Südteil . 102 Einleitung . 102 Methodik der Vegetationsaufnahme . 102 Vegetationseinheiten . 103 Vergleich der Vegetationskarten von 1991 bis 1995 und 2000 . 110 Vegetationsaufnahmen 1991–1995 und 2000 . 111 Zu den Autorinnen . 129 Literatur . 130 Tierwelt 131 Die Schnecken- und Muschelfauna . 131 Einleitung . 131 Material und Methode . 131 Ergebnisse und Diskussion . 132 Systematische Übersicht, Gefährdungsgrad und Verbreitung (Stand 2000) . 145 Zusammenfassung . 147 Zum Autor . 148 Literatur . 149 Die Libellen- und Heuschreckenfauna . 150 Einleitung . 150 Untersuchungsgebiet und Methodik . 150 Grundsee . 151 Schwemmbach . 151 Libellen (Odonata) . 152 Die einzelnen Libellenhabitate . 161 Heuschrecken (Saltatoria) . 162 Zusammenfassung . 170 Zu den Autoren . 170 Literatur . ..

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