50.454335 6.991169 50.457275 6.991995 50.454335 6.991169 50.457275 6.991995 50.454335 6.991169 50.454533 6.991257 50.454764 6.991365 50.454969 6.991405 50.455265 6.991421 50.455557 6.991413 50.455807 6.991428 50.455929 6.991405 50.456123 6.991361 50.456351 6.991354 50.456539 6.991390 50.456719 6.991474 50.456931 6.991641 50.457102 6.991817 50.457210 6.991934 50.457275 6.991995 158992 Entwicklung Quellen und Quellbäche Gewässerkundliches Flächenverzeichnis