Gaißa

The Gaißa is a river in Bavaria, southeastern Germany, which is a tributary of the Danube. It flows through the Bavarian Forest from North to South, crossing Aicha vorm Wald and joining the Danube northwest of Passau. The river reaches a length of 19.9 km; including its source river Große Ohe (not to be confused with the namesake tributary of the Ilz) which is 45.8 km long. Due to the nearby motorway, a good deal of dirt was flushed into the water from time to time.