This is the 7010th most frequent German word.
flusswassers
"Flusswassers" means "river water" in English.
Here, 'Flusswassers' is used in the genitive case to show possession and provide a descriptive character to 'plätschern'.
Das Flusswassers plätschern war beruhigend.
The splashing of the river's water was soothing.
Here, 'Flusswassers' is used to describe the specific water being discussed, emphasizing its origin or type.
Die Qualität des Flusswassers ist entscheidend für das Ökosystem.
The quality of the river's water is crucial for the ecosystem.
In this sentence, 'Flusswassers' again denotes the source of the water samples, indicating the specificity of the object.