So what would be the question you are asking? if you're asking how to hook a reader in your intro start with an onomatopoeia or something like: On a dark and stormy night Elle Mist sat in the corner of her room crying wondering when her parents would come home.
It only lets you know the thoughts or feelings of the narrative while the other characters you only get a hint at what there feeling
Answer:
Allusion is the answer. It's mentioning the river and what it's known for but not telling you the name of the river.
