upper water level的用法和樣例：
例句
- A dock construction built on a river bank causes naturally the water level upstr eam to rise and influ-ences the local flow pattern.
河岸碼頭建築物勢必導致其上游水位壅高及對碼頭附近水流流態產生影響。 - The upper Mississippi River in Missouri and Illinois is about to hit its high point.
位於密蘇里州和伊利諾斯州的密西西比河上游水位將達到頂點。
