hydrolocator

例句：

1. 1. The hydrolocator was used to monitor the river's flow during flood season.
   水文观测者被用来在洪水季节监测河流的流量。
2. 2.The hydrolocator collected data on the local climate and weather patterns.
   水文观测者收集了关于当地气候和天气模式的数据。
3. 3.The hydrolocator helped in predicting the flood levels before they reached dangerous levels.
   水文观测者帮助预测了洪水水位，以避免它们达到危险水平。