hydrographic control point

例句：

1. 1. The hydrographic control point is crucial for navigation.
   水文控制点对于导航至关重要。
2. 2. The team established a hydrographic control point to monitor the river's flow.
   团队建立了一个水文控制点来监测河流的流量。
3. 3. The hydrographic control point provides valuable data for flood forecasting.
   水文控制点为洪水预报提供了宝贵的数据。