the scientific study of the typical features of oceans, lakes, and rivers, and the making of maps to represent them

The father of modern hydrography, Captain Cook, began his surveys around Quebec. 现代水文学之父库克船长在魁北克开始他的勘测工作。

This department is responsible for fisheries management, oceanography, and hydrography.

the typical features of the oceans, lakes, and rivers in a particular region

The region's natural hydrography has already been highly modified by the building work. 建筑工程已经严重改变了该地区的自然水文状况。

The government is approving the destruction of sites which are highly valuable, and representative of our hydrography.