A map that represents the physical features of water bodies, including their depth, flow, and surrounding geographical elements.

जलविज्ञान मानचित्र (Jalvijnan Maanchitra)

English Usage: The hydrographical map was essential for understanding the navigation routes in the river.

Hindi Usage: जलविज्ञान मानचित्र नदी में नेविगेशन रूट्स को समझने के लिए आवश्यक था।