Editing Lake Van (section)

===Bathymetry===
The first acoustic survey of Lake Van was performed in 1974.{{sfn|Wong|Degens|1978}}{{sfn|Toker|Sengör|Filiz|Demirbağ|2017|p=167}}

Kempe and Degens later identified three physiographic provinces comprising the lake: 
*a lacustrine shelf (27% of the lake) from the shore to a clear gradient change
*a steeper lacustrine slope (63%)
*a deep, relatively flat basin province (10%) in the western center of the lake.{{sfn|Kempe|Degens|1978}}

The deepest part of the lake is the Tatvan basin, which is almost completely bounded by faults.{{sfn|Toker|Sengör|Filiz|Demirbağ|2017|p=167}}