I need river catchment spatial data belonging to the Middle East for a research project. It can be any spatial data format(GeoPackage, GeoJSON, Shapefile, CSV with coordinate, KML, etc.). I can easily convert it to the format I need.

All I found in the context of hydrology is Geo-referenced database of dams (Middle East). There are other kind of hydrological data like rivers, lakes etc, but no river catchments.

Actually, I would have asked in GIS StackExchange, but the folks in GISSE are directing me here for the open data requests.