The Drainage system shows all the major drainage systems of Bhutan.

Digital line dataset of drainage network of Central Karakoram National Park(CKNP) area, Pakistan. The dataset is compiled through GPS based field survey conducted in year 2008.

River network of East Rapti was digitized on ArcGIS at 1:1500 scale.

Digital polygon dataset of Hydrography of Qomolangma Natural Preserve (QNP), Tibet, China.