This tutorial manual has been prepared with an aim to assist the implementation of the J2000 hydrological model in catchments of the Hindu Kush Himalayan region. It has been prepared in such a way that the J2000 hydrological model can be applied independently to other basins. The manual contains systematically represented information on the application of the J2000 model in the Panjshir catchment of the Kabul River basin to enable users to set up the application and understand the hydrological processes characteristic of the basin.