Research Reformer, ISSN-2319-6904 International Referred Online Research Journal Issue XI, August 2013 23 Full Paper-onlineresearchjournalsssm.in Impact factor 2.5 Role of Morphometric Analysis in Watershed Management: A Case Study of Thriot Watershed, District Lahul and Spiti, Himachal Pradesh Jagdish Chand Assistant Professor, Deptt. of Geography, Govt. PG College, Nahan, HP 173001 Introduction Land and water are two most viable resources, which are the basis of life on the surface of the earth. Right from the evolution of human being as specie, man has been always interacting with their physical environment. This interaction has been necessary for their survival as they depend for all their needs on the natural environment surrounding them. The humans have obtained countless benefits from their environment and in search for more and more advantages they have often ravaged the environment, both inadvertently as well as advertently. It has led to impoverishment of environment in various ways and in some of the areas this impoverishment or environmental degradation has reached serous levels. Himalayas are considered as one of the most fragile ecosystems of the world. Increasing interference of the people due to various economic activities has disturbed its ecological equilibrium. Deforestation, unplanned construction works, unscientific grazing practices etc. have largely affected the physical environment of the region. To combat these environmental problems Government of India has initiated various area specific programmes. Watershed management programmes are one of its kinds, which are becoming very popular these days. It adopts a multi-disciplinary approach with the primary aim of land and water management alongwith the sustainable development of other socio-economic and human resources. Watershed is a purely geographic entity. But today, this aspect is grossly ignored by the planners. For the preparation of an effective watershed management plan and its execution, geographical analysis of the concerned