International Journal of Science and Research (IJSR) ISSN: 2319-7064 ResearchGate Impact Factor (2018): 0.28 | SJIF (2018): 7.426 Volume 8 Issue 8, August 2019 www.ijsr.net Licensed Under Creative Commons Attribution CC BY Morphometric Analysis of Dibru River Basin, Assam using Geo-Spatial Tools Sonowal Gulap 1 , Thakuriah Gitika 2 1 Research Scholar, Geography Department, Cotton University, Guwahati, India 2 Assistant Professor, Geography Department, Cotton University, Guwahati, India Abstract: Quantitative analysis of morphometric parameters helps in understanding the potential of the river basin as it helps in groundwater level management, soil properties and overall management system of the basin. It is necessary to study how fluvial landforms are formed, erosion and depositional works, and soil properties. Present paper deals with the aspects of morphometric parameters like stream order, stream number, basin area, drainage density, drainage frequency, slope with the contour interval of 10 m, basin shape, basin length and long profile etc using Arc GIS 10.1 software. We try to evaluate all the three aspects of the morphometric analysis from the SOI toposheet. Based on all the morphometric analysis progress can make about the understanding of geo- hydrological nature of the natural system and influence on the significance of shaping the basin, their runoff characteristics, infiltration, permeability, erosional power of the river etc. Keywords: morphometry, GIS 1. Introduction Morphometry is define as the measurement and mathematical analysis of the configuration of the earth‟s surface, shape and dimension of its landforms [1]. Morphometric analysis is important in order to study the nature and behaviour of the drainage basin of the natural system. Hydrologic and geomorphic processes are responsible for the formation and development of morphometric parameters in a drainage basin. Basin is not only control by hydrologic but there is various aspects like climate, geologic, structural control of the lithological and vegetation etc. Various parameters of morphometric analysis are used in order to study the characteristics of the river by following the formula of some illustrious people [9]; [26]; [20]; [12]; [4]; [2]. The study of Quantitative parameters like Linear, Relief and Areal aspects are study with the used of software like Arc GIS 10.1 and try to find its relationship with one another in order to study the nature of drainage system. The relationship between the stream order and number of streams along with stream length just depend on the hydrologic, geologic, slope and vegetation cover. Nowadays GIS plays an important role in analysing the morphometric parameters and also helps in manipulation of spatial information. The techniques of GIS not only help in manipulation of spatial information but also help in identification of groundwater level potential, soil properties and overall management of the basin. 2. Objectives The main objectives of this paper is- 1) To study the three aspects of morphometric parameters. 2) To analysis how these parameters helps in shaping a natural system. 3. Geographical background of the study area The Dibru River is a left bank tributary of Brahmaputra River. The basin drain into the plain region of Assam experience the great sub Himalayan terrain and bounded by river Brahmaputra and Lohit in north, Noa Dihing River in the eastern and some tributaries of the Burhi Dihing River in the south and western borders of the basin. Geographically it latitude and longitudinal extension is 27º 25´30ʺ N - 27º46´30ʺN and 95º6´0ʺ E - 95º58´30ʺ E covering about 1779 sq km area of Tinsukia, Dibugarh, Dhemaji district of Assam and part of Arunachal Pradesh with ever-green and semi-deciduous forests and the climatic condition is high humidity and moderate temperature. The slope of the basin varies from gently slope to base level slope (0 o -5 o ). Paper ID: ART2020273 10.21275/ART2020273 531