International Journal of Engineering and Advanced Technology (IJEAT) ISSN: 2249 – 8958, Volume-9 Issue-3, February, 2020 3898 Published By: Blue Eyes Intelligence Engineering & Sciences Publication Retrieval Number: C6431029320/2020©BEIESP DOI: 10.35940/ijeat.C6431.029320 Estimation of Water Balance Components of Watersheds in the Manjira River Basin using SWAT Model and GIS Akshata Mestry, Raju Narwade, Karthik Nagarajan Abstract: This study mainly focus on hydrological behavior of watersheds in The Manjira River basin using soil and water assessment tool (SWAT) and Geographical information system (GIS). The water balance components for watersheds in the Manjira River were determined by using SWAT model and GIS. Determination of these water balance components helps to study direct and indirect factors affecting characteristics of selected watersheds. Manjira River contains total 28 watersheds among them 2 were selected having watershed code as MNJR008 and MNJR011 specified by the Central Ground Water Board. The SWAT input data such as Digital elevation model (DEM), land use and land cover (LU/LC), Soil classification, slope and weather data was collected. Using these inputs in SWAT the different water balancing components such as rainfall, baseflow, surface runoff, evapotranspiration (ET), potential evapotranspiration (PET) and water yield for each watershed were determined. The evaluated data is then validated by Regression analysis, in which two datasets were compared. Simulated rain data from SWAT simulation and observed rain data from Global Weather Data for SWAT was selected for comparison for each watershed. Keywords — Water balance components, soil and water assessment tool (SWAT), Digital elevation model (DEM). I. INTRODUCTION Water resource management has proven important factor from several aspects, such as irrigation, development of water-bodies for future needs, protection of water resources from pollution and also controlling quality as well as quantity of water. The different climatic conditions and human activities are changing water resource characteristics such as land cover, land use, soil condition, surface runoff and rainfall [1]. For effective water resource management first of all various hydrological components and water cycle must be studied and taken into consideration, which includes evapotranspiration, transpiration, condensation, precipitation and runoff. Water scarcity is most common problem in many countries throughout the world and so in India. To overcome this problem proper water resource management is essential. The Marathwada region in Maharashtra, India faces water crisis every year due to depletion of water level. To find out the solution on such problems detailed study of water resources on smaller scale must be done [11]. Revised Manuscript Received on February 28, 2020. * Correspondence Author Akshata Mestry*, Department of Civil Engineering, Pillai HOC College of Engineering & Technology, Rasayani, India. E-mail: akshumestry17@gmail.com. Raju Narwade, Department of Civil Engineering, Pillai HOC College of Engineering & Technology, Rasayani, India. E-mail: rnarwade@mes.ac.in. Karthik Nagarajan, Department of Civil Engineering, Pillai HOC College of Engineering & Technology, Rasayani, India. E-mail: knagaranjan@mes.ac.in. The study area includes two watersheds from Manar stream (watershed code-MNJR008 and MNJR011) [19]. These watersheds come under Manjira river which is the tributary of India’s second largest river Godavari and flows through some parts of Marathwada region. The various GIS data such as soil data, LU/LC, DEM used as inputs in SWAT to determine water balance components of study area. The water balancing components helps in water budgeting, gives brief idea about watershed characteristics, this further can be used to predict the availability of water and so can help in water resource management.[14] II. LITERATURE REVIEW In this detailed literature survey was done to study and understand the different uses of SWAT, GIS and similar softwares in water management. With the help of SWAT model and geospatial techniques assessment of water balance of watershed in kurumali sub basin and Karuvannur river basin was done by Sandra George, Sathian and K.K. (2016) [13]. Frederick Ayivi and Manoj K Jha (2018) Estimated Water yield and water balance in Reedy Fork- Buffalo creek watershed in North Carolina, they also assessed the performance of SWAT for future prediction of water balance and water yield in other watersheds of North Carolina [5]. Hayal Desta and Brook lemma (2017) quantified and compared water balance components, discharge of feeder river and evapotranspiration in Lake ziway watershed, Ethiopia using SWAT model[6]. O.M.M. Abdelwahab et al. (2018) compared simulation of soil erosion in Mediterranean watershed generated by two most widely used models, SWAT Soil and water assessment tool and Annualised agricultural Non-point source (AnnAGNPS) [10]. Muhammad adnan et al.(2019) quantified water budget of Nam Co lake by using SWAT (soil and water assessment tool coupled with DDM (Degree day model) over period of 2007 to 2013 [8]. David rivas-tabares(2019) assessed the water balance of cega-eresma-adaja watershed, they assessed land use in detail, water demand for period 2004- 2014 of agricultural land using SWAT [4]. Natalja cerkasova et al.(2018) developed hydrology and water quality model for Nemunas large transboundaries watershed using SWAT, they used customized MATLAB scripts for HRU (hydrologic response unit) production also assessed SWAT model setup approaches for HRU definitions [9]. Aditya Nilawar and Milind Waikar (2019) quantified effects of climate change on sediment concentration and streamflow of Purna river basin in India by using SWAT [2]. Abeyou W. Worqlul et al. (2018) used SWAT model to evaluate hydrologic responses such as surface runoff response, water balance to soil characteristics for paired watershed in upper Blue Nile basin,