IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-ISSN: 2278-1684,p-ISSN: 2320-334X, Volume 17, Issue 2 Ser. I (Mar - Apr 2020), PP 11-22 www.iosrjournals.org DOI: 10.9790/1684-1702011122 www.iosrjournals.org 11 | Page Long Term Assessment Of Rainfall Over Different Districts Of Odisha: [A Case Study] Abhijeet Das 1 , Dr. Bhagirathi Tripathy 2 1 Assistant Professor (Consolidated), Civil Engineering Department, IGIT, Sarang, Odisha. 2 Assistant Professor, Civil Engineering Department, IGIT, Sarang, Odisha. Abstract Climate change possesses a threat to life on earth. Number of natural calamities like cyclone, drought, flood, rising of sea level, severe heat and cold wave, melting of snow etc. are some of ready effects that has been directly felt in variation portion of the globe. Climate change can be defined broadly as a change in the state of the climate that can be identified by changes in the mean or the variability of its properties that persist for an extended period typically decade or longer. It refers to any change in climate over time whether due to natural variability or as a result of human activity. This study may be a small step towards recognizing the climate change and its impact on water bodies of the study area. The statistical analysis shows the characteristics of the rainfall.The trend analysis of rainfall has been done by using IDW technique which signifies the amount of rainfall is more in western Odisha during month of July and gradually decreases towards end of monsoon. The IDW map shows the rate of rainfall is high in coastal areas during post-monsoon. This effect is due to the cyclonic effects on Odisha in October month. Keywords: Climate change, Rainfall, Statistical analysis, Trend, IDW. --------------------------------------------------------------------------------------------------------------------------- Date of Submission: 07-02-2019 Date of Acceptance: 13-03-2020 --------------------------------------------------------------------------------------------------------------------------- I. Introduction Climate change is unavoidable and insuperable in its temperament. Climate change is the phenomenon due to emissions of greenhouse gases from deforestation, fuel combustion and industrialization resulting variation in solar energy, precipitation and temperature. Temperature and precipitation are the most overwhelming climate drivers for river hydrology. Climate Change occurs due to internal variability within the climate system and external factors (anthropogenic and natural). Climate change is a plague to the lives, that affects water resources, freshwater habitats, coastal regions, agriculture, forests and vegetation, snow melting and snow cover, and geological processes such as floods, desertification and landslide, and has long-term effects in human health as well as food security and also threaten livelihood and economic stability. Throughout the world there is significant concern about the climate change effect and its variability on inflow of water bodies. Current climate change is the reason for worldwide rising temperature and hence sways the rainfall. The specific objectives of the research are to  Statistical analysis of rainfall of all districts of Odisha  Finding long-term rainfall trends in the districts of Odisha state.  Theimpact of climate change onwater bodies of Odisha.  Projection of future Precipitation of Odisha. II. Review Of Literature A compendious review as carried out on various facets of climate change due to temperature and rainfall factors and trend analysis is summarized as bellow: Leonard Robert Gardner (2009) discussed on climate change effect on runoff through an equation: This equation was used for the estimation of decrement runoff in a scenario of increased temperature and constant precipitation. They showed the changes in runoff in future scenarios were due to the effect of climate change. They gave the scope for further evaluation of presented model for other different basin, related to the climate effect of annual mean runoff. Niels Van Steenbergen&PrtrickWillems (2012) presented a method to check precision of rainfall-runoff models. Here they checked, whether the flow changes due to change in rainfall with respect to climate change or