International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 03 | Mar-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 3581 Calculation of Life of Reservoir by Reducing the Silt Akshay M. Patil 1 , Aniket A. Zanke 2 , Somesh T. More 3 , Tejas S. Valke 4 , Dipali Patil 5 1, 2, 3, 4 Final Year Student, Department of Civil Engineering, D.R.I,E.M.S, Neral, Maharashtra, India 5 Assistant Professor, Dept. of Civil Engineering, D.R.I.E.M.S. Neral, Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - We know that due to sedimentation of silt in the reservoir reduce the life of reservoir. So reducing silt upcoming in reservoir at it’s source by various method improves life of reservoir. The most important practical and critical problem related to performance of reservoir is the estimation of storage capacity loss due to sedimentation process. The problem to be addressed is to estimate the rate of sediment deposition and period of time at which the sediment would interfere with the useful functioning of reservoir. Fairly large number of methods and models are available for the estimation, analysis and prediction of reservoir sedimentation process. However, these method and models differ greatly in terms of their complexity, input and computational requirements. Key Words: Silting (clogging), Desilting, Forecasting methods, Mitigation measures of silting (clogging) 1. INTRODUCTION The water cycle, also known as the hydrological cycle or the hydrologic cycle, describes the continuous movement of water on, above and below the surface of the Earth. The mass of water on Earth remains fairly constant over time but the partitioning of the water into the major reservoirs of ice, fresh water, saline water and atmospheric water is variable depending on a wide range of climatic variables. 1.1 Silt Silt is granular material of a size between sand and clay, whose mineral origin is quartz [1] and feldspar. Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension with water (also known as a suspended load) and soil in a body of water such as a river. It may also exist as soil deposited at the bottom of a water body, like mudflows from landslides. Silt has a moderate specific area with a typically non-sticky, plastic feel. Silt usually has a floury feel when dry, and a slippery feel when wet. Silt can be visually observed with a hand lens. 1.2 Different Types of Silt The soil is basically classified into three types: Sand, Silt, Clay. Figure-1. Types of silt 1.3 Eutrophication In designing reservoirs, silting problem plays an important role because their operating mode and period depend on this phenomenon. Annual sediment load in a lake is 2-3 or even 4 times higher than the one required by design. The process of eutrophication can be both natural and human induced. Natural eutrophication where the basin gradually fills in from nutrient and sediment inputs. Occurs over long time period on the order of centuries. Human induced or cultural eutrophication, occurs on a much shorter time scale(decades) as a result of human disturbance and nutrient inputs. Figure-2 Natural Eutrophication 2. STDUY AREA 1. Location:- Padale is a small Village/hamlet in Murbad Taluka in Thane District of Maharashtra State, India. It comes under Padale Panchayath. It belongs to Konkan region . It belongs to Konkan Division. It is located 77 KM towards East from District head quarters Thane. 9KM from Murbad. 89KM from State capital Mumbai. It is located on bhamkori river at the site od padale village in murbad taluka of thane district in Maharashtra state of India.