Sumit Kumar Jha
1Corresponding author: Research Scholar, Department of Water Engineering and Management, Central University of
Jharkhand, Ranchi, Jharkhand, India, E-mail: sumitjha261@gmail.com
PratibhaWarwade
Assistant Professor, Department of Water Engineering and Management, Central University of Jharkhand, Ranchi,
Jharkhand, India.E-mail:pratibhawarwade@gmail.com
Sandeep Kumar Mahto
Research Scholar, Department of Water Engineering and Management, Central University of Jharkhand, Ranchi,
Jharkhand, India.E-mail: skmahto17@gmail.com
Article Information
Received: April 13, 2020
Accepted: April 24, 202
ABSTRACT
The study has been done to investigate the decadal change observed in the rainfallof Ramgarh district from 1998 to 2018. Due to the lack of adequate rain gaugestations and irrelevant precipitation data, TRMM method has been used for thestudy. The approved accuracy of TRMM data through NASA has been frequentlyused to study the rainfall data of those locations where the rain gauge stations areunavailable or the data are not relevant for the study. TRMM 3B43 data of 7Raster location points of Ramgarh district has been processed and theprecipitation maps were prepared accordingly under Arc GIS. The precipitationvalues of 1998, 2008 and 2018 of all 7 points were obtained through raster tovector methodology in Arc GIS which was studied and compared through theretrieved GIS precipitation maps. The decadal precipitation of all 7 rasterlocations has shown a gradual decrement in its value when compared thoroughly.The gradual increase in mining and industrial development has possiblydecreased the forest cover as well as the agricultural activities. A sharp overallreduction in the decadal precipitation values is somewhere indicating a seriousconcern towards fulfilling the future water demand of this growing city.
Keywords: TRMM 3B43; Arc GIS; Raster to vector methodology.