Spatial Variations in Hydro-Meteorological Parameters in the Foot-Hill Areas of Arunachal HimalayasDownload PDF
Rainfall is an important parameter for climatic study which is associated and controls other hydro-meteorological factors such as PET, soil moisture, sub-surface flow, land use etc. But the rainfall pattern, duration and its intensity directly or indirectly influenced by the atmospheric conditions. The present study tried to analyse spatial variability of hydro-meteorological parameters in Dikrong River Catchment which is located in the foot-hill areas of Arunachal Himalayas. For this purpose daily statistics of rainfall and temperature for the periods of 2003-2006 were collected from different offices and used Thornthwaite-Mather method for calculating heat index, PET and soil moisture in Dikrong river catchment of high humid areas of Arunachal Himalayas. It is found that the spatial variation of rainfall was maximum during monsoon season while it is very less during winter. The high concentration PET is found in winter and pre-monsoon period in the lower plain areas and on the other hand it is reverse during monsoon and post monsoon. The soil moisture if found highest in the plains because of high runoff in the upper hilly parts of the catchment.
Keywords: Rainfall, hydro-meteorological, Dikrong, PET, soil moisture