Trends and periodicity in the longest instrumental rainfall series for the area of most extreme rainfall in the world, northeast India
Assam ; Climate fluctuation ; Climatic trend ; India ; Meghalaya ; Monsoon ; Nineteenth Century ; Periodicity ; Precipitation ; Statistics ; Time series ; Twentieth Century
The longest instrumental rainfall series have been investigated for the North Assam subdivision and 4 meteorological stations in Northeast India. Analysis of trends to annual and seasonal rainfall show these to be very stable, with no change
in the rainfall over North Assam during the last 150 years. The Fourier analysis of fluctuations in rainfall series shows that the periodic signal of T = 3,5 year is the strongest one.
important and relevant information to river managers. Furthermore a series of emerging frameworks for incorporating geomorphology in river management exist wherein palaeohydrological data and analysis can be directly interfaced with the river management
and it uses either observed or calculated meteorological parameters. The method is illustrated here in a reconstruction of daily flow series for the River Wye catchment above Rhayader, mid-Wales, for the period 1889-1998. The method makes use of observed
and control. A series of case studies in the Darjiling-Sikkim Himalayas have been undertaken to provide a better understanding of this natural disaster problem.