Abstracts for the 6th International GAME Conf.
3-5 December 2004
Kyoto Japan
altitudnal variability of monsoon precipitation over Nepal
Prasamsa Singh (1), Shiva Bhakta Prajapati (2)
(1) Dept. of Biological Sciences and Environmental Science, Kathmandu University, Nepal
(2) Department of Hydrology and Meteorology, Nepal
The study conducted some investigations to know the relationship between topographic effects on rainfall distribution with regards to the topographic elevation and some topographic factors (windward and leeward side of mountain) over Nepal. Comparison of relationship between topographic effects on rainfall distribution with regards to the topographic elevation using ground based data of one hundred and one rain gauge stations within domain of latitude 270 30' to 290 40' and longitude 800 00' to 840 00' of period June - August (1998- 2000) and Tropical Rainfall Measuring Mission/ Precipitation Radar (TRMM/ PR) within domain latitude 260 00' to 320 00' and longitude 800 00' to 840 00' of the same period of time are characterized relatively well while taking account the statical analysis. Statical tools correlation, regression and standard error of data are used for the study. Digital elevation map (DEM) with spatial resolution 30 sec (Gtopo30) is used for spatial topographic study. Geographic Information system (GIS) is also used for detail study. Much attention was focused on "effective height for precipitation" i.e. topographic height where amount of rainfall and frequency of rainfall is high. It was found through investigation that the rainfall decreases beyond 1800m using ground based data and 1500m using TRMM data.
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