1730769411Annual Extreme Precipitation.Pdf

Government of Nepal Ministry of Energy, Water Resource and Irrigation Department of Hydrology and Meteorology Climate Division Babarmahal, Kathmandu Annual Extreme Precipitation The precipitation extremes are usually recorded in Nepal during the monsoon months (June-September) especially in the month of July and August. There are a few cases that the extremes are recorded in other months. In this report, daily extreme precipitation information of major 20 stations shown in map 1 is presented. Among these stations, the highest daily extreme precipitation of 423.1mm was recorded at Birendranagar, Surkhet on 15 August 2014. Trend and its significance of daily extreme precipitation are shown in Table 1 and ever recorded daily extreme precipitation is shown in Table 2.

Government of Nepal Ministry of Energy, Water Resource and Irrigation Department of Hydrology and Meteorology Climate Division Babarmahal, Kathmandu

Table1: Trend and Significance of extreme daily precipitation annually

Trend of extreme daily precipitation annually Longitude Latitude Stations Significance at 95 % (Deg) (Deg) Trend (mm/year) confidence level (p-value) Dadeldhura 80.588 29.301 0.52 / increasing 0.08 / Insignificant Dhangadhi 80.560 28.813 0.7 / increasing 0.09 / Insignificant Dipayal 80.937 29.262 0.18 / increasing 0.69 / Insignificant Jumla 82.180 29.275 -0.07 / decreasing 0.54 / Insignificant Surkhet 81.635 28.588 -0.04 / decreasing 0.87 / Insignificant Nepalgunj Airport 81.668 28.101 1.2 / increasing 0.43 / Insignificant Ghorahi (Dang) 82.484 28.037 -0.34 / decreasing 0.76 / Insignificant Jomsom 83.730 28.784 -0.21 / decreasing 0.14 / Insignificant Bhairahawa Airport 83.420 27.507 0.16 / increasing 0.77 / Insignificant Pokhara Airport 83.980 28.200 0.82 / increasing 0.03 / Significant Lumle 83.818 28.297 0.36 / increasing 0.34 / Insignificant Simara Airport 84.980 27.164 -0.09 / decreasing 0.83 / Insignificant Kathmandu Airport 85.356 27.704 0.18 / increasing 0.21 / Insignificant Jiri 86.232 27.630 0.34 / increasing 0.02 / Significant Janakpur Airport 85.924 26.711 1.01 / increasing 0.11 / Insignificant Okhaldhunga 86.504 27.308 -0.22 / decreasing 0.16 / Insignificant Dhankuta 87.346 26.983 -0.16 / decreasing 0.42 / Insignificant Dharan Bazzar 87.298 26.792 -0.15 / decreasing 0.58 / Insignificant Biratnagar Airport 87.267 26.484 -0.56 / decreasing 0.21 / Insignificant Taplejung 87.670 27.359 -0.02 / decreasing 0.95 / Insignificant

Government of Nepal Ministry of Energy, Water Resource and Irrigation Department of Hydrology and Meteorology Climate Division Babarmahal, Kathmandu

Table2: Ever recorded annual and monthly highest daily precipitation information

Ever recorded highest daily precipitation information Stations Longitude (Deg) Latitude (Deg) Annual [value (mm) /date]

Dadeldhura 80.588 29.301 226.6 / 18 August 2009 Dhangadhi 80.560 28.813 290.9 / 19 July 2013 Dipayal 80.937 29.262 245.7 / 6 October 2009 Jumla 82.180 29.275 206.8 / 14 September 1975 Surkhet 81.635 28.588 423.1 / 15 August 2014 Nepalgunj Airport 81.668 28.101 336.9 / 27 August 2006 Ghorahi (Dang) 82.484 28.037 298.4 / 15 August 2014 Jomsom 83.730 28.784 88.8 / 29 November 1974 Bhairahawa Airport 83.420 27.507 266.5 / 3 August 1998 Pokhara Airport 83.980 28.200 357 / 18 August 2001 Lumle 83.818 28.297 308.3 / 9 July 2017 Simara Airport 84.980 27.164 300.3 / 1 August 1987 Kathmandu Airport 85.356 27.704 177 / 23 July 2002 Jiri 86.232 27.630 400 / 25 August 1966 Janakpur Airport 85.924 26.711 339.5 / 23 June 2000 Okhaldhunga 86.504 27.308 170.4 / 10 July 2004 Dhankuta 87.346 26.983 265 / 24 June 1961 Dharan Bazzar 87.298 26.792 352 / 28 July 1985 Biratnagar Airport 87.267 26.484 405 / 2 July 1974 Taplejung 87.670 27.359 143.1 / 14 July 2002

Government of Nepal Ministry of Energy, Water Resource and Irrigation Department of Hydrology and Meteorology Climate Division Babarmahal, Kathmandu

Map 1: Distribution of 20 stations used in this report.