Accession Number : AD0667551

Title :   EXTREME DAILY RAINFALL AMOUNTS IN THE REPUBLIC OF VIETNAM,

Corporate Author : WEATHER WING (1ST) APO SAN FRANCISCO 96553

Personal Author(s) : Atkinson,Gary D.

Report Date : MAR 1968

Pagination or Media Count : 34

Abstract : The double exponential distribution is applied to extreme daily rainfall amounts in the Republic of Vietnam. With few exceptions, this distribution fits the annual extremes very well and is used to determine expected daily extremes for return periods of 5 to 100 years. The expected extremes for a 100 year return period range from 6 to 8 inches in the Southern lowlands to over 20 inches in the mountainous regions in the north. The double exponential distribution also gives a fair fit to the monthly extremes during the wetter months. The seasonal distribution and physical causes of the annual daily extremes are discussed. Along the east coast and northern mountains, the highest daily rainfall amount each year generally occurs between mid-September and mid-December corresponding to the maximum frequency of tropical cyclones during this period. Over the remainder of the country, the annual extremes are caused by heavy thunderstorms and can occur any time during the southwest monsoon or transition months (April through November). (Author)

Descriptors :   (*RAINFALL, VIETNAM), DIURNAL VARIATIONS, VOLUME, DISTRIBUTION, MOUNTAINS, WEATHER FORECASTING, INTENSITY, WEATHER STATIONS, ATMOSPHERIC PRECIPITATION, METEOROLOGICAL CHARTS, TERRAIN, PREDICTIONS, HYDROLOGY, CIVIL ENGINEERING, TROPICAL REGIONS

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE