Accession Number:

AD0654506

Title:

RAIN TEST PROCEDURES RESEARCH 2ND REPORT CORRELATION OF DROPSIZE WITH CLIMATIC REGIONS AND TYPE OF RAIN,

Descriptive Note:

Corporate Author:

FRANKFORD ARSENAL PHILADELPHIA PA QUALITY ASSURANCE DIRECTORATE

Personal Author(s):

Report Date:

1967-06-01

Pagination or Media Count:

36.0

Abstract:

The report describes investigative research performed at Frankford Arsenal, Philadelphia, Pa., on characteristics of natural rainfall for development of simulation criteria. Rainfall distribution patterns may be typified as characteristic to climatic regions. Furthermore, rainfall drop sizes can also be descriptively characterized to types of rainfall e.g., thundershowers, heavy showers, or steady rain. Thunderstorms and tropical storms have the largest drop sizes. However, there is small variation in median drop sizes regardless of the climatic region or type of rain. Based on natural rainfall data observed in temperate and tropical regions, no more than 3 of drop sizes exceed 7 mm in diameter with median drop diameters equal to or less than 1.6 mm. Furthermore, for all types of rainfall and for rainfall of all climatic regions, raindrop diameters exhibit the power function relationship of phi approximately equals kI to the 13rd power where phi is raindrop diameter in mm and I is intensity of rainfall in mmhr. Author

Subject Categories:

  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE