RAIN TEST PROCEDURES RESEARCH 2ND REPORT CORRELATION OF DROPSIZE WITH CLIMATIC REGIONS AND TYPE OF RAIN,
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 k(I to the 1/3rd power) where phi is raindrop diameter in mm and I is intensity of rainfall in mm/hr. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1967
- Accession Number
- AD0654506
Entities
People
- Maurice H. Simpson