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Title
Rainfall Intensity Changes Over Time: Have the Codes Kept Pace?
Rainfall Intensity Changes Over Time: Have the Codes Kept Pace?
Date
10/2021
10/2021
Author(s)
Jeffrey Lavine
Jeffrey Lavine
Page(s)
20-30
20-30
Source
IIBEC Interface
IIBEC Interface
Keyword(s)
rain; participation; climate; conduction; systems
rain; participation; climate; conduction; systems
Abstract
More intense rains seem to be occurring and with greater frequency in many parts of the United States. In 2016, the U.S. Environmental Protection Agency (EPA) reported that total annual precipitation has increased in the United States and worldwide at an average rate of 0.08 in. (2 mm) per decade since 1901, and during this same-period, precipitation in the contiguous 48 states has increased at a rate of 0.17 in. (4 mm) per decade (Fig. 1).1 The EPA went on to say, "In recent years, a higher percentage of precipitation in the United States has come in the form of intense single-day events. Nationwide, nine of the top 10 years for extreme one-day precipitation events have occurred since 1990." Furthermore, from 1910 to 2015, "the portion of the country experiencing extreme single-day precipitation events increased at a rate of about half a percentage point per decade.
More intense rains seem to be occurring and with greater frequency in many parts of the United States. In 2016, the U.S. Environmental Protection Agency (EPA) reported that total annual precipitation has increased in the United States and worldwide at an average rate of 0.08 in. (2 mm) per decade since 1901, and during this same-period, precipitation in the contiguous 48 states has increased at a rate of 0.17 in. (4 mm) per decade (Fig. 1).1 The EPA went on to say, "In recent years, a higher percentage of precipitation in the United States has come in the form of intense single-day events. Nationwide, nine of the top 10 years for extreme one-day precipitation events have occurred since 1990." Furthermore, from 1910 to 2015, "the portion of the country experiencing extreme single-day precipitation events increased at a rate of about half a percentage point per decade.