By this time last year, rainfall frequency
well above the 30-year average had already left the ground sodden in many areas, and even as early as September 2017, 83% of Wales had soil moisture levels which were higher than the long term average.
Also, because of climate change, rainfall frequency
as well as the duration has changed.
Moreover, a significantly negative correlation was found between the concentration of TN deposition and rainfall (Y = 189.268[X.sup.-0.997], R = -0.999, P < 0.01), rainfall frequency
(R = -0.783, P < 0.01), and rain intensity (R = -0.783, P < 0.01).
Years 1961~1970 1971~1980 1981~1990 Average annual rainfall days 140 132.8 132.6 Average annual rainfall frequency
0.383 0.364 0.363 Average annual rainfall (mm) 1434.86 1343.17 1361.36 Average daily rainfall 10.25 10.11 10.27 intensity (mm) Extremely average rainfall (mm) 3056.8 2304.6 1612.5 Extreme rainfall days 40 32 22 Extreme rainfall intensity (mm) 76.42 72.01 73.29 Years 1991~2000 2001~2010 Average annual rainfall days 139.5 129.3 Average annual rainfall frequency
0.382 0.354 Average annual rainfall (mm) 1589.53 1347.25 Average daily rainfall 11.39 10.41 intensity (mm) Extremely average rainfall (mm) 590.3 1795.25 Extreme rainfall days 10 32 Extreme rainfall intensity (mm) 59.03 56.10 Notes.
Erosive rainfalls follow the distribution pattern of total precipitation, with the highest erosive rainfall frequency
from January to February and from September to October.
Regional Rainfall Frequency
Analysis for the Luanhe Basin-by Using L-moments and Cluster Techniques.
These were found to impact rainfall frequency
and intensity over Switzerland in downscaling simulations (Figs.
 updated the existing IDF curves in their study region and obtained these curves at ungauged sites throughout the region using newly developed rainfall frequency
Under a 50 years' rainfall frequency
, the debris flow led to complete river blocking.
However, showers are always unpredictable, but if we get to know the rainfall frequency
timing, then government can think of crops and can advice famers to sow short term crops and offer other such advisories, he said.
Sharpley AN (1997) Rainfall frequency
and nitrogen and phosphorus runoff from soil amended with poultry litter.
Rainfall amount analysis showed that rainfall frequency
varies in quantity and duration every year especially with climate change conditions.