21 juin 2022 Precipitation so far this water year (October 1 2021 to present) is below average for most of Oregon
16 sept. 2022 Precipitation forecast is less certain. 1956 was wet but 1971 & 2008 were drier than average. Their “blend” yields near-average rainfall.
18 févr. 2017 and hourly records from 24 rain gages in Portland Oregon (OR)
13 juil. 1998 City of Portland Stormwater Management Manual—Month Year. A-1 ... corresponding to 90% of the average annual rainfall can be determined by ...
18 févr. 2017 The hourly data were used to calculate intensity as a ratio of the monthly totals in rainfall volume. (mm) to hours of rainfall (h). Portland ...
Average annual rainfall in Portland Oregon is 37 inches
Portland's integrated combined sewer overflow (CSO) system and the FY 2020 was a below average rainfall year for the City of Portland. The area-.
Bureau of Environmental Services • City of Portland. 2013. Stormwater Figure HA-4: Monthly rainfall and associated runoff retention.
Based on Historical Precipitation Data for Portland. Mrinali Mathur Box and Whisker plot depicting variability in monthly precipitation in Portland.
20 sept. 2021 the full monthly rainfall value as EffectiveRainfall. ... The Portland reference homes were impacted a bit more with the application.
1 N (normal) is the climate normal (1991-2020) for Portland Airport Due to rounding of the monthly values the year total may not equal the sum of the monthly values 2 WY is Water Year which is includes rainy season is defined as the period from 1 October through 30 September
given to this month’s analog years (1972 2001 & 2012) nWhile highly anomalous weather may continue through May and June things should “settle down” by July nHigher elevations will take longer to warm because of the well-above-average snowpack That snow-melt should further improve the drought
PORTLAND 726980 45 58N 122 58W 12 101 18 -8 00 NAP 7201 Annual Heating and Humidification Design Conditions 99 6 99 DP HR MCDB DP HR MCDB WS MCDB WS MCDB MCWS PCWD 2 3a3b4a4b 4c 4d4e 4f 5a5b 5c 5d6a6b 1 -5 6 -2 8 -13 8 1 1 -4 1 -10 0 1 6 -0 4 13 9 0 3 12 5 2 0 6 0 120 Annual Cooling Dehumidification and Enthalpy Design Conditions
These guidelines describe a rainfall method for calculating current or prevailing sewage flowrates It is a shortcut method for using published rainfall statistics to determine peak monthly and daily flows which have specific recurrence intervals or probabilities of occurrence
Portland Stormwater Management Manual The Portland Stormwater Manual uses the 10-year 24-hour storm as the design storm for managing runoff volume recognizing that few sites will be able to retain this volume of stormwater without discharge The water quality treatment standard is a volume treatment goal of 90 percent of the average annual