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Friday, August 7, 2020 | History

3 edition of frequency of high intensity rainfalls in New Zealand found in the catalog.

frequency of high intensity rainfalls in New Zealand

N G Robertson

frequency of high intensity rainfalls in New Zealand

by N G Robertson

  • 80 Want to read
  • 21 Currently reading

Published by New Zealand Meteorological Service [1963] in [Wellington] .
Written in English


Edition Notes

Statementby N. G. Robertson.
SeriesNew Zealand Meteorological Service. Misc. pub. 118
Classifications
LC ClassificationsMLCM 81/0440
The Physical Object
Pagination53 p. illus. 26 cm.
Number of Pages53
ID Numbers
Open LibraryOL4156415M
LC Control Number80136688

NIWA, HIRDS v – High Intensity Rainfall Design System New Zealand Gazette, , Vol. I. New Zealand Government. Pascoe, R.M., Forecasting Heavy Rain in Auckland. New Zealand Meteorological Service Internal Report 6. Severe Weather Log. New Zealand Meteorological Service. intensity and frequency of rainfall in a given area are far safer and more economical if drawn from a study of the occurrence at many stations than if drawn from or year records from only one station. Single-station records seldom, if ever, give a correct picture of the normal rainfall experience in any particular area. The charts.

Previous analysis of daily rainfall extremes in New Zealand using high-quality station data (Griffiths, ) over the periods and showed a clear west-east difference in trends in annual peak hour rainfall magnitude (the annual ‘Rx1day’ index), with. Following our UK Climate Projections blog, below we consider an important aspect of the new UKCP18 projections: improved rainfall projections and extremes.. Rainfall intensity is of key importance to many: it affects urban drainage, sewerage design, surface water flooding, erosion risk and water resources, among a wide range of other aspects.

The tables below list monthly averages for rainfall during March at cities and towns around New Zealand. You can jump to a separate table for places on the North Island and South Island.. Each place has a total for how many days of wet weather it usually gets a . Yu, B. and Neil, T. D.: , ‘Long-term variations in regional rainfall in the south-west of Western Australia and the difference between average and high intensity rainfalls’ l. 13, 77– Google Scholar; Download references.


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Frequency of high intensity rainfalls in New Zealand by N G Robertson Download PDF EPUB FB2

The frequency of high intensity rainfalls in New Zealand. Part 1 / by A.I. Tomlinson. Author. Tomlinson, A. (Alaric Ian), Other Authors.

National. Title: The Frequency of High Intensity Rainfalls in New Zealand. Part I. Water & Soil Technical Publication No. Author Name: Tomlinson, A.I. Categories: New Zealand, Edition: First Edition Publisher: Wellington, National Water and Soil Conservation Organisation: Binding: Soft cover Book Condition: Very Good Type: Book Size: 4to - over 9¾ - 12" tall.

Home; This edition;English, Book edition: The frequency of high intensity rainfalls in New Zealand. Part II, Point estimates / J.D. Coulter and J.W.D. Hessell. HIRDS is a simple online tool that can estimate the magnitude and frequency of high intensity rainfall at any point in New Zealand.

NIWA's High Intensity Rainfall Design System (HIRDS) offers planners and engineers more certainty about the frequency of high-intensity rainfall events, enabling them to better design stormwater drainage, flood defence systems and other vital structures.

HIRDS.V3: High Intensity Rainfall Design System – T he method underpinning the development of regional frequency analysis of extreme rainfalls for New Zealand Craig Thompson 25 February Revision 1 – 11 March Introduction “Extreme value theory provides a.

calculated from at site frequency analysis of intensity gauges and HIRDS v2. • HIRDS v3 gives rainfall depths 9% greater than v2 for intensity gauge sites. This is close to the estimated increase in storm rainfall between and (10% increase from frequency analysis – all durations) •HIRDS v3 gives rainfall depths that are 18% greater.

©Journal of the Royal Society of New Zealand, Vol Number 2,pp. The frequency of high-intensity rainfalls in the central Southern Alps, New Zealand Ian E.

Whitehouse* Rainfall depths from 6 minute to 72 hour durations for various return periods. High Intensity Rainfall System Loading.

@inproceedings{HaanHirdsv3HI, title={Hirds.v3: High Intensity Rainfall Design System – the Method Underpinning the Development of Regional Frequency Analysis of Extreme Rainfalls for New Zealand}, author={Laurens de Haan}, year={} }.

Engineering Geology - Elsevier Publishing Company, Amsterdam - Printed in The Netherlands EARTHFLOW OCCURRENCE DURING HIGH INTENSITY RAINFALL IN EASTERN OTAGO (NEW ZEALAND) M. CROZIER Department of Geography, University of Otago, Dunedin (New Zealand) (Received Febru ) (Resubmitted July 3, ) SUMMARY The characteristics and effects.

assumption of stationarity in the high intensity rainfall frequency may be invalid. For a number of locations in New Zealand, this study describes the influence of the IPO on annual maximum rainfall series for 1- and hour durations over the periodwhich coincides with the two identified phases of the IPO.

The frequencies of high-intensity rainfalls may be required for several conditions of Iran. Therefore, intensity-duration- frequency (IDF) or depth-duration-frequency (DDF) relationship can be obtained at records at each rain duration as compared to New Zealand, and 3) measurement errors for Iran are not small (17, 18).

Unequal CVs at a. New Zealand is not located in the path of cyclones, but once in a while, a tropical cyclone, usually weakened, may reach these latitudes, usually affecting the North Island and the northernmost part of the South Island, bringing rain, wind, and storm surges.

In the last few decades, tropical cyclones or their remains have affected New Zealand. New Zealand's buildings, water supplies and population in general have been deemed at "extreme risk" of climate change impacts this century, which could come with 3C of temperature rise and seas.

Additional Physical Format: Online version: Thompson, C.S. Extreme rainfall frequencies in New Zealand. Wellington, N.Z.: New Zealand Meteorological Service, © The tables below give yearly averages for rainfall at cities and towns across New Zealand.

You can jump to a separate table for places on the North Island and South Island. Each place has a total for how many days of wet weather it usually gets a year and for the normal amount of precipitation. Results for three New Zealand sites show overall increases in rainfall with climate change, brought about largely by an increased frequency of rainfall events rather than an increase in rainfall intensity.

There was little evidence for significant increases in high-intensity short-duration rainfalls at any site. However, 1 mm h −1 rainfall intensity events contributed little to high elevation rainfall (less than 10%), despite the large number of these events (about 50% of the total).

The 1–5 mm h −1 rainfall intensity category also correlated well with elevation and was a major contributor to orographic rainfall (see Fig. 9b). Read "THE FREQUENCY OF HIGH INTENSITY RAINFALLS, New Zealand Geographer" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

New Zealand Mr. Craig Thompson from New Zealand presented High Intensity Rainfall & Flood Frequency Research in New Zealand. The report was divided into 2 parts, with the first part outlining the HIRDS project (High Intensity Rainfall Design System), on which he has.

High highs, and low lows, basically. Which isn’t good. In terms of how climate change will impact extreme rainfall events like what was experienced in February; a warmer atmosphere holds more moisture, so the frequency of extreme rainfall events is ‘very likely’ to increase across New Zealand.Say for a rainfall intensity of 25mm/hr, there is mm 3 of rain water per metre cube of air; that is percent by volume.

Thus the movements of the rain .Water pollution in New Zealand is an increasing concern for those who use and care for waterways and for New Zealand regulatory bodies. An increase in population is linked to an increase in water pollution, due to a range of causes such as rural land use, industrial use and urban development.

Fresh water quality is under pressure from agriculture, hydropower, urban development, pest invasions.