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This is also comparable with the distributions of the R-factor estimated using pluviograph data for the region.
For this study, we have assembled weather data for Gunnedah from the following sources: (1) on-site daily rainfall, and maximum and minimum temperature recorded manually; (2) digitised pluviograph data at 6-min intervals; (3) complete DataDrill data set since 1957 for the site (QCCA 1998); and (4) global radiation data estimated using geo-stationary meteorological satellites (GMS) (Gautier et al.
The tropics of Australia is one of only few tropical regions in the world where pluviograph data, also known as breakpoint data, for periods of more than 20 years are available to compute the R-factor as originally recommended (Wischmeier and Smith 1978).
On pluviograph tapes, the rainfall amount was recorded in the time interval of 10 min.
In the previous studies, the regional relationship for parameter values developed for Australia was based on pluviograph data from several disparate studies, including 29 sites from NSW, 41 from the tropics, and four from South Australia (Yu 1998).
Since pluviograph and detailed rainstorm data are rarely available at standard meteorological stations, mean annual [7,45,60] and monthly rainfall amount (Ferro et al.
Direct measurement of precipitation by pluviometer, totalizer and pluviograph is done by ministry of energy and meteorological organization of country.
Rainfall at the site was measured from a 203-mm, brass-rimmed, tipping-bucket pluviograph at the head point of the catchments.
A Fuess-type pluviograph was used with daily intervals, a millimeter-graduated vertical scale that was subdivided decimally, and an hour-graduated horizontal scale that was subdivided at 10 minutes.
The R-factor and its monthly distributions were calculated using a daily rainfall erosivity model (Yu and Rosewell 1996) that predicts R on the basis of an empirical relationship between R-factor calculated using pluviograph rainfall data and daily rainfall amount.