Considerable development has occurred within the catchment over the past two decades which
has lead to incresses in estimates of the peak level for frequently-occur* floods. To mitigate the
social and economic losses associated with floods in this catchment, the Upper Parramatta River
Catchment ‘Dust (UPRCT) w&s instituted in 1989 with the task of managing flood mitigation
within the catchment, amongst other duties.
There 8re 16 (16) telemetered rain gauges within the Upper Parramatta River Catchment;
locations of these gauges 8re shown in Figure 5. The majority of these gauges have been installed
by the UPRCT since its formation. Consequently, long-term records 8re not available from these
gauges.
Rainfall amounts during 15 minute intervals at the 16 rain gauges were obtained from January
1991 to September 1996. During thii period, 34 storms occurred with daily rainfall total greater
than 20mm, with 1749 rainfall amounts at each site.