Salinity situation statement Tweed River and Gnowergerup Brook
Salinity situation statement Tweed River and Gnowergerup Brook
Salinity situation statement Tweed River and Gnowergerup Brook
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<strong>Salinity</strong> <strong>situation</strong> <strong>statement</strong>: <strong>Tweed</strong> <strong>River</strong> & <strong>Gnowergerup</strong> <strong>Brook</strong> WRT 41 Water Resource Technical Series<br />
2004 – 2005<br />
2006 – 2007<br />
Figure 6 L<strong>and</strong>-use history: planted <strong>and</strong> cleared areas (continued from previous page)<br />
2.3 Surface drainage<br />
The watercourses of these two catchments drain into the Blackwood <strong>River</strong>; most are<br />
ephemeral, especially in the upstream parts (Fig. 5) <strong>and</strong> only further downstream are they<br />
perennial.<br />
2.4 Climate<br />
2005 – 2006<br />
Trees<br />
Pasture<br />
Cleared<br />
Planted<br />
Legend<br />
The climate is Mediterranean-type, characterised by hot, dry summers <strong>and</strong> cool, wet winters<br />
(Figs 7 & 8). There are 22 rain gauging stations in <strong>and</strong> in the vicinity of the catchments.<br />
Monthly catchment rainfall averages across the <strong>Tweed</strong> <strong>and</strong> <strong>Gnowergerup</strong> were obtained by<br />
interpolating data from these rain gauging stations (Fig. 7). The annual rainfall range is 550–<br />
650 mm (Fig. 9) at meteorology station M009556 (1.5 km west of the intersection of<br />
Westbourne <strong>and</strong> Winnejup Roads).<br />
10 Department of Water
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