Table 2.9.3 Phosphorus significance (loads) and agricultural P source Agricultural P Catchment Current P P source P Target P % P over source (%) in P source P area Catchment P load source (%) in source (t/year) target* beef/ (%) in source (km2) (t/year) (%) in (%) in cropping total (%) dairy other Swan–Canning 2 090 26 12 117 33 11 1 45 – – System Peel–Harvey System 11 930 145 75 93 50 2.7 10.1 13.6 6.8 82.7 Leschenault 1 981 27.8 10.7 160 43 31 0.7 74.7 – – Catchment Vasse–Geographe 2 000 53 20 165 32 25.4 5.7 <1 63 – Catchment River Catchment 700 11 8 38 33 45 <1 84 – – Wilson Inlet 2 379 13 60 11 10 2 82 – – – Catchment Oyster Harbour 3 780 23 67 2 4 11 84 – – – Catchment Bremer Catchment 680 1.2 0.95 26 94.4 94.4 – – – – Lake Warden 2 132 2.6 1.4 86 49 51 99 – – – Catchment Data for the Swan–Canning and Peel–Harvey systems, and Leschenault, Scott River and Wilson Inlet catchments were obtained from their current water improvement plans. Data for the Oyster Harbour Catchment was obtained from Master (2007). Data for the Lake Warden Catchment was obtained from DAFWA (2009). Data for the Bremer Catchment was obtained from DAFWA (2008).
Table 2.9.3 Phosphorus significance (loads) and agricultural P source Catchment Catchment area (km2) Current P load (t/year) Target P (t/year) % P over target* Agricultural P source (%) in beef/ P source (%) in cropping P source (%) in dairy P source (%) in P source (%) in other P source total (%) Swan–Canning System 2 090 26 12 117 33 – – 11 1 45 Peel–Harvey System 11 930 145 75 93 50 2.7 10.1 13.6 6.8 82.7 Leschenault Catchment 1 981 27.8 10.7 160 43 – 31 0.7 – 74.7 Vasse–Geographe Catchment 2 000 53 20 165 32 – 25.4 5.7 <1 63 River Catchment 700 11 8 38 33 – 45 – <1 84 Wilson Inlet Catchment 2 379 13 – – 60 – 11 10 2 82 Oyster Harbour Catchment 3 780 23 – – 67 2 4 – 11 84 Bremer Catchment 680 1.2 0.95 26 94.4 – – – – 94.4 Lake Warden Catchment 2 132 2.6 1.4 86 49 51 – – – 99 Data for the Swan–Canning and Peel–Harvey systems, and Leschenault, Scott River and Wilson Inlet catchments were obtained from their current water improvement plans. Data for the Oyster Harbour Catchment was obtained from Master (2007). Data for the Lake Warden Catchment was obtained from DAFWA (2009). Data for the Bremer Catchment was obtained from DAFWA (2008).
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