Modelling The Water Quality Impacts Of Forest Roads At The Catchment Scale
نویسندگان
چکیده
A 13,451 ha forested catchment in SE Australia was instrumented for one year to quantify total instream exports of total suspended sediment (TSS) and total phosphorus (TP). 101 road-stream crossings were mapped and characterised in detail within the catchment to identify the properties of these road sections that connect directly to the stream network. Sediment and nutrient generation rates from different forest road types were quantified using permanent instrumentation and rainfall simulation. Sediment and nutrient generation rates, mapped stream crossing information, annual rainfall and traffic data were used to estimate annual loads of TSS and TP from each stream crossing in the catchment. The annual sum of these loads was compared to the measured total catchment exports to determine the proportional contribution of roads within the catchment.
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