Streamwatch water analysis has been undertaken at Lawson Creek since 2005 and at North Lawson since 2008. We test for oxygen and phosphate levels, salt levels, acidity/alkalinity and turbidity (water clearness) every month.
Generally the results for all sites are quite good but we have had problems with excessive sediment flows in Lawson Creek, leading to high turbidity. High concentrations of iron oxide in the tested north Lawson creek, upstream of Fairy Falls, are also a concern, as the iron oxide reduces oxygen levels in the water.
Our Streamwatch activites are auspiced by Australian Museum Streamwatch and Blue Mountains City Council. They provide equipment, annual training and general support. All data collection techniques are quality controlled and data is recorded on a central Streamwatch website.
Further information can be found at:
1. Australian Museum Streamwatch/Streamwatch Project Officer at http://australianmuseum.net.au/streamwatch and
2. Blue Mountains City Council/Aquatic Systems Officers at http://bmcc.nsw.gov.au/waterways. Interesting reading on the BMCC site includes the 2015-16 Waterways Health Report, various Macroinvertebrates Survey Reports and Freshwater Crayfish of Blue Mountains.
We also test for macroinvertebrates (aquatic worms, flys, bugs etc with no backbone) regularly each year. The more the better. Our results fall generally into the Fair-Very Good range.
To see Streamwatch in action, have a look at our film Bushcare Blue Mountains: South Lawson Park. Water and macroinvertebrate sampling are demonstrated:
In 2010 we participated in a stygofauna (groundwater dwelling crustaceans, worms, insects etc) monitoring program in conjunction with BMCC and Macquarie University. Lawson swamp, a section of Lawson Creek, recorded good levels of stygofauna activity and taxa diversity.
Bushcare and Streamwatch are highly complementary activites. Bushcare improves water quality and bug life by stabilising catchment and riparian corridor soils and vegetation. Streamwatch results can indicate if there are major adverse issues in a catchment, such as excessive land clearing, gross pollution and stormwater flow treatment and management deficiencies.
You are welcome to come along to observe our Streamwatch sessions on the third Sunday of the month. Budding junior scientists accompanied by an adult are welcome. Please check for time and location by phone on a prior day (See About Us for contact details).