Waterway Condition

Waterway condition in Victoria is assessed using the Index of Stream Condition (ISC). The ISC assesses changes in hydrology, water quality, streamside vegetation, bed and bank condition, in-stream habitat and aquatic macro-invertebrate (water bug) diversity.

The condition of waterways within the Goulburn Broken catchment is presented in Figure 1 and Figure 2, which shows the percentage of streams in each condition category.

Figure 1 - Broken Basin (ISC) Results 2010Figure 2 - Goulburn Basin (ISC) Results 2010

Figure 1 - Broken Basin (ISC) Results 2010                           Figure 2 - Goulburn Basin (ISC) Results 2010 

Values and Threats

Values

The local community and visitors to the region identify with a range of waterway values they regard as important to maintain and protect, including:

  • Recreational fishing
  • Native flora and fauna
  • Water supply for townships, stock and domestic
  • Water supply for agriculture and industry
  • Tourism and recreation
  • Cultural heritage
  • Aesthetic and lifestyle.

Threats

Threatening activities and processes to waterways, include (but are not limited to):

  • Catchment clearing
  • Climate change
  • Groundwater extraction
  • Salinity
  • Pest plant and animal invasion
  • Snag removal
  • Stock access to riparian land
  • Waterway regulation and flow diversion
  • Environmental flows (impact on recreational values)
  • River channel hydrology (rates of rise and fall, unseasonal flow)
  • Wave action (e.g. jet and water skiing)
  • Urban and agricultural development.