South Esk River Catchment: High Conservation Value Asset Descriptions Report (National Water Initiative – Australian Government Water Fund. Report 4/6 Report to the Conservation of Freshwater Ecosystem Values Project, Water Resources Division, Department of Primary Industries and Water)

This document describes a set of high conservation value river and wetland assetswithin the South Esk River catchment. It is one of five reports preparedunder the Australian Government Water Fund (AGWF) focussing on highconservation value river and wetlands identified by the Tasmanian CFEV (theConservation of Freshwater Ecosystem Values) framework. The assets described hereare those located in areas likely to be directly affected by decisions made under theWater Management Plan for the South Esk River catchment.The purpose of this report is to provide a summary of information on the biophysicalcharacteristics and condition of assets of high conservation value for the purposes of: Describing the natural values (Conservation of Freshwater Ecosystem Values(CFEV) ‘biophysical classes’) and current condition of key, high conservationvalue river and wetland assets in the catchment. Listing the priority management issues at each asset, and the prioritymanagement actions for their protection/restoration. Listing the water-management related issues which need attention at eachasset.The term asset used in this report refers to either: a specific wetland – mapped as a shape (or ‘polygons’, in GIS terminology) atthe 1: 25,000 map scale. a group of adjacent lengths of river channel, made up of individual riversections (or ‘lines’) mapped at the 1: 25,000 scale.The biophysical descriptions provided here are based on elements described in theTasmanian CFEV framework, supplemented by descriptions derived from focussedfield surveys. The descriptions provide information on: The natural values (CFEV biophysical classes) at each asset – thosecharacteristics which are or would be present in the asset under naturalconditions. The current status or condition of the asset – both as measures of departurefrom the natural state and in relation to particular symptoms of condition (e.g.weeds).The descriptions target values, condition and management issues associated with: For river assets: instream and riparian vegetation, fish, benthicmacroinvertebrates, fluvial geomorphology, overall river section andcatchment status. For wetland assets: within-wetland and riparian vegetation, overall wetlandand proximal catchment status.Data on both natural biophysical classes and condition of the assets is provided fromthe CFEV database and the field surveys. A comparison of the information reported inthe CFEV database and that found from the field surveys is also used to ‘validate’aspects of the CFEV framework i.e. to assess the degree to which the CFEV dataaccurately represents the values and condition of river and wetland assets. Thisanalysis is the subject of a separate report from this project (see Davies et al. 2007), aswell as of a report from a related NRM-funded project.