Boorowa River Recovery Project Integrated Water Resources Management Evaluation
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7th Australian Stream Management Conference - Full Paper Looking at Long Term Riparian Rehabilitation Outcomes: Boorowa River Recovery Project Integrated Water Resources Management Evaluation 1 Gould, L 1 Greening Australia Capital Region, PO Box 538 Jamison Centre, ACT 2614. Email: [email protected] Key Points • Analysis of a large scale riparian project was undertaken looking at Integrated Water Resource Management outcomes – project outputs, environmental outcomes, governance, human engagement and economics. • All targets were exceeded for on ground outputs; positive trends were emerging for ecological indicators but take time and are variable; governance and human engagement elements were strong but a number of lessons were learnt; and economics were difficult to measure but not directly a motivating factor for many participants. • Projects such as BRR need to develop flexible processes that embrace complexity and variability but at the same time meet policy guidelines. Truly successful projects of this nature require commitment and strong engagement of the community to promote ownership. Abstract Riparian rehabilitation in agricultural landscapes focusses on reversing degrading processes, which is undertaken with the assumption these actions will improve ecological function, although this has not been well field tested. This report evaluates a large scale long term riparian rehabilitation project, Boorowa River Recovery (BRR) based on a five year ecological monitoring program and stakeholder surveys. It was found that on-ground works were being completed and maintained, positive trends are emerging in terms of ecological response for a number of variables relating to vegetation, macro-invertebrates and soil stability. There was significant variability both within, and between sites. The quality of sites before projects began, and / or the types of works that took place, drought, floods, and pest animals all influenced results, highlighting the complex and long-term nature of ecological improvement, and the need for monitoring and maintenance. Governance for BRR was strong, especially the NGO–government–community partnership. Human engagement centred on landholders, who had different levels of knowledge. Behavioural change depended on the knowledge platform people were starting from and was facilitated by the history of NRM in the catchment. Economic outcomes varied depending on the nature of farming systems; productivity was not negatively impacted, but there was not a significant gain either. Incentives were critical. Projects of this nature need to embrace complexity and variability, and need to be flexible enough to continually adapt to new people, new ideas and new knowledge. Keywords Boorowa, riparian, rehabilitation, evaluation, monitoring, integrated water resources management Introduction Water management in Australia is of a high standard for drinking water supply (Productivity Commission 2000), but management of catchment health has been poor, particularly riparian zones in agricultural areas (NSW EPA 2003). Riparian rehabilitation has focused on reversing degrading processes, and there is a good evidence underpinning ‘best practice’ (Lovett & Price 2007; Rutherfurd, Jerie & Marsh 2000; Lovett & Price 1999). On-ground works are undertaken with the assumption these actions will improve ecological function, although this has not been well field tested (Lake, Bond & Reich 2007). Evaluations of riparian rehabilitation projects from an Integrated Water Resources Management (IWRM) perspective are difficult to find (Christiansen; Price & Hacker both cited by Pearson et al. 2010). It is for this reason that this paper evaluates a large scale project; Boorowa River Recovery (BRR), as one model of riparian rehabilitation. Located in south-east NSW, BRR is a partnership project, managed by Greening Australia in collaboration with the Lachlan Catchment Management Authority (now Local Land Services) and Boorowa Community Landcare Group and encompasses a range of sub-projects and funding sources. BRR takes a whole of catchment approach, aiming to improve biodiversity and water quality. Landholders are provided with incentives to undertake on-ground works such as fencing, revegetation, alternative stock water, erosion control and problem willow control. Research Approach The research approach follows the logic that inputs result in a variety of outputs which then lead to outcomes and overall goals. Monitoring occurs at all steps along the transition, and results from a range of sources are brought together and Gould, L. (2014). Looking at Long Term Riparian Rehabilitation Outcomes: Boorowa River Recovery Project Integrated Water Resources Management Evaluation, in Vietz, G; Rutherfurd, I.D, and Hughes, R. (editors), Proceedings of the 7th Australian Stream Management Conference. Townsville, Queensland, Pages 319-326. 319 7ASM Full Paper Gould, L - Long Term Riparian Rehabilitation Outcomes used to evaluate project outcomes in line with IWRM theory. A Monitoring Evaluation Reporting Improvement (MERI) framework was developed to evaluate BRR in relation to its main goal and purpose (derived from the project plan) to “improve the economic and socio-political environment in Boorowa Catchment as it relates to water quality and riparian biodiversity” by “improving riparian ecosystem services for agricultural production water supply and environment”. Key result areas (KRA’s) were assessed against key performance indicators (KPI’s), using a range of monitoring methods. KRA’s included 1) Reactions - stakeholders aware of and inspired to improve riparian condition, 2) Capacity – Stakeholders understand issues of poor riparian management and have the knowledge and skills to take action 3) Practise change – 50 primary producers take up incentives to rehabilitate 50km of riparian zone, and 4) Short and long term stakeholder engagement and governance – stakeholder confidence in project processes and 5) Short and long term on-ground outcomes – 50km of riparian zone rehabilitation results in improved water quality, biodiversity and sustainable farm and catchment management benefits. Monitoring and Evaluation Methodology Project Outputs Assessment Methodology Details of individual projects were recorded in a database and sites mapped on GIS. Information collected included landholder personal details, works undertaken, project incentives, landholder contribution, property size and site description. These records, along with landholder interviews, were used to assess outputs against KRA’s. Environmental Outcomes Assessment Methodology The BRR monitoring program involved four main approaches (a)-(d). a) On-ground data collection - Four sites were monitored within each of the five ‘work type’ categories: (1) Fencing and revegetation of erosion gullies; (2) Structural works, fencing and revegetation of erosion gullies; (3) Fencing and revegetation of streams (4) Willow control, fencing and revegetation of streams (5) Fencing for protection of conservation values (remnant vegetation) Each project (or treated) site was paired with a control (or untreated) site (total of 40 sites monitored). Measurements related to vegetation, macroinvertebrates and erosion to demonstrate ecological improvement. Figure 1 shows data collection design. Indicators included bare ground, tree cover, regeneration, shrubs cover, litter, groundcover, macrophytes, shade, and weeds. Stability was measured using CSIRO’s ephemeral streams assessment (Machiori, Tongway & Loch 2003). A 0.5 m cross-section within the 100m transect was used to examine plant cover changes. Macroinvertebrate sampling was carried out using SIGNAL 2 methodology (Chessman 2003). Each site was monitored in 2008, 2010 and 2012. It should be noted that 2008 monitoring was undertaken immediately post works, not prior to works taking place. This was based on the premise that geophysical and biological properties provide reliable estimates of ecological conditions (Jansen et. al. 2001). Figure 1 Data Collection Design for BRR Monitoring Program Gould, L. (2014). Looking at Long Term Riparian Rehabilitation Outcomes: Boorowa River Recovery Project Integrated Water Resources Management Evaluation, in Vietz, G; Rutherfurd, I.D, and Hughes, R. (editors), Proceedings of the 7th Australian Stream Management Conference. Townsville, Queensland, Pages 319-326. 320 7ASM Full Paper Gould, L - Long Term Riparian Rehabilitation Outcomes Linear mixed effects models (Hale & Reich 2013) examined the indicators mentioned above) and their response to treatments. Protocols outlined in Logan (2010, cited by Hale & Reich 2013) were used to assess the potential influence of three factors: 1) riparian treatment method (type), 2) site treatment (control and project) and 3) year of treatment. b) Investigation of water savings associated with willow control Estimations of water savings were based on research undertaken by CSIRO (Doody & Benyon 2011) who found that savings of 3.5 - 5.5 ML/ha of crown canopy can be made removing in-stream willows and replacing them with River Red Gums. Willow crown canopy was measured along a 29 km stretch of the Boorowa River prior to removal using GIS technology, and water savings were calculated. Landholder observations were also taken into account. c) Fish surveys Fish surveys took place in 2008 at nine sites along an 18 km stretch of the Boorowa River to obtain baseline data on fish populations, and at four sites along Pudman Creek (ongoing since 2005), to monitor the survival