Farm dams and the need for integrated water storage safety, equity and land-use policy: Comparative case study evidence from Australia

Abstract

Farm dams that are not planned, designed and managed properly at the individual level can create water storage safety, equity and land-use planning threats to downstream communities and the environment that aggregate at the catchment level. The paper extends previous research and understanding into this threefold phenomenon by exploring the integrated policy needs within the Australian setting. This is achieved through comparative case studies involving assessments of farm dam policies and their integration, and on-site audit-style surveys of dam management practices that are related to the policies in two state jurisdictions, South Australia and Tasmania. These case studies represent weak versus strong farm dam safety, equity and land-use regulatory policies and integration. Survey results in South Australia find most hazardous farm dams studied are not built or maintained to an adequate standard and spillways are blocked and/or under-designed. This results in potentially storing more water than entitled and creating unsafe dams and potential water sharing equity and land-use planning threats at both the individual and cumulative levels in catchments. Survey results in Tasmania are in contrast and hence this state serves as an exemplar of feasible 3-fold integrated policy that is performing effectively. Analysis of results against international regulatory benchmarks finds that in addition to Tasmania's model there are other regulatory options that may better suit different jurisdictions, and cost-effective tools to help integrated policy implementation are also available. Based on these findings policy recommendations for South Australia are made. The paper represents indicative lessons and guidance for any jurisdiction internationally with similar circumstances on how to design suitable integrated policy that helps farm dams and proximate land-use be developed and managed safely and equitably.