Keith Greenham(PDF 1.45
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SUBMISSION 5 RECEIVED 16/08/2017 1 Submission to August 2017 Victoria Inquiry into the Management, Governance and use of Environmental Water Writer: Keith A Greenham AM when restored following NBN disaster Personal & Community Service Biography: www.Keith Greenham AM or www.rra.org.au (Swan Hill Residents & Ratepayers Assn.) Writers Background Lifetime experience in family and personal ownership in Murray River floodplain irrigation farming. 58 years residency on Pental Island’s Murray River frontage. Grazier, Dairy Farmer & in retirement. 20 years of pioneering leadership roles in the Pental Island River Improvement Trust and successor Pental Island River Management Board whose task was levee/wall flood protection planning and authorisation in preparation for development of a new Parish Plan followed by implementation under the discipline of Water Act S157. Liability for a Flow of Water reversed onus of proof. Operations were subsumed into the North Central Catchment Management Authority and infrastructure assets with a 2017 replacement value exceeding $10m written off and unmaintained. Writer of 1990’s accountability documents including Annual Report to Parliament and Transitional Documents. As a Shire of Swan Hill Councillor represented Council at the workshop which led to the decision that water trading would be unregulated which on ownership linkage to land being abolished opened the door to environment and speculative ownership, and as a Councillor was warned of the serious condition of Lake Hume Dam wall which resulted in the immediate release of 1million ML water and serious downstream flooding triggering compensation claims and the Water Authority recording contingent liabilities for many years. Retired Municipal Flood Emergency Plan Flood Warden, continuing community member of State Emergency Service advisory committee and contributor to their newly created emergency planning data base. Committee aware that domestic and rural water service pipelines across leveed floodplains risked serious service failure under levee failure flood conditions. Contributor of major written submissions and local knowledge to formal Investigations and Inquiries related to water issues ranging from 1990’s Swan Hill and Mid-Murray Regional Flood Studies, 2007 VEAC River Red Gum Forests Draft Proposals (Sub 2 3 No 1992),), 2011 Flood Mitigation Infrastructure and Flood Warning and Response, 2015 Murray Darling Basin Plan Senate Inquiry (Sub, No 100) Contents Page 2 Submission Methodology Scope Page 5 Discussion Water quality Geography Black water, Salinity, Turbidity Community perceptions Blue Green Algy Page 3 Terms of Reference Page 7 Evolution of Water Management Key Issues Page 8 Historical Background Page 4 My thoughts Attachments – Swan Hill Murray R Flood Rateing Page 5 Advocacy Curve & Flood information 1870 -2011 2 Submission Methodology Based on: o Documents in my possession including the above, the Victoria Environmental Water Holder 2015/16 Annual Report. and the 2014 Water Bill a Draft consolidation of the 1989 Water Act (giving an insight to governing legislation) and my Summary of Regional Flood Hydrographs 1870 to 2011 (attached) o my lifetime accumulation of local knowledge o Avoiding cockeyed optimism and doomsday pessimism in favour of realism. o I am acutely aware of your Parliamentary Committee responsibilities. In the 1960’s the then Victoria Parliamentary Public Works Committee (PPWC) recommended the dredging of Kerang’s shallow irrigation carrier Pyramid Creek to improve Swan Hill irrigation response times in ignorance of its potential flood impact. The flood impact was felt in 1973,74,75 with Kerang Township under threat and major downstream levee failures. The resulting PPWC Inquiry recommended major upgrade of levee systems. Fortunately we did not live in a litigious society which demanded compensation for losses. For the Pental Island River Improvement Trust it led to abandonment of its beneficiary pays capital works funding model in favour full State capital works funding in compensation for State negligence. Scope of Submission This submission relates to the management and use of CEWH & VEWH environmental water held and managed for use in Victoria’s Murray Darling Basin out-falling to NSW Murray River. My understanding is that Victoria environment manager agencies would order water for projects under the provisions of a Watering Plan and that before delivery the Plan is tested against Murray Darling Basin Authority or any other Guidelines and a VEWH Risk Management Plan. Geography of the Southern Murray Darling Basin Victoria Northern and western slopes outfall to the NSW Murray River above Swan Hill NSW Murray River above Swan Hill outfalls to the Wakool River via the Edwards River and downstream creek and depression effluents creating a massive flood pondage basin with all flood flow finally returning to the Murray River below Swan Hill at Wakool Junction below which Lachlan and Murrumbidgee flows enter the Murray River. 1956 all the rivers ran flood records indicate that the years flow at Swan Hill was 7 million ML and at the Wakool Bridge 26 million ML. For the Murray River upstream and downstream of say Nyah/ Piangil in the Swan Hill Municipality environmental issues are vastly different. Community perceptions of a healthy Murray River system Historically European settlement encountered a free flowing river system based on lake and floodplain pondage which in 1870 recorded a level of 67.85m AHD at Swan Hill which is the current benchmark for land use planning purposes (the exact gauge location may not be the same as presently unused) and in 1914 ran dry in the Swan Hill Region. (Pictorial evidence available) and in 1975 the European built environment Swan Hill flood level is 67.7 m AHD and the benchmark for provision of flood mitigation services and, has not run dry in 100 years. Settlers also encountered a treeless riverfront environment with explorer Major Mitchell unaware of the existence of major waterways in the treeless landscape ahead. Today’s built environment evolved through construction by horse and scoop technology of levee banks and irrigation channels giving pioneering communities access to highly productive alluvial floodplain land in a relatively low rainfall region. Commissioning small river storages and irrigation diversion weirs led to the great mountain storages Hume, Elden, Dartmouth which would have required the then equivalent of a business case to support construction. 3 Their overall potential negative environmental impact is balanced by reduced flood pondage through levee protected urban and rural agricultural development and some lake closures. In the Victoria Swan Hill Region Lake Baker and another east of Lake Boga along with the huge Tyntynder/Murray Downs Prior Stream Lake whose NSW lunettes define its size are now devoted to irrigation agriculture and LakeTutchewop and its appendage lakes to salinity management. Kerang Lakes and Lake Boga are mid-stream water storages with limited capacity for flood pondage. In NSW many creeks and depressions flowing northward to the Wakool River have been leveed off further reducing pondage raising built environment flood levels. Pental Island land types range from deep alluvial (depressions) to shallow alluvial (10cm) and red Shepparton Clay soils. During 1975 flood levees located on the edge of highland Shepparton Clay failed indicating that flood levels exceeded those experienced by our first people. For Victoria upstream of Nyah/Piangil these actions more regularly raised flood levels to natural free flow levels and beyond enhancing existing Red Gum Forests and produced the continuous ribbons of green which we have come to love and wish to preserve, however, for NSW northward natural peak free flow above and below Torrumbarry to the Edwards/Wakool system fell dramatically enhancing floodplain agricultural enterprise (see hydrographic info.) but impacting on Red Gum Forests downstream of say Nyah/Piangil justifying the Hattah Kulkine project In some cases irrigation area rising water tables led to serious water quality problems which impacted on river health. These have been successfully dealt with through water trading and engineering solutions. The question is what are the specific expectations of the community? What is the formal definition of the Healthy River System the community seeks? We cannot reasonably argue that we abandon floodplain irrigation in favour of a return to the conditions our first people lived in and early settlers encountered. Terms of Reference summarised o Management, governance and use of environmental water in Victoria o Including but not limited to - . Preventing or causing black water events . How managers interact and use management tools . Whether carryover impacts on water for irrigators, . Barriers to more efficient environmental water use. Equity of fees and charges Key Issues Water Trading and unbundling of land and water ownership while in the short term was well intentioned in the National Interest it set the scene for long term decline in floodplain pasture based irrigation enterprises as operators retire or react to World commodity prices. The Victoria Floodplain Management Strategy suggests that Flood Mitigation Infrastructure supporting both irrigation enterprises and the environment in raising flood levels will in the long term be abandoned due to Business Case constraints. The demise of subsistence farming and emergence of family farm businesses and corporate irrigation enterprises