Young men burn copies of the guide to the Murray-Darling basin plan in the carpark outside the Murray-Darling Basin Authority meeting in Griffith in 2010. This would be welcomed by farmers in the tributaries in Queensland but would mean less environmental water available in the lower Darling. In particular, they oppose a current government proposal to cut the water recovery target for the northern basin by 70GL. They fear that the low population areas along the lower Darling are being sacrificed under the Murray-Darling basin plan and that river authorities are prepared to let their part of the river degrade. Justin argues that governments have chronically mismanaged the Barwon-Darling and the MDBA lacks the authority to enforce the plan. That means they struggle to get suitable water for stock, let alone for their family’s use. Their observations were confirmed by a study by the MDBA, released in March. They say that, since the 1970s, the river has ceased to flow for much longer periods and more often. The McClures and their neighbours have watched the changes in the lower Darling with increasing concern. Photograph: Mike Bowers for Guardian Australia Justin McClure, farmer and grazier from Kallara station on the lower Darling, at the Tilpa pub. It is not an exhaustive exploration, and we urge you to take a real journey through this spectacular part of our wide brown land. With $13bn in funding, the plan attempts to recover water diverted to irrigation and restore flows.įive years in, our leading scientists say the plan is failing to restore the rivers’ health.Ĭome on a journey along the river to investigate what is going wrong with the Murray-Darling basin plan. The Murray-Darling basin plan was introduced in 2012 to tilt the balance back towards the environment. Yet our great river system is under stress. And, for tens of thousands of years, the rivers have provided spiritual and physical sustenance to Indigenous people who live along their banks. The river system also waters important wetlands that provide shelter and breeding grounds to migratory birds and native fish. We can use our approach to recommend the best possible setup with the highest accuracy for a given location or area.Winding through four states, the Murray-Darling and its tributaries have turned dry flat plains into some of Australia’s most productive farmland. “Each urban environment is too individual (e.g., in terms of layout, building types, vegetation) to make a general recommendation for a sensor set up,” said Still. Adding more sensors increased the accuracy but had diminishing returns after a certain point. The smaller the distance between the shooting line and a sensor, the more accurate they could be with their prediction of the source. The localization accuracy depended significantly on the sensor-to-shooter geometry and the shooting direction with respect to the sensor network. The group compared their accuracy prediction to experimental performance under various geometries, weapons, and sensor types. “The smaller the ellipse-shaped area, the higher the expected localization accuracy.” “In our approach, the prediction can be interpreted as an ellipse-shaped area around the true shooter location,” said Still. This modeling, combined with information on sensor characteristics, the sensor-to-shooter geometry, and the urban environment, allowed them to calculate a prediction of localization accuracy. Still and her team used geometric considerations to model acoustic sensor measurements. Preemptively predicting this accuracy is crucial for mission planning in urban environments, because it can inform the necessary number of sensors and their requirements and positions. The combination of these effects can severely impact the accuracy of shooter localization. In an urban setting, buildings or other obstacles can reflect, refract, and absorb sound waves.
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