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- W41527063 abstract "Developments in catchment modelling frameworks, such as the new WaterCAST tool developed by the eWater CRC, have improved the ability to model catchment management and land use changes at the whole of catchment scale. While these tools have given modellers greater flexibility in the approaches, algorithms and frameworks which can be applied to a particular catchment, this paper will examine these improvements through a number of case studies and discuss current benefits and limitations when modelling with the WaterCAST tool at this scale. In the application of catchment models, significant effort is focused on the prediction and calibration of hydrology, however we still have considerable limitations in terms of understanding and predicting hydrologic change through the application of catchment management activities, both in urban and rural land uses. Even at the fundamental level, our ability to discretise between different hydrologic responses driven by spatial characteristics (e.g. different vegetation types, soil characteristics, land management practices, slope etc) is still limited, due to both a lack of process understanding and the difficulty in obtaining sufficient data and at appropriate resolutions. While hydrologic modelling has seen considerable research effort, advances in the modelling of water quality have not progressed by a similar amount, and once again, data limitations may be the key cause of this. Furthermore, advances in the understanding of water quality constituent generation, transport and delivery are still mostly treated at a coarse level such as event mean concentration approaches, and while some advances have been made in understanding water quality processes, the majority of these have yet to be transferred to the whole of catchment modelling frameworks. The current state of catchment modelling in Australia with respect to application of the WaterCAST tool is discussed within this paper, focusing on hydrology, water quality, scale issues (both temporal and spatial), conceptual modelling approaches and data limitations. This shows that the application of the WaterCAST framework provides a flexible modelling platform, however further developments are required to exploit its full potential. This paper also presents a number of case studies highlighting the 'state of play' with modelling the whole of catchment scale and discusses what is required in order to improve out predictive capabilities in terms of the impacts of catchment management and catchment change." @default.
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- W41527063 date "2009-01-01" @default.
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- W41527063 title "Benefits and limitations of current approaches to whole of catchment modelling" @default.
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