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Modelling unseen flow pathways of water and contaminants in the Wet Tropics: the role of alluvial palaeochannels

Lim, H. S., Nelson, P. N., Cheesman, A. W., Morrison, D., Bulstrode, M., Egger, F., Eccles, R., Weber, T., Owen, L. and Ah-Kee, D. (2024) Modelling unseen flow pathways of water and contaminants in the Wet Tropics: the role of alluvial palaeochannels. James Cook University, Townsville, Qld..


Article Link: https://science.desi.qld.gov.au/__data/assets/pdf_...


Nutrients from agriculture in catchments draining to the Great Barrier Reef (GBR) are a stressor of this important ecosystem. Current GBR catchment models do not mechanistically link movement of nutrients from paddocks to rivers. An understanding of these water and nutrient flow pathways is crucial in any attempt to model and manage the GBR catchments. Conduits of water transport include surface drains and subsurface features such as palaeochannels. Palaeochannels are a common feature in alluvial landscapes, representing old river or stream beds that are often filled with coarse in-fill material which make them ideal water storage zones and conduits of water movement, either by recharging surrounding ground water (GW) or exchanging water with surface drainage networks (e.g., Keen et al., 2007, Owen & Dahlin, 2010, McLachlan et al., 2017). Their presence results in heterogeneity of soil and aquifer properties, which need to be accounted for in any attempt to assess water and nutrient transport in these flat agricultural landscapes.

Item Type:Book
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Business groups:Crop and Food Science
Keywords:Nutrient pollution of water Wet Tropics region Watershed management
Subjects:Agriculture > Agriculture (General) > Agricultural ecology (General)
Agriculture > Agriculture (General) > Agriculture and the environment
Agriculture > Agriculture (General) > Agricultural meteorology. Crops and climate
Agriculture > Agriculture (General) > Agricultural conservation
Agriculture > Agriculture (General) > Fertilisers
Agriculture > Agriculture (General) > Conservation of natural resources
Agriculture > By region or country > Australia > Queensland
Live Archive:17 May 2024 02:48
Last Modified:17 May 2024 02:48

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