Department of Resources, Queensland Government, Australia.
Department of Resources, Queensland Government, Australia.
Mar Pollut Bull. 2021 Apr;165:112163. doi: 10.1016/j.marpolbul.2021.112163. Epub 2021 Feb 25.
The eWater Source modelling framework has been modified to support the Great Barrier Reef (GBR) Dynamic SedNet catchment modelling concept, which is used to simulate fine sediment and particulate nutrient generation, loss, and transport processes across GBR catchments. Catchment scale monitored data sets are used to calibrate and evaluate models. Model performance is assessed qualitatively and quantitatively. Modelling predicts that approximately half of generated sediment is delivered to the GBR lagoon; the remainder is deposited on floodplains, trapped in reservoirs or lost through other minor processes (e.g. irrigation extractions). Gullies are the major source of sediment, with comparable contributions from hillslopes and streambanks. Hillslope sources are considered the major source of particulate nutrients across the GBR catchments. We demonstrate that using locally developed, customised models coupled with a complementary monitoring program can produce credible modelled estimates of pollutant loads and provide a platform for testing catchment scale assumptions and scenarios.
eWaterSource 模型框架经过修改，以支持大堡礁（GBR）动态 SedNet 集水区建模概念，用于模拟 GBR 集水区内细颗粒泥沙和颗粒态养分的产生、损失和迁移过程。集水区监测数据集用于模型校准和验证。模型性能通过定性和定量评估。模拟预测约有一半的泥沙被输送到 GBR 泻湖，其余部分沉积在洪泛平原上，被储存在水库中或通过其他较小的过程（例如灌溉抽取）损失。冲沟是泥沙的主要来源，山坡和河岸也有相当大的贡献。山坡来源被认为是 GBR 集水区颗粒态养分的主要来源。我们证明，使用本地开发的定制模型与补充监测计划相结合，可以对污染物负荷进行可信的模拟估算，并为测试集水区规模的假设和方案提供平台。
