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A dynamic landscape evolution modelling platform (CLiDE) is presented that allows a variety of Earth system interactions to be explored under differing environmental forcing factors. Representation of distributed surface and subsurface hydrology within CLiDE is suited to simulation at sub-annual to centennial time-scales. In this study the hydrological components of CLiDE are evaluated against analytical solutions and recorded datasets. The impact of differing groundwater regimes on sediment discharge is examined for a simple, idealised catchment, Sediment discharge is found to be a function of the evolving catchment morphology. Application of CLiDE to the upper Eden Valley catchment, UK, suggests the addition of baseflow-return from groundwater into the fluvial system modifies the total catchment sediment discharge and the spatio-temporal distribution of sediment fluxes during storm events. The occurrence of a storm following a period of appreciable antecedent rainfall is found to increase simulated sediment fluxes. 相似文献
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在气候变化背景下,水文连通是风景园林学学科中
景观水文研究的热点和重点之一。目前的景观水文连通研究
多基于静态地表,而忽略地表演化过程,尤其是河底泥沙动态
变化。在总结现有水文连通研究的基础上,结合气候预测模
型、水动力地表景观演变模型及景观连通指数研究方法,以英
国赛文河凯尔苏斯流域为研究区,采用UKCP18气候模型预
测RCP8.5情景下未来10年间(2021—2030年)日降雨量,
运用凯撒二维水动力地表景观演变模型(CAESAR-Lisflood)
模拟10年连续河流演化及淹没模式变化,基于景观连通指数
评价流域景观水文的动态连通变化。结果表明：泥沙变化对淹
没模式和水文连通性产生影响,未来10年间整体连接度(IIC)与
可能连通性(PC)变低,雨季水文IIC与PC变化幅度较大,旱季
平稳。凯尔苏斯流域洪泛区域比河道的沉积作用更明显,流域
总沉积量是侵蚀量的4.6倍。泥沙输移作用使得淹没面积减少
0.25km2
、流域总水量减少40%,水文IIC与PC降低 相似文献
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