Abstract
ABSTRACTThis research focuses on the use of HySpex hyperspectral images for verification of two-dimensional hydrodynamic modelling of open-channel flow over loose bed (CCHE2D) and assessment of water quality in the Zegrze Reservoir. The CCHE2D hydrodynamic model results show the distribution of hydraulic parameters of water flow and the sediment concentrations in the reservoir. HySpex images were used to obtain remote sensing indices of water quality. The images were compared to the hydrodynamic model results and field measurements. The analysis of hydrodynamic model results and hyperspectral image indices show the spatial distribution of the water’s physico-chemical properties in the reservoir, and poor mixing of the Bug River and the Narew River at their confluence. This study shows that there is synergy potential in using hydrodynamic modelling results and remote sensing indices of water quality for analysis of the reservoir’s water quality.
Highlights
Hydrological studies of artificial reservoirs face the problems of their large spatial dimensions and the complex dynamics of water bodies
To study the dynamics of water in the Zegrze Reservoir, we use a two-dimensional hydrodynamic and sediment transport model for unsteady, openchannel flows over loose bed (CCHE2D), which was developed at the National Center for Computational Hydroscience and Engineering of the University of Mississippi, Missisipi,USA (Altinakar, Czernuszenko, Rowiński, & Wang, 2005)
This division of the body of water is confirmed by the CCHE2D model, which depicts the distribution of suspended load in the reservoir; the main stream of sediment is transported by the Bug and travels together with the water from the Narew to the main pool, where it is diluted
Summary
Hydrological studies of artificial reservoirs face the problems of their large spatial dimensions and the complex dynamics of water bodies. Computational fluid dynamics (CFD) methods are capable of describing water velocities in river channels, both two dimensionally and three dimensionally. The problem of describing the process of sediment transport in a riverine environment is altogether more complex, with the difficulty stemming both from limitations on the measurement of concentrations of suspended sediments and bed load and from the need for empirical description of the river channel processes. To study the dynamics of water in the Zegrze Reservoir, we use a two-dimensional hydrodynamic and sediment transport model for unsteady, openchannel flows over loose bed (CCHE2D), which was developed at the National Center for Computational Hydroscience and Engineering of the University of Mississippi, Missisipi,USA (Altinakar, Czernuszenko, Rowiński, & Wang, 2005). The model developed by Wu, Wang and Jia (2000) describes sedimentation processes using equations for suspended-load and bed-load transport
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