Artur Magnuszewski

The structure and function of the Vistula River floodplain near Plock, Poland

Abstract The geological history of the Vistula River Valley reach near the city of Plock (Poland) has been studied. The geological structure of the floodplain and over-flood terraces shows that the whole fluvial system has experienced considerable changes in the last 10 ka years. The form of the valley floor shaped in the past controls the recent hydrological processes — pattern of river floods, and groundwater recharge area. Recognition of the geological history of the floodplain is fundamental for understanding recent ecohydrological processes. Geographical information systems (GIS) have been used for modeling the digital terrain model (DTM) and proved to be very useful.

Influence on Flood Safety of Channel Processes and Vegetation in the River Vistula Valley in Warsaw

The influence of floodplain plant communities on flood conveyance has been estimated using a two-dimensional hydrodynamic model CCHE2D to model flow in the contemporary River Vistula channel in Warsaw. In the study the channel reach between 501 and 521 km limited by flood protective dikes has been analyzed. The influence of vegetation on flow resistance has been estimated by applying two scenarios of flood wave passage. The first scenario “0” describes the flow with existing dense vegetation and scenario “1” simulates the situation in which tall trees and dense shrubs are cleared at the right river bank between 509 and 519 km. Simulations have been run for the discharges Q1 % = 6430 m3 s−1 and Q0.1 % = 8250 m3 s−1. Obtained results show that the largest, 0.56 m decrease of the water surface after the trees cutting occurs at 510 km and discharge Q0.1 %. Application of 2D hydrodynamic model for different scenarios of the floodplain maintenance helps to predict the flood conveyance in highly urbanized and vulnerable area of the city of Warsaw.

Application of the AISA Hyperspectral Image for Verification of Sediment Transport Results Obtained from CCHE2D Hydrodynamic Model—Zegrze Reservoir Case Study, Poland

Zegrze Reservoir was built on the Narew River and its tributary Bug River in the period 1957–1963. The hydraulic conditions at the Bug River mouth had been studied with the use of hydrodynamic two dimensional model CCHE2D. Distribution of the sediment transport was recorded by the AISA hyperspectral scanner and shown as a remote sensing index of Red Edge Normalized Difference Vegetation Index—NDVI705 and Total Suspended Solids—TSS. Results of suspended sediments concentration from the CCHE2D model had been converted to a graphical (vector) form and compared with remote sensing indexes. Relationship between remote sensing indexes and CCHE2D model simulation results had been evaluated using statistical method of Spearman correlation.

GIS approach to estimation of the total phosphorous transfer in the Pilica River lowland catchment

Abstract In this paper, the Pilica River catchment (central Poland) is analyzed with a focus on understanding the total phosphorous transfer along the river system which also contains the large artificial Sulejów Reservoir. The paper presents a GIS method for estimating the total phosphorous (TP) load from proxy data representing sub-catchment land use and census data. The modelled load of TP is compared to the actual transfer of TP in the Pilica River system. The results shows that the metrics of connectivity between river system and dwelling areas as well as settlement density in the sub-catchments are useful predictors of the total phosphorous load. The presence of a large reservoir in the middle course of the river can disrupt nutrient transport along a river continuum by trapping and retaining suspended sediment and its associated TP load. Analysis of the indirect estimation of TP loads with the GIS analysis can be useful for identifying beneficial reservoir locations in a catchment. The study has shown that the Sulejów Reservoir has been located in a subcatchment with a largest load of the TP, and this feature helps determine the problem of reservoir eutrphication

The application of two-dimensional hydrodynamic models for underwater archaeological finds from the Vistula River in Warsaw, Poland

1 Institute of Archeology, History Department, University of Warsaw, Warsaw, Poland Department of Geography and Regional Studies, University of Warsaw, Warsaw, Poland 3 Institute of Structural Mechanics, Faculty of Civil Engineering, Cracow University of Technology, Kraków, Poland Correspondence Artur Magnuszewski, Department of Geography and Regional Studies, University of Warsaw, Krakowskie Przedmieście 30, Warsaw, Poland. Email: asmagnus@uw.edu.pl

Application of HySpex hyperspectral images for verification of a two-dimensional hydrodynamic model

ABSTRACT This 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.