Estimation of Polder Retention Capacity Based on ASTER, SRTM and LIDAR DEMs: The Case of Majdany Polder (West Poland)

Zbigniew Walczak,Rafał Wróżyński,Ireneusz Laks,Mariusz Sojka

doi:10.3390/w8060230

Zbigniew Walczak, Rafał Wróżyński + Show 2 more

Open Access

https://doi.org/10.3390/w8060230

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Journal: Water	Publication Date: May 28, 2016
Citations: 23	License type: CC BY 4.0

Affiliation: University of Life Sciences in Poznań

Abstract

This study compares four digital elevation models (DEMs), based on various data sources, to define polder retention capacities. Two commercial and two publically available, free of charge data sources were used. Commercial sources are DEMs based on aerial images and LIDAR (Light Detection and Ranging) data. Free data source DEMs generated are based on: SRTM (Shuttle Radar Topography Mission) and ASTER GDEM (ASTER Global Digital Elevation Model). In addition, the impact of the spatial resolution of the numerical terrain model on the calculated polder volume was evaluated. A DEM based on LIDAR data was used as the reference model and was supplemented with our own geodetic GPS (Global Positioning System) measurements. In flood modeling and management, including retention of river valleys and polders, it is necessary to properly estimate their capacity and the relation between capacity and water level. The study showed the impact of quantitative and qualitative data sources in determining the retention capacity of a polder.

Highlights

Digital elevation models (DEMs) are often used to estimate the capacities of natural flood valleys and polders, as well as flood threats [1,2,3,4,5,6]
For the LIDAR-DEM and LIDAR-DEM and Airborne-DEM, polder models were created at spatial resolutions of 5, 10, 25, 50, Airborne-DEM, polder models were created at spatial resolutions of 5, 10, 25, 50, 50 and 100 m
Thereafter, the polder volume and flood zone were calculated for each model

Summary

Introduction

Digital elevation models (DEMs) are often used to estimate the capacities of natural flood valleys and polders, as well as flood threats [1,2,3,4,5,6]. The polders in Poland were created mainly in the valleys of the largest rivers: Vistula, Oder and Warta. These polders are an important factor influencing the transformation of a flood wave. The accurate estimation of the polder volume is of particular importance, and the water that is stored in its area correlates with the decreasing of the flood wave and the mitigation of the threat of embankment breaks. Polders are often intersected by channels and ditches to ensure the gravitational drainage of the excess water

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