Abstract
Analyses of riverbed shape evolution are crucial for environmental protection and local water management. For narrow rivers located in forested, mountain areas, it is difficult to use remote sensing data used for large river regions. We performed a study of the Prądnik River, located in the Ojców National Park (ONP), Poland. A multitemporal analysis of various data sets was performed. Light detection and ranging (LiDAR)-based data and orthophotomaps were compared with classical survey methods, and 78 cross-sectional profiles were done via GNSS and tachymetry. In order to add an extra time step, the old maps of this region were gathered, and their content was compared with contemporary data. The analysis of remote sensing data suggests that they do not provide sufficient information on the state and changes of riverbanks, river course or river depth. LiDAR data sets do not show river bottoms, and, due to plant life, do not document riverbanks. The orthophotomaps, due to tree coverage and shades, cannot be used for tracking the whole river course. The quality of old maps allows only for general shape analysis over time. This paper shows that traditional survey methods provide sufficient accuracy for such analysis, and the resulted cross-sectional profiles can and should be used to validate other, remote sensing, data sets. We diagnosed problems with the inventory and monitoring of such objects and proposed methods to refine the data acquisition.
Highlights
River morphology studies, including riverbed analyses, are carried out by researchers in many different fields, as they are crucial for assessing flood risks, maintaining ecological balance and protecting the environment [1,2]
None of the data sets could be used for measuring the water floor—topographic Light Detection and Ranging (LiDAR) does not allow for accurate measurements through water, and no other application, for example, bathymetric LiDAR, was used to provide this data, the ISOK data set is incomplete regarding flood monitoring and prediction
The main aim of this study was to evaluate the previous and current shape of the Prądnik River—a small alluvial river surrounded by significantly higher limestone outcrops and wood
Summary
River morphology studies, including riverbed analyses, are carried out by researchers in many different fields, as they are crucial for assessing flood risks, maintaining ecological balance and protecting the environment [1,2]. These studies include riverbed shape, which will be described in this paper, velocity of water, transportation and accumulation analysis etc. Changes may be caused by climate, erosion, sediment transportation and accumulation [10], and anthropogenic factors, e.g., the construction of dams and platforms [11] etc. As river characteristics vary depending on numerous geomorphological, climate and anthropogenic factors, different methods may be implemented, in order to monitor riverbed shapes
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
