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Despite covering only 2–6% of land, wetland ecosystems play an important role at the local and global scale. They provide various ecosystem services (carbon dioxide sequestration, pollution removal, water retention, climate regulation, etc.) as long as they are in good condition. By definition, wetlands are rich in water ecosystems. However, ongoing climate change with an ambiguous balance of rain in a temperate climate zone leads to drought conditions. Such periods interfere with the natural processes occurring on wetlands and restrain the normal functioning of wetland ecosystems. Persisting unfavorable water conditions lead to irreversible changes in wetland habitats. Hence, the monitoring of habitat changes caused by an insufficient amount of water (plant water stress) is necessary. Unfortunately, due to the specific conditions of wetlands, monitoring them by both traditional and remote sensing techniques is challenging, and research on wetland water stress has been insufficient. This paper describes the adaptation of the thermal water stress index, also known as the crop water stress index (CWSI), for wetlands. This index is calculated based on land surface temperature and meteorological parameters (temperature and vapor pressure deficit—VPD). In this study, an unmanned aerial system (UAS) was used to measure land surface temperature. Performance of the CWSI was confirmed by the high correlation with field measurements of a fraction of absorbed photosynthetically active radiation (R = −0.70) and soil moisture (R = −0.62). Comparison of the crop water stress index with meteorological drought indices showed that the first phase of drought (meteorological drought) cannot be detected with this index. This study confirms the potential of using the CWSI as a water stress indicator in wetland ecosystems.
Wojciech Ciężkowski; Sylwia Szporak-Wasilewska; Małgorzata Kleniewska; Jacek Jóźwiak; Tomasz Gnatowski; Piotr Dąbrowski; Maciej Góraj; Jan Szatyłowicz; Stefan Ignar; Jarosław Chormański. Remotely Sensed Land Surface Temperature-Based Water Stress Index for Wetland Habitats. Remote Sensing 2020, 12, 631 .
AMA StyleWojciech Ciężkowski, Sylwia Szporak-Wasilewska, Małgorzata Kleniewska, Jacek Jóźwiak, Tomasz Gnatowski, Piotr Dąbrowski, Maciej Góraj, Jan Szatyłowicz, Stefan Ignar, Jarosław Chormański. Remotely Sensed Land Surface Temperature-Based Water Stress Index for Wetland Habitats. Remote Sensing. 2020; 12 (4):631.
Chicago/Turabian StyleWojciech Ciężkowski; Sylwia Szporak-Wasilewska; Małgorzata Kleniewska; Jacek Jóźwiak; Tomasz Gnatowski; Piotr Dąbrowski; Maciej Góraj; Jan Szatyłowicz; Stefan Ignar; Jarosław Chormański. 2020. "Remotely Sensed Land Surface Temperature-Based Water Stress Index for Wetland Habitats." Remote Sensing 12, no. 4: 631.
Maciej Góraj; Cezary Wróblewski; Wojciech Ciężkowski; Jacek Jóźwiak; Jarosław Chormański. Free water table area monitoring on wetlands using satellite and UAV orthophotomaps – Kampinos National Park case study. Meteorology Hydrology and Water Management 2019, 7, 1 .
AMA StyleMaciej Góraj, Cezary Wróblewski, Wojciech Ciężkowski, Jacek Jóźwiak, Jarosław Chormański. Free water table area monitoring on wetlands using satellite and UAV orthophotomaps – Kampinos National Park case study. Meteorology Hydrology and Water Management. 2019; 7 (1):1.
Chicago/Turabian StyleMaciej Góraj; Cezary Wróblewski; Wojciech Ciężkowski; Jacek Jóźwiak; Jarosław Chormański. 2019. "Free water table area monitoring on wetlands using satellite and UAV orthophotomaps – Kampinos National Park case study." Meteorology Hydrology and Water Management 7, no. 1: 1.
The research carried out concerned the laboratory assessment of the applicability of the Crop Water Stress Index (CWSI) as a practical tool for assessing the risk of desiccation for selected wetland habitats: transition mires and quaking bogs as well as alkaline fens. The analysis was carried out on 3 soil samples with a vegetation cover (with the dimensions of 40×40×30 cm) collected during the full vegetation season for each mentioned habitat, with a characteristic species composition. Experimental research was carried out between 17th May 2018 and 19th June 2018. Thermal, RGB and multispectral images, chlorophyll content, volumetric soil moisture, air temperature and relative humidity measurements were taken for each sample every two days. The obtained results clearly indicate the dependence between CWSI and plant condition parameters in the first phase of desiccation. At the same time, as a result of the observations taken, thresholds have been set, indicating different desiccation phases.
Maciej Góraj; Wojciech Ciężkowski; Piotr Sikorski; Małgorzata Kleniewska; Sylwia Szporak-Wasilewska; Jacek Jóźwiak; Tomasz Gnatowski; Jan Szatyłowicz; Jarosław Chormański. Characterizing Selected Wetland Habitats’ Desiccation Phenomena Using the Crop Water Stress Index. 2018, 1 .
AMA StyleMaciej Góraj, Wojciech Ciężkowski, Piotr Sikorski, Małgorzata Kleniewska, Sylwia Szporak-Wasilewska, Jacek Jóźwiak, Tomasz Gnatowski, Jan Szatyłowicz, Jarosław Chormański. Characterizing Selected Wetland Habitats’ Desiccation Phenomena Using the Crop Water Stress Index. . 2018; ():1.
Chicago/Turabian StyleMaciej Góraj; Wojciech Ciężkowski; Piotr Sikorski; Małgorzata Kleniewska; Sylwia Szporak-Wasilewska; Jacek Jóźwiak; Tomasz Gnatowski; Jan Szatyłowicz; Jarosław Chormański. 2018. "Characterizing Selected Wetland Habitats’ Desiccation Phenomena Using the Crop Water Stress Index." , no. : 1.
This study is focused on adaptation of the water stress index to make use of it on bogs and mires of temperate transitional climate zone. Investigated object is located in Janowskie Forest Landscape Park (south-east Poland), area protected within Natura 2000 network and recognized as habitat 7140 (transition mires and quaking bogs). In order to obtain dataset UAV flights with thermal camera and airborne mission with hyperspectral sensor were performed. Field measurements included collection of both meteorological and biophysical parameters. It is shown that CWSI is a promising method for monitoring of water stress on Natura 2000 habitats.
Wojciech Ciężkowski; Jacek Jozwiak; Sylwia Szporak-Wasilewska; Piotr Dąbrowski; Małgorzata Kleniewska; Maciej Goraj; Jaroslaw Chormanski. Water Stress Index for Bogs and Mires Based on UAV Land Surface Measuremnts and Its Dependency on Airborne Hyperespectral Data. IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium 2018, 9257 -9260.
AMA StyleWojciech Ciężkowski, Jacek Jozwiak, Sylwia Szporak-Wasilewska, Piotr Dąbrowski, Małgorzata Kleniewska, Maciej Goraj, Jaroslaw Chormanski. Water Stress Index for Bogs and Mires Based on UAV Land Surface Measuremnts and Its Dependency on Airborne Hyperespectral Data. IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium. 2018; ():9257-9260.
Chicago/Turabian StyleWojciech Ciężkowski; Jacek Jozwiak; Sylwia Szporak-Wasilewska; Piotr Dąbrowski; Małgorzata Kleniewska; Maciej Goraj; Jaroslaw Chormanski. 2018. "Water Stress Index for Bogs and Mires Based on UAV Land Surface Measuremnts and Its Dependency on Airborne Hyperespectral Data." IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium , no. : 9257-9260.
The main objective of this study is to evaluate the changes in the hydrographic network of Słowiński National Park. The authors analysed the changes occurring in the drainage network due to limited maintenance in this legally protected natural area. To accomplish this task, elaborations prepared on the basis of aerial photographs were used: an orthophoto map from 1996, hyperspectral imaging from June 2015, and a digital terrain model based on airborne laser scanning (ALS) from June 2015. These spatial data resources enabled the digitisation of the water courses for which selected hydro-morphological features had been defined. As a result of analysing the differences of these features, a quality map was elaborated which was then subjected to interpretation, and the identified changes were quantified in detail.
Maciej Góraj; Marcin Kucharski; Krzysztof Karsznia; Izabela Karsznia; Jarosław Chormański. Changes in a hydrographic network of the Słowiński National Park in terms of photogrammetric analyses. Miscellanea Geographica 2017, 21, 197 -204.
AMA StyleMaciej Góraj, Marcin Kucharski, Krzysztof Karsznia, Izabela Karsznia, Jarosław Chormański. Changes in a hydrographic network of the Słowiński National Park in terms of photogrammetric analyses. Miscellanea Geographica. 2017; 21 (4):197-204.
Chicago/Turabian StyleMaciej Góraj; Marcin Kucharski; Krzysztof Karsznia; Izabela Karsznia; Jarosław Chormański. 2017. "Changes in a hydrographic network of the Słowiński National Park in terms of photogrammetric analyses." Miscellanea Geographica 21, no. 4: 197-204.