Application of Remote Sensing in Monitoring Unsustainable Wetlands: Case Study Hamun Wetland
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RESEARCH ARTICLE
Application of Remote Sensing in Monitoring Unsustainable Wetlands: Case Study Hamun Wetland Saeideh Maleki1 • Alireza Soffianian2 • Saeid Soltani Koupaei2 • Sassan Saatchi3 • Saeid Pourmanafi2 Received: 22 May 2017 / Accepted: 21 August 2018 Indian Society of Remote Sensing 2018
Abstract Monitoring wetland as one of the important parts of the global ecosystem is necessary for conservational programs. But, usually, collecting in situ data is restricted in these areas because of their remote locations, vast area and dynamic conditions. Remote sensing provides a cost effective tool to investigate hydrological patterns and the seasonal trend of changes in wetlands. In this paper, Land-use/land-cover change during water inundation period of Hamun wetland was investigated in order to determine change trend during this period. Hamun wetland is an unsustainable ecosystem, and monitoring this wetland is essential for conservation goals. This trend is critical for decision makers in order to plan the conservational scheme in all unsustainable ecosystems. To reach this objective, the land-use/land-cover maps during inundation period of Hamun were produced using Landsat 8 time series images. The results of accuracy assessment showed the classification of water and vegetation have the highest accuracy (94% and 93%, respectively). And the accuracy of plants in the water classes was the lowest (water–veg = 89.9%, veg–water 1 = 88.8%, veg–water 2 = 87.6%). This means the higher misclassification is in determining the vegetation in the water. Then, the changes in the land-cover classes in relation to wetland inundation were investigated. Results of land-use/land-cover change illustrate the regions that were suitable for water birds but lost their suitability when the wetland dried out. These areas are crucial for water bird’s conservation. Satellite data determined these areas with acceptable accuracy. Keywords Wetland monitoring Unsustainable ecosystems Change detection Suitable habitats Land use Land cover Migratory bird
Introduction
& Saeideh Maleki [email protected] Alireza Soffianian [email protected] Saeid Soltani Koupaei [email protected] Sassan Saatchi [email protected] 1
Department of Natural Resources, University of Zabol, Zabol, Iran
2
Department of Natural Resources, Isfahan University of Technology, Isfahan, Iran
3
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
Wetlands are between the most diverse and valuable ecosystems (Cardona et al. 2013). Providing clean water, preventing floods and enhancing biological diversity are some of their valuable functions. Many wetlands in the world have experienced significant changes in their size, morphology and ecology (Bayley 1995; Thorley et al. 1997). The major reasons of these changes are climate change and human activities (Feng et al. 2010; Halls 1997), especially in the arid area. Because water is the most important limitation in the arid area, drought is the reason for changing wa
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