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Eco-hydrological wetland monitoring in a semi-arid region: A case study of Konya Closed Basin, Turkey

Thakur, Jay Krishna (2010) Eco-hydrological wetland monitoring in a semi-arid region: A case study of Konya Closed Basin, Turkey.

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Abstract:Wetlands are considered the most biologically diverse, fertile and productive ecosystems on earth. A common problem, the desertification of wetland is mainly because of water scarcity due to global warming, depletion of groundwater aquifer, construction of extensive drainage canal networks, and reservoirs on rivers feeding wetlands, etc. In Turkey, the Lake Tuz basin, undergoing desertification, has lost 60 % of its water over the past 18 years. The wetlands ecosystem, surrounding the lake Tuz, has rainfall and ground water recharge as hydrological inflow where as evapotranspiration as hydrological outflow. The eco-hydrological monitoring of the wetlands gives a clear picture of its dynamics in relation with the surrounding environment. The objective of this study was to monitor eco-hydrological variables by quantifying actual evapotranspiration (ETa) and normalized deviation vegetation index (NDVI) as hydrological and ecological variables in the wetlands. To estimate ETa and NDVI spatio-temporally utilizing earth observation data, field visit and time series analysis was done. For the quantification of ETa spatiotemporally, the MODerate-resolution Imaging Spectroradiometer (MODIS) data was used for the year 2000, 2004 and 2008. Image pre-processing and SEBS processing were carried out to calculate the energy fluxes and ETa. Time series of ETa spatial distribution have been made for different 12 habitat types in the wetland. To study ecological dynamics of spatio-temporally for different habitat types in the wetlands, NDVI, MODIS-derived vegetation index was used for the year 2000 to 2008. The ETa and NDVI was inter and intra related with other meteorological variables to have better understanding of dynamics of the wetlands ecosystem. The results of the study were that the ETa and NDVI for various habitat types have declining trend over the year 2000 to 2008. The annual mean rainfall and class A pan evaporation in the study area also had declining trend during overall study period. This indicates that the wetlands of Konya closed basin in the semi – arid region are in the process of desertification.
Item Type:Essay (Master)
Faculty:ITC: Faculty of Geo-information Science and Earth Observation
Programme:Geoinformation Science and Earth Observation MSc (75014)
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