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:: Volume 9, Issue 4 (6-2020) ::
JGST 2020, 9(4): 61-78 Back to browse issues page
study bird’s migration by using remote sensing and Geographic Information System. (case study of bird’s migration in the alikhan wetland)
GH. R. Fallahi, M. Molavi Vardanjani *
Abstract:   (46 Views)
of this Research is the study and evaluation of the relationship between vegetation area and water area with the number of birds in Band-e-Alikhan wetland between 2011 and 2015. Due to the importance of Band-e-Alikhan wetland as a seasonal wetland with fresh water, which is located 35 km south of Varamin city, it has been used as a study area. In the present study, first, the necessary pre-processing, ie radiometric corrections, which include atmospheric corrections, banding errors, etc., were performed on Landsat 7 and 8 images, and then the normalized differential plant index maps (NDVI) and water index. Normalized difference (NDWI) was generated using pre-processed images. Then, by examining the histogram of plant and water indicators produced for each year, the appropriate threshold for each index was selected and by limiting the threshold on plant and water indicators produced, vegetation and water area maps were obtained for the year, respectively. . Each year, the maps obtained by the reference data selected manually in this study by satellite imagery were evaluated, the results of which show that the average overall accuracy and capability coefficient of vegetation surface extraction and of water over five years, with89/37% and 81/89%, which demonstrates the successful extraction of these parameters are. By obtaining the effective parameters, ie the level of vegetation and water, between the number of birds and the effective parameters of linear regression, two variables were formed and its coefficients were estimated by the least squares method. The results of studies and evaluations show that the model and regression formed between the number of birds and the parameters of vegetation surface and water area have a coefficient of determination of 0.861 and an adjusted coefficient of determination of 0.582 and indicate the appropriate fit of regression. Then, by the obtained coefficients and regression, the number of birds in 1394 was estimated using the level of vegetation and water area of the same year and was compared with the actual amount of birds in 1394, the results of which showed that the bird population is 93 . 1. It is predicted. The results also show that changes in the environmental conditions of the wetland provide a clear response to changes in bird populations and bird migration.
Keywords: Vegetation, Water Bodies, Wetlands Band NDWI, Alikhan, NDVI, Linear Regression, Migrating Birds
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Type of Study: Research | Subject: GIS
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Fallahi G R, Molavi Vardanjani M. study bird’s migration by using remote sensing and Geographic Information System. (case study of bird’s migration in the alikhan wetland). JGST. 2020; 9 (4) :61-78
URL: http://jgst.issge.ir/article-1-644-en.html


Volume 9, Issue 4 (6-2020) Back to browse issues page
نشریه علمی علوم و فنون نقشه برداری Journal of Geomatics Science and Technology