نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار گروه جغرافیای دانشگاه گلستان، گرگان، ایران
2 دانشجوی کارشناسی ارشد مخاطرات محیطی دانشگاه گلستان، گرگان، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Monitoring of flood expansion maps using radar images (SAR) (Case study: Flood Flood in March 2019, Aq Qala city)
Abstract
Floods are one of the most important hazards that depending on the intensity of rainfall and other effective factors cause great damage to urban and rural areas.
The use of radar data is one of the newest and most effective methods in flood study.
The exact details of the floods can be studied and the extent of their spread can be determined so that it can be used in future planning.
In this study, the flooded areas of Aqqala city and the surrounding villages have been identified by Sentinel 1 data from March 23 to April 4.The aim of this study is to produce maps that extract flood spread from radar (sar) images and show the extent of flood spread in April 2017.Snap, arcgis and envi software have been used as research tools.
The results of the research showed that on March 23, 115 square kilometers in the study area and on March 29, 107 square kilometers were submerged due to floods in April 1998. Also, the results of radar images and field visits showed that the main reasons for flooding in the area, heavy rainfall in a few days, flooding of the dam, low slope, lack of river dredging, high bridges on the river and low height of bridges and high percentage of clay in The soil of the area has been.
Keywords: Flood, Radar Images, Sentinel 1, Gorganrood River, Aq Qala
کلیدواژهها [English]
منابع