Calibrated Hydrological Model for Alibeyköy Watershed in Istanbul by Using WMS and HEC-HMS


Bakırcı M., GÜLBAZ S.

9th International Symposium on Atmospheric Sciences ATMOS 2019, İstanbul, Türkiye, 23 - 26 October 2019, ss.1-8

  • Basıldığı Şehir: İstanbul
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayısı: ss.1-8

Özet

Calculating flow rate in streams by developing hydrological model is crucial to predict and to prevent floods. Flood is a natural disaster caused by the rise of the water level in the streambed. It causes loss of life and properties, especially when it occurs on high-density residential areas. One of the most important reason of the flood is meteorological events and the other reason is the human factor. Changes in the precipitation regime as a result of global warming and high density rainfall events cause floods on urban and rural areas. Therefore, the flow regimes of the stream on residential areas need to be investigated to diminish future flood damage. There are many urban flood disasters in recent years in Istanbul. This situation indicates that studies should be conducted in the flood area. In this study, a hydrological model is developed for the Alibeyköy Watershed. For this purpose, Watershed Modeling System (WMS) computer program is used to obtain satellite and digital elevation map (DEM) of the watershed. Then, Hydrologic Engineering Center-Hydrologic Modeling System (HEC-HMS) program is used to generate the hydrological model of Alibeyköy Watershed. The hydrological model is calibrated by using the precipitation and flow rate data measured previously on the watershed. The calibrated hydrological model is used for the analysis of heavy rainfall events and the maximum flow rates in the Pirinçci Stream, which is the main channel on the watershed.Calculating flow rate in streams by developing hydrological model is crucial to predict and to prevent floods. Flood is a natural disaster caused by the rise of the water level in the streambed. It causes loss of life and properties, especially when it occurs on high-density residential areas. One of the most important reason of the flood is meteorological events and the other reason is the human factor. Changes in the precipitation regime as a result of global warming and high density rainfall events cause floods on urban and rural areas. Therefore, the flow regimes of the stream on residential areas need to be investigated to diminish future flood damage. There are many urban flood disasters in recent years in Istanbul. This situation indicates that studies should be conducted in the flood area. In this study, a hydrological model is developed for the Alibeyköy Watershed. For this purpose, Watershed Modeling System (WMS) computer program is used to obtain satellite and digital elevation map (DEM) of the watershed. Then, Hydrologic Engineering Center-Hydrologic Modeling System (HEC-HMS) program is used to generate the hydrological model of Alibeyköy Watershed. The hydrological model is calibrated by using the precipitation and flow rate data measured previously on the watershed. The calibrated hydrological model is used for the analysis of heavy rainfall events and the maximum flow rates in the Pirinçci Stream, which is the main channel on the watershed.

Calculating flow rate in streams by developing hydrological model is crucial to predict and to prevent floods. Flood is a natural disaster caused by the rise of the water level in the streambed. It causes loss of life and properties, especially when it occurs on high-density residential areas. One of the most important reason of the flood is meteorological events and the other reason is the human factor. Changes in the precipitation regime as a result of global warming and high density rainfall events cause floods on urban and rural areas. Therefore, the flow regimes of the stream on residential areas need to be investigated to diminish future flood damage. There are many urban flood disasters in recent years in Istanbul. This situation indicates that studies should be conducted in the flood area. In this study, a hydrological model is developed for the Alibeyköy Watershed. For this purpose, Watershed Modeling System (WMS) computer program is used to obtain satellite and digital elevation map (DEM) of the watershed. Then, Hydrologic Engineering Center-Hydrologic Modeling System (HEC-HMS) program is used to generate the hydrological model of Alibeyköy Watershed. The hydrological model is calibrated by using the precipitation and flow rate data measured previously on the watershed. The calibrated hydrological model is used for the analysis of heavy rainfall events and the maximum flow rates in the Pirinçci Stream, which is the main channel on the watershed.