Geophysical Research Abstracts Vol. 21, EGU2019-7655-1, 2019 EGU General Assembly 2019 © Author(s) 2019. CC Attribution 4.0 license.

Flood Vernability Mapping Using Field Observation and Q GIS Techique - A Case Study of Dhanera City, ,

Vishal Asnani (1), Bhaghirath Chaudhary (1), Ajay Barad (1), Dhruvesh Patel (1), Cristina Prieto (2), and Dawei Han (3) (1) Department of Civil Engineering, School of Technology, Pandit Deendayal Petroleum University (PDPU), Gandhinagar, Gujarat, India, (2) Environmental Hydraulics Institute “IH Cantabria”, University of Cantabria, Santander, Spain., (3) Department of Civil Engineering, University of Bristol, Bristol, UK

Spatial changes in rainfall are observed in India since the past few years due to climate change and associated changes in the Indian summer monsoon circulation and the general atmospheric circulation. This indicates the increase in rainfall parameter in western zone. Effect of this phenomenon is started to reflect in the semi-arid region of Gujarat and ; a drought-prone region which experienced severe flash floods in the years 2017 and 2015. This study aims to produce the flood vulnerability map using the field observation and open source Q GIS techniques. Dhanera city which are situated at the bank of Rel River at was affected by flood in 2017. The single flood event leads a catastrophic disaster at Dhanera City, resulted near about 218 people was died and loss of the property worth Euro 24.73 million. The city was under an inundation of 2.57 in Meter. whereas different sub-hubs of Dhanera city was under an inundation of 75-80 %. To identify the flood vulnerability and depth of the flood water, near about 18 HFL are marked using the GPS techniques. Q GIS open sources software has been used to produce the flood Depth map of the city. Identified the flood vulnerability in high, low and medium category. In future, a developed map will be utilized to produce the ‘Emergence Action Plan (EAP)’ for Dhanera City. The developed map will act as source map for validation of an output of a 2D hydrodynamic model for Dhanera City.