Damage Assessment of Rice Production from Flooding Closed Chi River in Maha Sarakham Province

Abstract

The flood victim around Chi River affected to damage the rice fields in a wide.The study aimed to measure flood area, classify rice field, and evaluate damage of the rice yields from flood victim in 2011 and 2017 by Landsat 5 and Sentinel-2 to prepare the image data using radiation and geometric correction. After that, flood
area and the rice fields were identified by Object-based Image Analysis (OBIA) withHierarchy classification andNearest Neighbor Classifier (NN). The evaluated damage of rice from flood area with actual yield data per rai were conducted. In the results, flood map was 95.5 and 96.5%. The rice field maps were 93 and 94%. The damaging of rice yields found that there were 131,855.87 rai as 993,716,766.87 baht in 2011 caused by the effect of tropical storm made the higher rainfall overflowing in a wide area. In 2017, there were the damaging around 88,420.35 rai of 430,829,683.34 baht. Mostly areas have low plains and there are contributed to create the flap blocking in some areas and the rice fields has decreased. In addition, in the present has decreased damage.The result can be a database for the relevant authorities use planning decisions to assist agriculturists who have been damaged.