Assessment and zoning of economic damage risk due to the inundation in Thu Duc City on the period 2021-2022

Abstract

Thu Duc City directly under Ho Chi Minh City was established in 2020 on the basis of merging 3 districts (Thu Duc District, District 2 and District 9). Since its establishment, Thu Duc City has faced widespread urban flooding caused by both rain and tides. The impacts of urban flooding cause many adverse influences on people living and trading in the Thu Duc City. Inheriting the study on economic damage due to inundation in Ho Chi Minh City in the period 2016-2019, the project inherits the survey forms to conduct surveys and the flood’s and damage’s formulas to assess economic losses of people living there. The surveys of the inundation and the economic damages caused by floods are implemented in all wards of Thu Duc City in the period 2021-2022. The results of the study show that the distribution of inundation, economic damage level as well as the flood-damage risk level due to the inundation are concentrated in densely populated areas and riverside areas. It also shows that the level of economic damage in the period 2021-2022 is much reduced compared to the period 2016-2019 by about 25-30% and at the low level. The main reasonable of explanation about the reduction of risk level in the period 2021-2022 is the decrease of City’s economic due to the serious disease Covide 19. The citizen’s incomes reduced. Their works are delayed and the movement limitted. So that, the indirect economic damages also significantly being lower than the previous. Through establishing a flood and damage survey form, the study hopes to update more information and contribute a "way" to assess damage caused by floods directly to the urban management agencies of Thu Duc City.