Analysis of riverbank changes in Ho Chi Minh city in the period 1989 – 2015

Thu Trang Hoang, Khoi Nguyen Dao, Loi Thi Pham, Hong Van Nguyen
2019 Science & Technology Development Journal - Science of The Earth & Environment  
The objective of this study was to analyze the changes of riverbanks in Ho Chi Minh City for the period 1989-2015 using remote sensing and GIS. Combination of Modified Normalized Difference Water Index (MNDWI) and thresholding method was used to extract the river bank based on the multi-temporal Landsat satellite images, including 12 Landsat 4-5 (TM) images and 2 Landsat 8 images in the period 1989-2015. Then, DSAS tool was used to calculate the change rates of river bank. The results showed
more » ... e results showed that, the processes of erosion and accretion intertwined but most of the main riverbanks had erosion trend in the period 1989-2015. Specifically, the Long Tau River, Sai Gon River, Soai Rap River had erosion trends with a rate of about 10.44 m/year. The accretion process mainly occurred in Can Gio area, such as Dong Tranh river and Soai Rap river with a rate of 8.34 m/year. Evaluating the riverbank changes using multi-temporal remote sensing data may contribute an important reference to managing and protecting the riverbanks.
doi:10.32508/stdjsee.v2i2.496 fatcat:epavnvdkxzhnhdqfkwqjcco5jq