6. Application of remote sensing in monotoring suspended sediment cocentration in the Nhue - Day river downstream

Khoa Thi Văn, Quang Nguyễn Tiến


Remotely sensed data can be helpful for monitoring Suspended Sediment Concentration (SSC) in small rivers to improve the spatial coverage of the monitoring in addition to conventional gauging stations. The utilization of data, collected by the instruments on board of satellites, to understand physical information of small inland water bodies is a significant challenge. The literature provides several research of using space-borne remote sensing to obtain understandings in term of water quality, but constraints regarding image resolution prevent them from implementing studies in small river systems. In this study, a new algorithm was developed to quickly determine the values of SSC in a small river in Northern Vietnam from data of the Operational Land Imager (OLI) sensor on board of Landsat 8. Water reflectance and in-situ data were compared with a regression analysis to specify the bandwidth with the best correlation to the SSC concentration in the river. Band 3 (Green) and Band 4 (Red) were found to be good SSC indicators with a SSC range approximately from 15 to 120 mg/l. The empirical formulas SSC (mg/l) = 4.853B4 – 4.493 and SSC (mg/l) = 6.511*B3 – 16.581 with B4 and B3 is the reflectance of Band 4 and Band 3 in percentage respectively appearing to provide a relatively accurate SSC estimate from Landsat OLI images in the study area.

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Khoa Thi Văn
tvlkhoa@hunre.edu.vn (Primary Contact)
Quang Nguyễn Tiến
Thi Văn, K., & Nguyễn Tiến, Q. (2017). 6. Application of remote sensing in monotoring suspended sediment cocentration in the Nhue - Day river downstream. Science Journal of Natural Resources and Environment, (16), 45–56. Retrieved from https://tapchikhtnmt.hunre.edu.vn/index.php/tapchikhtnmt/article/view/31

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