Dam sediment tracking using spectrometry and Landsat 8 satellite image, Taleghan Basin, Iran

Environmental Monitoring and Assessment
Sirous AfsharBahram Saghafian

Abstract

Sedimentation in reservoirs, in addition to reducing water storage capacity, causes serious environmental impacts including intensification of river erosion. Detection of sediment origins plays a determining role in control and prevention of sedimentation. Nowadays, with the help of studies on sedimentation and erosion, sediment origins can be detected with high accuracy. This research integrated geographic information system (GIS) and remote sensing (RS) techniques to detect the primary source of sediment to Taleghan Dam in northern Iran. After collecting samples of sediment from the basin outlet, they were divided into two parts. One part was sent to the Mineralogy Laboratory in order to determine the percentage of each mineral in the samples using X-ray. A few were sent to the Spectroscopy Laboratory to determine their spectral signature using the spectrometer. The laboratory test results determined the wavelength of the minerals. In the next step, those spots on the satellite image whose spectral reflectance fell within the spectral signature of the minerals were detected and enhanced by mixture-tuned matched filtering (MTMF) method. These spots were overlapped with the map of geological formations. Accordingly, the origin ...Continue Reading

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Jun 13, 2019·Biology Letters·Shoko Sugasawa, Hiroyoshi Higuchi
Sep 24, 2020·Global Change Biology·Kristin L LaidreBenjamin R Cohen

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