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ABSTRACT
The flood experienced in Nnewi, Anambra state is so much that it is expected that the area will have a high soil moisture content. This study is focused on the application of remotely sensed multispectral electromagnetic data to characterize soil moisture content of Nnewi local government area, Anambra state. The study utilized Landsat-8 Operational Land Imager (OLI) thermal infrared satellite data to estimate the soil moisture index (SMI) of Nnewi local government area for the period between 2016 to 2023. Images were downloaded from the USGS Earth Explorer web application for the dry of the years 2016, 2017, 2019, 2020, 2021, 2022 and 2023 and the wet season of 2016, 2022 and 2023. Image processing to estimate the SMI was done using the ArcGIS 10.7.1 software. The results from the study revealed from the dry season data that the soil moisture index has been increasing at an approximate percentage of 7.2% yearly since 2016, from a mean value of 0.22 in 2016 to 0.35 in 2023. The soil moisture content during rainy season was also on the increase base on the analysis made as the SMI for 2016 was 0.10 while the SMI for 2022 and 2023 were 0,39 and 0.34 respectively.
