Changjiang Liuyu Ziyuan Yu Huanjing/Resources and Environment in the Yangtze Valley

About the Journal

Download [This article belongs to Volume - 40, Issue - 01]

Abstract : This study applied remote sensing and GIS techniques to quantify the impacts of land use changes on forest resources in Sanniquelleh-Mehn District, Nimba County, Liberia. The study area's extensive anthropogenic activities, such as tree logging, iron ore mining, and expansion of agricultural land along with population growth, make it especially vulnerable to forest disturbance. Satellite images were collected from Landsat 7, ETM+; Lasdsat 5, TM; Lasnssat 9, LOI-2 for 2002, 2012, and 2022, respectively. A supervised image classification was performed to analyze the land use change during this period. The study reveals alarming trends in land use changes. The percentage of land covered by forest cover decreased significantly from 97.85% in 2002 to 72.09% in 2022. Mining operations, urbanization, and agricultural growth are recognized as the main forces behind this shift. Over the same period, built-up areas quadrupled from 3.16% to 12.66%, indicating the expanding urban sprawl driven by population influx. Moreover, there was a significant increase in agriculture, increasing from 2.87 km² (0.30%) in 2002 to 127.56 km² (13.48%) in 2022. The study also presents a land use change matrix, which thoroughly comprehends the conversion dynamics between various land use categories. The results highlight how critical it is to implement strategic land-use planning to address the environmental problems brought on by ongoing habitat loss, deforestation, and fragmentation. Accurate monitoring and modeling of land usage patterns is made possible by combining high-definition satellite imagery and cutting-edge GIS technologies. This provides insightful information for sustainable land management in dynamic environments such as the Sanniquelleh-Mehn District.