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A remotely sensed tracking of forest cover and associatedtemperature change in margalla hills

International Journal of Digital Earth 2019年第10期12卷 1133-1150页

作者： Noora Khalid Saleem Ullah Sheikh Saeed Ahmad Asad Ali Farrukh Chishtie Department of Space Science Institute of Space TechnologyIslamabadPakistan Department of Environmental Sciences Fatima Jinnah Women UniversityRawalpindiPakistan

Worldwide, forest degradation is a serious environmental issue, and inPakistan, forest wealth is depleting at the highest rate in South Asia. Toensure sustainable development goals of environmental stewardship,social development and economic growth, a sound monitoring andregulatory mechanism is essential for tracking forest cover changes. Thisstudy aims to quantify the decline of forest reserves and associatedtemperature variations in a relatively unexplored biodiversity hotspot ofIslamabad, margalla hills National Park (MHNP). Imagery acquired byLandsat TM (Thematic Mapper) for the year 1992, 2000 and 2011 areused to assess the spatial and temporal changes occurred over the lasttwo decades (from 1992 to 2011). A robust hybrid-classification routineis implemented to monitor the changes in forest cover and ANOVAalong with Tukey’s HSD (Honestly Significant Difference) test is used totest the significance of temperature variation associated with a shift inland cover classes. The results showed a significant growth insettlements, agricultural area and barren soil whereas water body, lowervegetation, scrub and pine forest are diminishing. In both decades, thetemperature alteration associated with a change in land cover classesare statistically significant (confirmed by ANOVA and Tukey’s HSD tests)for most of the land use/land cover classes. Based on these findings, thisstudy concludes that forests are dwindling at MHNP and the degradingcondition of the forest is below par and necessitates the promotion ofconservation practices to minimize ecological disturbances.

关键词： margalla hills Landsat thematic mapper(Landsat TM) forest cover change hybrid classification land cover classes ANOVA Tukey’s HSD

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