Estimating Advance of Built-Up Area in Desert-Oasis Ecotone of Cholistan Desert Using Landsat

被引:5
|
作者
Ullah, Sami [1 ]
Shi, Yan [1 ]
Dasti, Muhammad Yousaf Sardar [1 ]
Wajid, Muhammad [1 ]
Saqib, Zulfiqar Ahmad [2 ,3 ]
机构
[1] Cent South Univ, Sch Geosci & Info Phys, Changsha 410012, Peoples R China
[2] Univ Agr Faisalabad, Inst Soil & Environm Sci, Faisalabad 38040, Pakistan
[3] Natl Ctr GIS & Space Applicat NCGSA, Agr Remote Sensing Lab, Islamabad 44000, Pakistan
基金
国家重点研发计划;
关键词
remote sensing; land use; land cover; arid; ecosystem; desert; DYNAMICS;
D O I
10.3390/land12051009
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
There have been few attempts to estimate the effects of land use and land cover (LULC) on ecosystem services in desert-oasis ecotones, which are recognized as critical ecological barriers and buffers that prevent deserts from expanding into oases. This research investigated how remote sensing and geographic information technology may be used to monitor changes in LULC in the Cholistan desert and the Bahawalpur region of Pakistan between the years 2015 and 2022. The objective of this research was to identify thematic and statistical shifts in LULC in the study area due to various human interventions in the area. Landsat-8 images were processed using the maximum likelihood supervised classification technique using 500 training samples to categorize the study area into four LULC classes, i.e., desert/barren land, waterbodies, vegetation, and built-up areas, with an overall accuracy of 93% and 98% for 2015 and 2022, respectively. Results indicate a significant expansion in built-up area in 2022, which is up to 43%, agriculture and vegetation area declined by 8%, waterbodies decreased by 41%, and desert area decreased by 2% when compared with 2015. The change detection approach revealed that agricultural land was directly encroached on by rapidly increasing built-up area and urbanization as the area had an overall 19% rise in population growth within eight years with an annual growth rate of more than 3%. This study will be helpful to assess the quantity of spatial and temporal changes in the desert ecosystem, which is usually ignored by policymakers and governments due to less economic activity, although it plays a huge role in biodiversity conservation and balancing the regional ecosystem.
引用
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页数:13
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