Past and future land use/land cover changes from multi-temporal Landsat imagery in Mpologoma catchment, eastern Uganda

被引:25
作者
Bunyangha, Jackson [1 ]
Majaliwa, Mwanjalolo J. C. [2 ,3 ]
Muthumbi, Agnes. W. [3 ]
Gichuki, Nathan. N. [3 ,4 ]
Egeru, Anthony [4 ]
机构
[1] Makerere Univ, Dept Sci Tech & Vocat Educ, POB 7062, Kampala, Uganda
[2] Makerere Univ, Dept Geog Geoinformat & Climat Sci, POB 7062, Kampala, Uganda
[3] Univ Nairobi, Sch Biol Sci, POB 30197, Nairobi, Kenya
[4] Makerere Univ, Dept Environm Management, POB 7062, Kampala, Uganda
关键词
Land change modeler; Multi-layer perceptron; Remote sensing; TerrSet; Watershed monitoring; MARKOV-CHAIN; ALLOCATION DISAGREEMENT; CELLULAR-AUTOMATON; MODEL; ACCURACY; AREA; CLASSIFICATION; DEFORESTATION; BIODIVERSITY; INTEGRATION;
D O I
10.1016/j.ejrs.2021.02.003
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Land use/cover (LULC) change is a major concern in Africa's river basins and policy makers, environmentalists and other stakeholders tackling biodiversity and sustainable development issues in these watersheds require accurate information on past, present and future LULC projections to develop management strategies for the concerned watersheds. This study assessed the historical, current and future LULC changes in Mpologoma catchment. Remote sensing and supervised classification were used to analyze 33-year multitemporal LULC changes in Mpologoma catchment while future patterns for the next two decades were predicted using the Cellular Automata-Markov modelling technique in TerrSet's Land Change Modeler. Initially, in 1986, the catchment was dominated by grassland (32.08%). However, most grassland (92.77%) was gradually converted to subsistence farming (75%) and built-up (15.7%). Grassland, woodland and wetland annually declined at a rate of 5.52%, 2.47% and 0.63% respectively while farmland and built-up expanded at 9.32% and 6.22% respectively and by 2019 subsistence farming was the dominant class (53.16%). Prediction results showed that by 2039, woodland, grassland, wetland and open water will decrease while there will be major increases in built-up and commercial farming from 11.61% to 27.91% and 0.18% to 0.34% respectively. Subsistence farming will continue to be the dominant land use by 2039 attributed to gains from woodland (4.7%), grassland (3.7%) and wetland (4.9%). These LULC changes indicate an intensifying land use pressure in Mpologoma catchment and provide useful information for land use planners, environmentalists and policymakers in this catchment to consider when planning for sustainable management of the watershed.(c) 2021 National Authority for Remote Sensing and Space Sciences. Production and hosting by Elsevier B. V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/).
引用
收藏
页码:675 / 685
页数:11
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