Analysis of land-cover changes in the Transboundary Sio-Malaba-Malakisi River Basin of East Africa: Towards identifying potential land-use transition regimes

被引:9
作者
Chasia, Stanley [1 ,2 ]
Herrnegger, Mathew [3 ]
Juma, Benard [1 ,2 ,4 ]
Kimuyu, Jacinta [5 ]
Sitoki, Lewis [1 ]
Olang, Luke [4 ,6 ]
机构
[1] Tech Univ Kenya, Dept Geosci & Environm, Nairobi, Kenya
[2] Tech Univ Kenya, Dept Civil Engn, Nairobi, Kenya
[3] Univ Nat Resources & Life Sci, Inst Hydrol & Water Management, Dept Water Atmosphere & Environm, Vienna, Austria
[4] Tech Univ Kenya, Fac Appl Sci & Technol, Ctr Integrated Water Resource Management, Nairobi, Kenya
[5] Tech Univ Kenya, Dept Geog & Spatial Sci, Nairobi, Kenya
[6] Tech Univ Kenya, Dept Biosyst & Environm Engn, Nairobi, Kenya
关键词
Land-use land-cover change; Landsat imageries; catchment management; transboundary river basin; sio-malaba-malakisi; East Africa; IMAGE CLASSIFICATION; IMPACTS; KENYA; RUNOFF; REGION; AREA;
D O I
10.1080/19376812.2021.2007143
中图分类号
P9 [自然地理学]; K9 [地理];
学科分类号
0705 ; 070501 ;
摘要
This study evaluated historical land-cover states in order to identify potential land-use transition regimes leading to land degradation. Landsat satellite datasets were used to characterize land-cover states for 1986-2017 period. The multinomial probability distribution was used to establish sample size for training and accuracy assessment. Using a hybrid image classification approach, individual satellite images were initially clustered using the ISODATA technique, and spectral classes later transformed posteriori into respective thematic classes. Maximum Likelihood Function was subsequently used to assign pixels into classes with highest probability. Approximately 12% of mixed forest declined, while cropland increased by 30% between 1995-2008.
引用
收藏
页码:170 / 186
页数:17
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