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Land Change and Desertification in the South Asembo Region

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Presentation on theme: "Land Change and Desertification in the South Asembo Region"— Presentation transcript:

1 Land Change and Desertification in the South Asembo Region
Miranda Riemer FR3262 Project

2 South Asembo Region along Lake Victoria shore near highlands of Kenya
extremely impoverished, AIDS, Malaria polluted and extremely limited water resources subsistence farming and deforestation to clear new land

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4 Lake Victoria Facing drainage and desertification
Declined 6 feet in the last ten years Increasing population in the area Feeds Nile river Extremely important ecologically

5 This Project Compare land cover and shoreline over a twenty or so year period Remote sensing allows us to do this remotely and accurately Important to understand the effects of population, climate alterations, etc. on large land areas and important water bodies in Africa

6 Images Obtained images from Glovis online image search tool
One from 1984, and one from 2008 Chose images with extremely low (<10%) cloud cover, had to avoid ones with disturbances or other issues

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8 Methods Images rectified (or so I thought) Unsupervised classification
20 classes Convergence threshold of 0.950 50 max. iterations means along principal axis Identified classes Thematic Recode Picked colors Tried to do a change analysis

9 Results

10 Results

11 Results Lake Victoria shoreline did decline
Natural vegetation and forest areas actually increased over the 24 years couldn't do a change analysis to get quantitative results of the data

12 Discussion Images were from two different months- could be why the forested areas were different Issues with project partner had to be overcome Learned (and relearned) a lot about ERDAS Imagine - yay!


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