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首页> 外文期刊>International Journal of Geosciences >Retrospective Analysis of Land Cover and Use Dynamics in Gilgel Abbay Watershed by Using GIS and Remote Sensing Techniques, Northwestern Ethiopia
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Retrospective Analysis of Land Cover and Use Dynamics in Gilgel Abbay Watershed by Using GIS and Remote Sensing Techniques, Northwestern Ethiopia

机译：地理信息系统和遥感技术在埃塞俄比亚西北部吉尔吉尔阿贝流域土地覆盖和利用动态的回顾性分析

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摘要

This study was aimed at examining land cover changes for the last 35 years and its causative factors in Gilgel Abbay watershed by using GIS and remote sensing, survey and population data. The land use and cover changes study will help to apply the appropriate land use. The land cover/use status for the years 1973, 1986, 1995 and 2008 were examined using land sat images. The changes in different land cover units such as forest, wood and bush lands, grass, wetlands and water bodies, and farm and settlements were analyzed. Population change, tenure, poverty and lack of market and credit facilities in the watershed area were analyzed as causes of land cover changes. The results of the study have shown that during the last 35 years forest, grass lands, wetlands and lake areas were converted to farm and settlement areas. There was rapid increase of population with growth rates of 4.9% and 3.5% (1984-1994 and 1994-2007), respectively per annum which caused more land cover changes.
机译：这项研究的目的是通过使用GIS和遥感，调查和人口数据，研究过去35年中吉尔吉尔阿贝流域的土地覆被变化及其成因。土地用途和覆盖变化研究将有助于应用适当的土地用途。使用陆地卫星图像检查了1973年，1986年，1995年和2008年的土地覆盖/使用状况。分析了森林，木材和灌木丛土地，草，湿地和水体以及农场和住区等不同土地覆盖单位的变化。分析了流域地区的人口变化，权属，贫困以及缺乏市场和信贷设施，将其作为土地覆被变化的原因。研究结果表明，在过去的35年中，森林，草地，湿地和湖泊地区已转变为农场和定居区。人口迅速增长，分别以每年4.9％和3.5％的速度增长（1984-1994年和1994-2007年），这导致了更多的土地覆盖变化。

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