土地利用/土地覆盖探测对古马拉流域气候变率的影响

Q2 Social Sciences

International Journal of Water Pub Date : 2019-05-02 DOI:10.1504/IJW.2019.10020973

A. Halefom, Asirat Teshome, Ermias Sisay

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引用次数: 3

摘要

利用研究区域的卫星图像和天气数据对气候变化进行了土地利用/土地覆盖检测。LU/LC分析使用监督分类进行，使用的类别为建成区、森林、草原、农业和水体。从分析来看，1997年至2017年，建成区面积呈增加趋势。使用Mann-Kendall和Sen的斜率估计器进行的气候变化评估表明，年均最高气温和平均气温呈正趋势，年均最低气温呈下降趋势。年降雨量在Bega季节呈正趋势，在Belg季节和Kiremt季节呈下降趋势。年平均最低温度、最高温度和年平均温度的百分比变化分别为0.4%、2.4%和2.6%。Bega季节、Belg季节和Kiremt季节的年平均降雨量分别为−1.7%、3.5%、6.5%和−6.4%。因此，百分比变化表明LU/LC变化影响气候。

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Impacts of land use/land cover detection on climate variability of Gumara Watershed, Ethiopia

Land use/land cover (LU/LC) detection on climate variability has been conducted using satellite image and weather data in the study area. LU/LC analysis was done using supervised classification and the categories used were built-up area, forest, grassland, agriculture and waterbody. From the analysis, built-up area is shown as increasing from 1997 to 2017. Climate variability assessment done using the Mann-Kendall and Sen's slope estimator shows that average annual maximum temperature and mean temperature have positive trends, average annual minimum temperature shows a decreasing trend. Annual rainfall showed positive trend in the Bega season and decreasing trends in, Belg season and Kiremt season. Percentage changes were observed as 0.4%, 2.4% and 2.6% for average annual minimum, maximum and average annual temperature, respectively. Average annual rainfall, in Bega season, Belg season and Kiremt seasons was −1.7%, 3.5%, 6.5% and −6.4% respectively. Hence percentage changes show LU/LC change affects climate.

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来源期刊

International Journal of Water Social Sciences-Geography, Planning and Development

CiteScore

0.40

自引率

0.00%

发文量

期刊介绍： The IJW is a fully refereed journal, providing a high profile international outlet for analyses and discussions of all aspects of water, environment and society.