国土资源遥感
國土資源遙感
국토자원요감
REMOTE SENSING FOR LAND & RESOURCES
2014年
4期
145-150
,共6页
生态%水土流失%遥感生态指数(RSEI)%常宁市
生態%水土流失%遙感生態指數(RSEI)%常寧市
생태%수토류실%요감생태지수(RSEI)%상저시
ecology%soil erosion%remote sensing ecology index ( RSEI)%Changning City
利用遥感技术进行区域生态变化评估,能够得到周期长、现时性强的结果。以常宁市为例,采用遥感生态指数方法来监测水土流失区的生态变化,选取1990年,2002年及2009年的Landsat TM 遥感图像,分别提取绿度、湿度、热度和干度4个生态因子作为评估指标,结合主成分分析方法,定量、客观地评估研究区域20 a间生态变化。结果表明,遥感生态指数方法能够很好地评价水土流失区生态修复的效果,其中,遥感生态指数值上升了22.39%,生态为优良等级所占的面积比例先从1990年的13.086%下降到2002年的4.006%,再上升到了2009年16.699%,说明常宁市经过20 a的水土流失治理,该区域的生态质量先急剧下降再有了较大的改善。通过对常宁市调查分析,以植树造林和施工预防为主的措施对生态质量的改善有较好的效果。
利用遙感技術進行區域生態變化評估,能夠得到週期長、現時性彊的結果。以常寧市為例,採用遙感生態指數方法來鑑測水土流失區的生態變化,選取1990年,2002年及2009年的Landsat TM 遙感圖像,分彆提取綠度、濕度、熱度和榦度4箇生態因子作為評估指標,結閤主成分分析方法,定量、客觀地評估研究區域20 a間生態變化。結果錶明,遙感生態指數方法能夠很好地評價水土流失區生態脩複的效果,其中,遙感生態指數值上升瞭22.39%,生態為優良等級所佔的麵積比例先從1990年的13.086%下降到2002年的4.006%,再上升到瞭2009年16.699%,說明常寧市經過20 a的水土流失治理,該區域的生態質量先急劇下降再有瞭較大的改善。通過對常寧市調查分析,以植樹造林和施工預防為主的措施對生態質量的改善有較好的效果。
이용요감기술진행구역생태변화평고,능구득도주기장、현시성강적결과。이상저시위례,채용요감생태지수방법래감측수토류실구적생태변화,선취1990년,2002년급2009년적Landsat TM 요감도상,분별제취록도、습도、열도화간도4개생태인자작위평고지표,결합주성분분석방법,정량、객관지평고연구구역20 a간생태변화。결과표명,요감생태지수방법능구흔호지평개수토류실구생태수복적효과,기중,요감생태지수치상승료22.39%,생태위우량등급소점적면적비례선종1990년적13.086%하강도2002년적4.006%,재상승도료2009년16.699%,설명상저시경과20 a적수토류실치리,해구역적생태질량선급극하강재유료교대적개선。통과대상저시조사분석,이식수조림화시공예방위주적조시대생태질량적개선유교호적효과。
Using remote sensing methods to assess regional ecological change can achieve a long cycle and immediate results. The authors employed remote sensing eco index ( RSEI) method to monitor the erosion of the ecological changes, with Changning City as the study area. 1990, 2002 and 2009 Landsat TM remote sensing images were chosen as data sources, from which 4 ecological factors were extracted, i. e. , green degree, humidity degree, heat degree and dry degree, as indicators of evaluation model. Combined with principal component analysis, the authors quantitatively and objectively assessed regional ecological changes in the past 20 years. The results show that remote sensing Eco Index ( RSEI) method seems to be a good method for evaluating the effect of ecological restoration in soil erosion area. It is proved that RSEI eco - index value increased by 22. 39%;nevertheless , excellent level of eco-area ratio decreased from 13 . 086% in 1990 to 4 . 006% in 2002 and then rose to 16 . 699% in 2009 , which indicates that the ecological quality of this region has been greatly improved after 20 years' soil erosion control. Through the investigation and analysis of Changning City, the authors have found that main prevention measures, such as afforestation and construction, have exerted greater effects on the improvement of the ecological quality.
