CAJ | 학술논문

基于1998—2012年长时序SPOT 4－VGT归一化植被指数数据，在数据预处理的基础上，运用标准差和趋势分析法对珠江流域植被覆盖时空分布特征、波动特征和变化趋势进行了分析。结果表明：（1）1998—2012年，珠江流域月最大NDVI季节变化较明显，峰值出现在9月、极小值出现在2月，月均值为0.578，年最大NDVI均值整体呈上升趋势；在空间上，流域年最大NDVI均值为0.740，植被覆盖整体状况良好，但存在明显的空间分布差异。（2）1998—2012年，珠江流域NDVI的标准差存在明显的空间差异，年际波动较大的3个区域分别为珠江源喀斯特地区、流域中部广西盆地内的喀斯特地区和珠江三角洲地区。（3）近15年来，珠江流域年最大NDVI整体呈增长趋势，局部地区恶化。改善区域合计占总面积的57.29％，退化区域占总面积的9.20％，基本不变区域占总面积的33.51％。
기우1998—2012년장시서SPOT 4－VGT귀일화식피지수수거，재수거예처리적기출상，운용표준차화추세분석법대주강류역식피복개시공분포특정、파동특정화변화추세진행료분석。결과표명：（1）1998—2012년，주강류역월최대NDVI계절변화교명현，봉치출현재9월、겁소치출현재2월，월균치위0.578，년최대NDVI균치정체정상승추세；재공간상，류역년최대NDVI균치위0.740，식피복개정체상황량호，단존재명현적공간분포차이。（2）1998—2012년，주강류역NDVI적표준차존재명현적공간차이，년제파동교대적3개구역분별위주강원객사특지구、류역중부엄서분지내적객사특지구화주강삼각주지구。（3）근15년래，주강류역년최대NDVI정체정증장추세，국부지구악화。개선구역합계점총면적적57.29％，퇴화구역점총면적적9.20％，기본불변구역점총면적적33.51％。
The characteristics of spatial-temporal distribution,fluctuation and trends of vegetation cover change a-long Pearl River Basin during 1998-2012 are analyzed based on sequential SPOT 4-VGT data.Standard deviation and linear regression techniques are used after the data are preprocessed.Results show:(1)From 1998 to 2012, the seasonal maximum NDVI change along Pearl River Basin is obvious.The peak appears in September and mini-mum in February,the average is 0.578,the mean maximum NDVI is on the rise during recent 15 years.The aver-age of maximum NDVI is 0.740.The vegetation cover condition is good,but there is an obvious spatial differ-ences.(2)The standard deviation of NDVI exists obvious space difference in Pearl River Basin.The three areas of bigger inter-annual fluctuations are the karst plateau of Pearl River source,the central basin of Guangxi Zhuang Autonomous karst region and the Pearl River delta region respectively.(3)In recent 15 years,the mean maximum NDVI trend shows that vegetation is overall improved,deterioration of parts.Improved area,degradation area and constant area account for 57.29%,9.20%and 33.5 1%of the total area respectively.