基于MODIS-EVI的重庆植被覆盖时空分异特征研究
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摘要
利用MODIS-EVI数据,采用像元二分模型结合距平百分率、变异系数和分布指数对2000—2015年重庆植被覆盖度变化时空分异特征进行了分析,结果表明:(1)重庆植被年际、夏、秋季和2008—2015年春季以中覆盖度为主,冬季以及2000—2007年春季以低覆盖度为主。(2)植被覆盖年际变化不明显;劣覆盖度在2000、2002、2003年春季,2001、2006年秋季以及2011年冬季异常偏多;低覆盖度在2000、2001年秋季异常偏多;高覆盖度在2000、2008年秋季和2014年春季异常偏少。(3)植被的波动变化除了冬季以中度为主外,年际、春、夏、秋季均以轻度为主;稳定比例最高为夏季,轻度比例最高为秋季,中度和重度比例最高为冬季。(4)稳定和轻度波动类型主要分布在山地森林和草地区,中度和重度波动类型主要是城镇、水域及其周边区域。在400m以下,植被变化为重度波动;在400—800m,植被年际和夏季趋于稳定分布,而春、秋、冬季为轻度波动;在800—1300m,植被年际和夏季为中度波动,春、秋、冬季为稳定分布;在1300m以上,植被年际和夏季呈现轻度波动,春季为中度波动,秋、冬季为稳定分布。
The spatial-temporal variability of vegetation coverage in Chongqing was studied based on the MODIS-EVI datasets using the method of dimidiate pixel modeling and anomaly percentage and variance coefficient and distribution indexes from 2000—2015. The results showed that:( 1) the vegetation coverage was dominated by medium coverage annually and in summer and autumn. In spring,the vegetation coverage was dominated by low coverage from 2000—2007,while it was dominated by medium coverage from 2008—2015.( 3) The annual coverage did not changed significantly.Little coverage was much more than normal in the springs of 2000,2002,and 2003,and in the autumns of 2001 and 2006,and in the winter of 2011. Low coverage was much greater than normal in the autumns of 2000 and 2001. High coverage was much less than normal in the autumns of 2000 and 2008 and in the spring of 2014.(3) Priority was given to the fluctuation of vegetation coverage with low fluctuation annually and in spring,summer,and autumn,while priority was given to moderate fluctuation in winter. The highest percentage stability was recorded during summer and low fluctuation was inautumn,while the moderate and serious fluctuations were in winter.( 4) The stable and low fluctuations were mainly distributed in the forest and grass on mountains,while the moderate and serious fluctuations were mainly distributed in the town,water,and the surrounding region. With the increase in elevation,the serious fluctuation was mainly distributed below 400 m. The vegetation was stable annually and during summer,while in spring,autumn,and winter there was low fluctuation for vegetation between 400—800 m. The annual and summer vegetation showed moderate fluctuation,while in spring,autumn,and winter it was stable between 800—1300 m. Annual and summer vegetation showed low fluctuation,while in spring there was moderate fluctuation,but was stable in autumn and winter above 1300 m.
The spatial-temporal variability of vegetation coverage in Chongqing was studied based on the MODIS-EVI datasets using the method of dimidiate pixel modeling and anomaly percentage and variance coefficient and distribution indexes from 2000—2015. The results showed that:( 1) the vegetation coverage was dominated by medium coverage annually and in summer and autumn. In spring,the vegetation coverage was dominated by low coverage from 2000—2007,while it was dominated by medium coverage from 2008—2015.( 3) The annual coverage did not changed significantly.Little coverage was much more than normal in the springs of 2000,2002,and 2003,and in the autumns of 2001 and 2006,and in the winter of 2011. Low coverage was much greater than normal in the autumns of 2000 and 2001. High coverage was much less than normal in the autumns of 2000 and 2008 and in the spring of 2014.(3) Priority was given to the fluctuation of vegetation coverage with low fluctuation annually and in spring,summer,and autumn,while priority was given to moderate fluctuation in winter. The highest percentage stability was recorded during summer and low fluctuation was inautumn,while the moderate and serious fluctuations were in winter.( 4) The stable and low fluctuations were mainly distributed in the forest and grass on mountains,while the moderate and serious fluctuations were mainly distributed in the town,water,and the surrounding region. With the increase in elevation,the serious fluctuation was mainly distributed below 400 m. The vegetation was stable annually and during summer,while in spring,autumn,and winter there was low fluctuation for vegetation between 400—800 m. The annual and summer vegetation showed moderate fluctuation,while in spring,autumn,and winter it was stable between 800—1300 m. Annual and summer vegetation showed low fluctuation,while in spring there was moderate fluctuation,but was stable in autumn and winter above 1300 m.
引文
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[15]李红军,郑力,雷玉平,李春强,周戡.基于EOS/MODIS数据的NDVI与EVI比较研究.地理科学进展,2007,26(1):26-32.
[16]左丽君,张增祥,董婷婷,汪潇. MODIS/NDVI和MODIS/EVI在耕地信息提取中的应用及对比分析.农业工程学报,2008,24(3):167-172.
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[18]童晓伟,王克林,岳跃民,廖楚杰,徐艳芳,朱海涛.桂西北喀斯特区域植被变化趋势及其对气候和地形的响应.生态学报,2014,34(12):3425-3434.
[19]Levin N. Human factors explain the majority of MODIS-derived trends in vegetation cover in Israel:a densely populated country in the eastern Mediterranean. Regional Environmental Change,2016,16(4):1197-1211.
[20]陈利顶,杨爽,冯晓明.土地利用变化的地形梯度特征与空间扩展——以北京市海淀区和延庆县为例.地理研究,2008,27(6):1225-1233.
[21]马士彬,张勇荣,安裕伦.山区城市土地利用动态空间分布特征——以贵州省六盘水市为例.自然资源学报,2012,27(3):489-496.
[22]李苗苗,吴炳方,颜长珍,周为峰.密云水库上游植被覆盖度的遥感估算.资源科学,2004,26(4):153-159.
[23]赵丽苹.基于MODIS数据的喀斯特地区石漠化时空演变特征研究[D].北京:中国地质大学(北京),2015.
[24]张竟竟,郭志富,李治国.河南水旱灾害危险性时空特征研究.自然资源学报,2013,28(6):957-968.
[25]韦开,王全九,周蓓蓓,何斌.基于降水距平百分率的陕西省干旱时空分布特征.水土保持学报,2017,31(1):318-322.
[26]闫峰,吴波,王艳姣. 2000—2011年毛乌素沙地植被生长状况时空变化特征.地理科学,2013,33(5):602-608.
[27]潘竟虎,黄克军,李真. 2001-2010年疏勒河流域植被净初级生产力时空变化及其与气候因子的关系.生态学报,2017,37(6):1888-1899.
[28]Wang Y F,Shen Y J,Chen Y N,Guo Y. Vegetation dynamics and their response to hydroclimatic factors in the Tarim River Basin,China.Ecohydrology,2013,6(6):927-936.
[29]喻红,曾辉,江子瀛.快速城市化地区景观组分在地形梯度上的分布特征研究.地理科学,2001,21(1):64-69.
[2]高江波,吴绍洪,蔡运龙.区域植被覆盖的多尺度空间变异性——以贵州喀斯特高原为例.地理研究,2013,32(12):2179-2188.
[3]陈效逑,王恒. 1982-2003年内蒙古植被带和植被覆盖度的时空变化.地理学报,2009,64(1):84-94.
[4]马娜,胡云锋,庄大方,张学利.基于遥感和像元二分模型的内蒙古正蓝旗植被覆盖度格局和动态变化.地理科学,2012,32(2):251-256.
[5]符静,秦建新,张猛,龙岳红. 2001-2013年洞庭湖流域植被覆盖度时空变化特征.地球信息科学学报,2016,18(9):1209-1216.
[6]王世杰.喀斯特石漠化概念演绎及其科学内涵的探讨.中国岩溶,2002,21(2):101-105.
[7]刘灿,高阳华,李月臣,杨世琦,倪波顺.基于NDVI的重庆市植被覆盖变化及其对气候因子的响应.长江流域资源与环境,2013,22(11):1514-1520.
[8]李建国,濮励杰,刘金萍,李月臣,刘丽丽. 2001年至2010年三峡库区重庆段植被活动时空特征及其影响因素.资源科学,2012,34(8):1500-1507.
[9]Dutta D,Das P K,Paul S,Sharma J R,Dadhwal V K. Assessment of ecological disturbance in the mangrove forest of Sundarbans caused by cyclones using MODIS time-series data(2001-2011). Natural Hazards,2015,79(2):775-790.
[10]陈燕丽,罗永明,莫伟华,莫建飞,黄永磷,丁美花. MODIS NDVI与MODIS EVI对气候因子响应差异.自然资源学报,2014,29(10):1802-1812.
[11]Otto M,H9pfner C,Curio J,Maussion F,Scherer D. Assessing vegetation response to precipitation in northwest Morocco during the last decade:an application of MODIS NDVI and high resolution reanalysis data. Theoretical and Applied Climatology,2016,123(1/2):23-41.
[12]Qiu B W,Zeng C Y,Tang Z H,Chen C C. Characterizing spatiotemporal non-stationarity in vegetation dynamics in China using MODIS EVI dataset. Environmental Monitoring and Assessment,2013,185(11):9019-9035.
[13]李文梅,覃志豪,李文娟,杨强. MODIS NDVI与MODIS EVI的比较分析.遥感信息,2010,(6):73-78.
[14]王正兴,刘闯,Huete A.植被指数研究进展:从AVHRR-NDVI到MODIS-EVI.生态学报,2003,23(5):979-987.
[15]李红军,郑力,雷玉平,李春强,周戡.基于EOS/MODIS数据的NDVI与EVI比较研究.地理科学进展,2007,26(1):26-32.
[16]左丽君,张增祥,董婷婷,汪潇. MODIS/NDVI和MODIS/EVI在耕地信息提取中的应用及对比分析.农业工程学报,2008,24(3):167-172.
[17]穆少杰,李建龙,陈奕兆,刚成诚,周伟,居为民. 2001-2010年内蒙古植被覆盖度时空变化特征.地理学报,2012,67(9):1255-1268.
[18]童晓伟,王克林,岳跃民,廖楚杰,徐艳芳,朱海涛.桂西北喀斯特区域植被变化趋势及其对气候和地形的响应.生态学报,2014,34(12):3425-3434.
[19]Levin N. Human factors explain the majority of MODIS-derived trends in vegetation cover in Israel:a densely populated country in the eastern Mediterranean. Regional Environmental Change,2016,16(4):1197-1211.
[20]陈利顶,杨爽,冯晓明.土地利用变化的地形梯度特征与空间扩展——以北京市海淀区和延庆县为例.地理研究,2008,27(6):1225-1233.
[21]马士彬,张勇荣,安裕伦.山区城市土地利用动态空间分布特征——以贵州省六盘水市为例.自然资源学报,2012,27(3):489-496.
[22]李苗苗,吴炳方,颜长珍,周为峰.密云水库上游植被覆盖度的遥感估算.资源科学,2004,26(4):153-159.
[23]赵丽苹.基于MODIS数据的喀斯特地区石漠化时空演变特征研究[D].北京:中国地质大学(北京),2015.
[24]张竟竟,郭志富,李治国.河南水旱灾害危险性时空特征研究.自然资源学报,2013,28(6):957-968.
[25]韦开,王全九,周蓓蓓,何斌.基于降水距平百分率的陕西省干旱时空分布特征.水土保持学报,2017,31(1):318-322.
[26]闫峰,吴波,王艳姣. 2000—2011年毛乌素沙地植被生长状况时空变化特征.地理科学,2013,33(5):602-608.
[27]潘竟虎,黄克军,李真. 2001-2010年疏勒河流域植被净初级生产力时空变化及其与气候因子的关系.生态学报,2017,37(6):1888-1899.
[28]Wang Y F,Shen Y J,Chen Y N,Guo Y. Vegetation dynamics and their response to hydroclimatic factors in the Tarim River Basin,China.Ecohydrology,2013,6(6):927-936.
[29]喻红,曾辉,江子瀛.快速城市化地区景观组分在地形梯度上的分布特征研究.地理科学,2001,21(1):64-69.