近十年鄱阳湖枯季湿地信息提取及变化监测分析
|
摘要
基于环境卫星影像利用支持向量机法提取鄱阳湖近十年枯季湿地信息,并结合各湿地类型的时空变化分析其影响因素,得出结论:①支持向量机法总体分类精度为97.52%,相比于最大似然法、决策树法在鄱阳湖湿地信息提取中有更好的提取效果;②十年间水域面积平均为1209.45 km~2,天然水域主要分布于湖区东部和北部,圩堤湖水域面积几乎不变;枯季以草洲为主,广泛分布于南矶乡地区和入湖河道两侧洲滩;裸滩变化幅度较大,总体与水域呈负相关性;沙地面积最少,最大面积不足50 km~2,大部分分布于松门山岛;③气候、地形地势及城镇建设、人工水利、围垦、采砂、捕捞、排污等人类干预活动均在不同程度上影响鄱阳湖湿地类型的演变.
Based on environmental satellite imagery, information of Poyang Lake wetland in the past ten years was extracted by using the support vector machine(SVM) method. Then the information was analyzed while factors affected the spatial and temporal changes of each type of wetland were taken into consideration. After th at, a conclusion was made as follows : ① The SVM method had an overall accuracy rate of 97.52 %, better in extracting Poyang Lake wetland information than the maximum likelihood method and the decision tree method;②The average water area in the past decade was 1209.45 km~2. Natural waters were mainly distributed in the eastern and the northern parts of the lake, and the water area of the Dyke Lake was almost unchanged. Wet meadows were widely scattered in Nanji Town and the beaches on both sides of river channels leading to Poyang Lake, taking up the largest area among other types of wetland during low flow period. The beach without any plant changed a lot and had an overall negative correlation with waters area. The sand land was the smallest, covering less than 50 km~2. Most of the sand land was distributed in Songmenshan Island. ③Climate, topography and human intervention activities such as urban construction, the construction of artificial water conservancy, reclamation, sand mining, fishing, and sewage discharge all affect the evolution of wetland types in Poyang Lake at varying degree levels.
Based on environmental satellite imagery, information of Poyang Lake wetland in the past ten years was extracted by using the support vector machine(SVM) method. Then the information was analyzed while factors affected the spatial and temporal changes of each type of wetland were taken into consideration. After th at, a conclusion was made as follows : ① The SVM method had an overall accuracy rate of 97.52 %, better in extracting Poyang Lake wetland information than the maximum likelihood method and the decision tree method;②The average water area in the past decade was 1209.45 km~2. Natural waters were mainly distributed in the eastern and the northern parts of the lake, and the water area of the Dyke Lake was almost unchanged. Wet meadows were widely scattered in Nanji Town and the beaches on both sides of river channels leading to Poyang Lake, taking up the largest area among other types of wetland during low flow period. The beach without any plant changed a lot and had an overall negative correlation with waters area. The sand land was the smallest, covering less than 50 km~2. Most of the sand land was distributed in Songmenshan Island. ③Climate, topography and human intervention activities such as urban construction, the construction of artificial water conservancy, reclamation, sand mining, fishing, and sewage discharge all affect the evolution of wetland types in Poyang Lake at varying degree levels.
引文
[1]谭志强,许秀丽,李云良,等.长江中游大型通江湖泊湿地景观格局演变特征[J].长江流域资源与环境,2017,26(10):1619-1629.
[2]肖复明,张学玲,蔡海生.鄱阳湖湿地景观格局时空演变分析[J].人民长江,2010,41(19):56-59,87.
[3]陈彬,于秀波,刘宇.基于中低分辨率遥感影像的分类方法对比研究———以鄱阳湖水鸟栖息地遥感分类为例[J].长江流域资源与环境,2015,24(11):1834-1842.
[4]余建杰.基于TM遥感影像的鄱阳湖湿地分类研究[D].南昌:南昌大学,2005.
[5]董金芳,王娟,何慧娟,等.基于支持向量机的湿地遥感分类方法[J].测绘与空间地理信息,2016,39(11):150-151,155.
[6]张策,臧淑英,金竺,等.基于支持向量机的扎龙湿地遥感分类研究[J].湿地科学,2011,9(3):263-269.
[7]刘吉平,赵丹丹. 1954-2010年三江平原土地利用景观格局动态变化及驱动力[J].生态学报,2014,34(12):3234-3244.
[8]余莉,何隆华,张奇,等.基于Landsat-TM影像的鄱阳湖典型湿地动态变化研究[J].遥感信息,2010(6):48-54.
[9] Tang X G, Li HP, Xu X B, et al. Changing land use and its impact on the habitat suitability for wintering Anseriformes in China′s Poyang Lake region[J]. Science of the Total Environment, 2016,557/558:296-306.
[10] Han X, Chen X, Feng L. Four decades of winter wetland changes in Poyang Lake based on Landsat observations between 1973 and2013[J]. Remote Sensing of Environment, 2015, 156:426-437.
[11] Chan K K Y, Xu B. Perspective on remote sensing change detection of Poyang Lake wetland[J]. Geographic Information Sciences, 2013,19(4):231-243.
[12]方朝阳,邬浩,陶长华,等.鄱阳湖南矶湿地景观信息高分辨率遥感提取[J].地球信息科学学报,2016,18(6):847-856.
[13]李琳.鄱阳湖区湿地特征提取研究[D].赣州:江西理工大学,2014.
[14]李鹏,封志明,姜鲁光,等.鄱阳湖天然湖面遥感监测及其与水位关系研究[J].自然资源学报,2013,28(9):1556-1568.
[15]许继军,陈进.三峡水库运行对鄱阳湖影响及对策研究[J].水利学报,2013,44(7):757-763.
[16]方春明,曹文洪,毛继新,等.鄱阳湖与长江关系及三峡蓄水的影响[J].水利学报,2012,43(2):175-181.
[17]甘小艳.干旱对鄱阳湖湿地影响研究[D].南昌:南昌大学,2011.
[18]王鹏,赖格英,黄小兰.鄱阳湖水利枢纽工程对湖泊水位变化影响的模拟[J].湖泊科学,2014,26(1):29-36.
[19]吴勰,王振兴,周航宇.鄱阳湖湿地生态演变驱动力及数字湿地调控体系[J].中南大学学报(自然科学版),2013,44(12):5173-5179.
[2]肖复明,张学玲,蔡海生.鄱阳湖湿地景观格局时空演变分析[J].人民长江,2010,41(19):56-59,87.
[3]陈彬,于秀波,刘宇.基于中低分辨率遥感影像的分类方法对比研究———以鄱阳湖水鸟栖息地遥感分类为例[J].长江流域资源与环境,2015,24(11):1834-1842.
[4]余建杰.基于TM遥感影像的鄱阳湖湿地分类研究[D].南昌:南昌大学,2005.
[5]董金芳,王娟,何慧娟,等.基于支持向量机的湿地遥感分类方法[J].测绘与空间地理信息,2016,39(11):150-151,155.
[6]张策,臧淑英,金竺,等.基于支持向量机的扎龙湿地遥感分类研究[J].湿地科学,2011,9(3):263-269.
[7]刘吉平,赵丹丹. 1954-2010年三江平原土地利用景观格局动态变化及驱动力[J].生态学报,2014,34(12):3234-3244.
[8]余莉,何隆华,张奇,等.基于Landsat-TM影像的鄱阳湖典型湿地动态变化研究[J].遥感信息,2010(6):48-54.
[9] Tang X G, Li HP, Xu X B, et al. Changing land use and its impact on the habitat suitability for wintering Anseriformes in China′s Poyang Lake region[J]. Science of the Total Environment, 2016,557/558:296-306.
[10] Han X, Chen X, Feng L. Four decades of winter wetland changes in Poyang Lake based on Landsat observations between 1973 and2013[J]. Remote Sensing of Environment, 2015, 156:426-437.
[11] Chan K K Y, Xu B. Perspective on remote sensing change detection of Poyang Lake wetland[J]. Geographic Information Sciences, 2013,19(4):231-243.
[12]方朝阳,邬浩,陶长华,等.鄱阳湖南矶湿地景观信息高分辨率遥感提取[J].地球信息科学学报,2016,18(6):847-856.
[13]李琳.鄱阳湖区湿地特征提取研究[D].赣州:江西理工大学,2014.
[14]李鹏,封志明,姜鲁光,等.鄱阳湖天然湖面遥感监测及其与水位关系研究[J].自然资源学报,2013,28(9):1556-1568.
[15]许继军,陈进.三峡水库运行对鄱阳湖影响及对策研究[J].水利学报,2013,44(7):757-763.
[16]方春明,曹文洪,毛继新,等.鄱阳湖与长江关系及三峡蓄水的影响[J].水利学报,2012,43(2):175-181.
[17]甘小艳.干旱对鄱阳湖湿地影响研究[D].南昌:南昌大学,2011.
[18]王鹏,赖格英,黄小兰.鄱阳湖水利枢纽工程对湖泊水位变化影响的模拟[J].湖泊科学,2014,26(1):29-36.
[19]吴勰,王振兴,周航宇.鄱阳湖湿地生态演变驱动力及数字湿地调控体系[J].中南大学学报(自然科学版),2013,44(12):5173-5179.