基于ENVI的大纵湖流域土地利用变化及其对水质影响研究
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摘要
为定量研究大纵湖流域土地利用类型与水质之间的关系,利用ENVI对大纵湖流域2012年和2016年Landsat TM遥感图像解译,采用监督分类法将土地分为6种类型,并与水质进行灰色关联。结果表明:①大纵湖流域以耕地和建设用地为主,两者比例超过总面积的70%。从2012-2016年,耕地和未利用地面积不断减少,主要流入林地和水域。②2012-2016年大纵湖水质指标总体均呈现先略有下降后缓慢改善的趋势。③湖泊水质整体上与土地利用类型的灰色关联度最大的是建设用地,其次是未利用地和水域,林地、耕地和草地的灰色关联度相对较低;各水质指标与土地利用的灰色关联度差异较大。研究表明,林地、草地对水质改善有着积极作用,因此在大纵湖流域上游多植树种草,有利于维护生态环境健康。
In order to quantitatively investigate the relationship between land-use change and water quality in the Dazong Lake basin,Landsat TM images from 2012 and 2016 were interpreted by using ENV. In this paper,the research area is divided into six types by using supervised classification and the grey correlation analysis method is used to evaluate water quality. The results show that: ① Dazong Lake basin is dominated by farmland and construction land accounting for more than 70% of the total area. From 2012 to 2016,the farmland and unused land had been converted to woodland and water area. ②Generally,from 2012 to 2016,the water quality of Dazong Lake was deteriorated and then improved. ③The order from large to small of the grey relational degree between water quality of lake and land-use is construction land,unused land,water area,woodland or farmland or grassland; the grey correlation between water quality indexes and land use is quite different; woodland and grassland play an active role in improving water quality. Therefore,planting more trees and grass in the upper Dazong lake basin is conductive to the maintenance of ecological health.
In order to quantitatively investigate the relationship between land-use change and water quality in the Dazong Lake basin,Landsat TM images from 2012 and 2016 were interpreted by using ENV. In this paper,the research area is divided into six types by using supervised classification and the grey correlation analysis method is used to evaluate water quality. The results show that: ① Dazong Lake basin is dominated by farmland and construction land accounting for more than 70% of the total area. From 2012 to 2016,the farmland and unused land had been converted to woodland and water area. ②Generally,from 2012 to 2016,the water quality of Dazong Lake was deteriorated and then improved. ③The order from large to small of the grey relational degree between water quality of lake and land-use is construction land,unused land,water area,woodland or farmland or grassland; the grey correlation between water quality indexes and land use is quite different; woodland and grassland play an active role in improving water quality. Therefore,planting more trees and grass in the upper Dazong lake basin is conductive to the maintenance of ecological health.
引文
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[26]吴晶晶,蔡永立.快速城市化地区土地利用变化及其对水质的影响———以上海市奉贤区为例[J].安徽农业科学,2011,39(26):16 208-16 211.
[27] Chen Xiang,Zhou Weiqi,Steward T.A Pickett,et al. Spatial-tempo-ral variations of water quality and its relationship to land use and landcover in Beijing,China[J]. International Journal of EnvironmentalResearch&Public Health,2016,13(5):449.
[2]李宗华,王志国,刘龙龙,等.不同土地利用/覆被类型情景下清漳河流域的水文响应[J].节水灌溉,2015,(6):47-49.
[3]张洪,陈震,张帅,等.云南省高原湖泊流域土地利用与水环境变化异质性研究[J].水土保持通报,2012,32(2):255-260.
[4] Jiao Ding,Yuan Jiang,Qi Liu,et al. Influences of the land use patternon water quality in low-order streams of the Dongjiang River basin,China:a multi-scale analysis[J]. Science of the Total Environment,2016,551-552:205-216.
[5]周文,刘茂松,徐驰,等.太湖流域河流水质状况对景观背景的响应[J].生态学报,2012,32(16):5 043-5 053.
[6]赵军,单福征,许云峰,等.河网城市不透水面的河流生态系统响应:方法论框架[J].自然资源学报,2012,27(3):382-393.
[7]姜畅,刘鸿雁,陈竹,等.基于GIS的红枫湖流域土地利用变化与水质响应[J].农业环境科学学报,2018,37(6):1 232-1 239.
[8]李博炎,张饮江,彭群洲,等.土地利用/覆被变化对太湖贡湖湾水质影响的研究[J].上海海洋大学学报,2017,26(2):243-250.
[9]殷飞,金世佳.基于改良综合水质标识指数法的松花江流域(吉林省)水质评价[J].节水灌溉,2017,(5):67-71.
[10]廖建荣.山地城市土地利用与河流水质响应关系的研究———以重庆市龙景湖流域为例[D].重庆:重庆大学,2016.
[11]曹灿,张飞,阿依尼格尔·亚力坤,等.艾比湖区域景观格局与河流水质关系探讨[J].环境科学,2018,39(4):1 569-1 577.
[12]姜庆虎,刘艳芳,黄浦江,等.城市湖泊流域面源污染的源-汇效应研究———以武汉市东湖为例[J].生态环境学报,2013,22(3):469-474.
[13]王渊.典型集约化农区地下潜水非点源污染特征及其与土地利用关系[D].杭州:浙江大学,2018.
[14]蔡宏,林国敏,康文华.赤水河流域中上游坡地景观特征对河流水质的影响[J].地理研究,2018,37(4):704-716.
[15]胡和兵.城市化背景下流域土地利用变化及其对河流水质影响研究[D].南京:南京师范大学,2013.
[16]杜芳芳.湖泊流域土地利用变化与湖泊水质关系研究[D].昆明:昆明理工大学,2011.(下转第106页)
[17]刘纪远,匡文慧,张增祥,等.20世纪80年代末以来中国土地利用变化的基本特征与空间格局[J].地理学报,2014,69(1):3-14.
[18] Fagbote E O,Olanipekun E O,Uyi H S. Water quality index of theground water of bitumen deposit impacted farm settlements using en-tropy weighted method[J]. International Journal of EnvironmentalScience&Technology,2014,11(1):127-138.
[19] Wei G.Grey relational analysis model for dynamic hybrid multiple at-tribute decision making[J]. Knowledge-Based Systems,2011,24(5):672-679.
[20] Liu Jiyuan,Zhang Zengxiang,Xu Xinliang,et al. Spatial patternsand driving forces of land use change in China during the early 21stcentury[J]. Journal of Geographical Sciences,2010,20(4):483-494.
[21]雷亚龙,陈菁,孙伯明.张家港土地利用变化预测及生态响应[J].中国农村水利水电,2016,(5):33-36.
[22]杨娅楠,王金亮,陈光杰,等.抚仙湖流域土地利用格局与水质变化关系[J].国土资源遥感,2016,28(1):159-165.
[23]潘延安,雷沛,张洪,等.重庆园博园龙景湖新建初期内源氮磷分布特征及扩散通量估算[J].环境科学,2014,35(5):1 727-1 734.
[24]马小雪,王腊春.里下河地区主要水环境污染物的空间分布特性研究[J].水资源与水工程学报,2014,25(6):1-6.
[25]刘光清,刘芳.里下河“引江冲淤”对区域水环境影响评价[J].人民长江,2007,38(8):46-47.
[26]吴晶晶,蔡永立.快速城市化地区土地利用变化及其对水质的影响———以上海市奉贤区为例[J].安徽农业科学,2011,39(26):16 208-16 211.
[27] Chen Xiang,Zhou Weiqi,Steward T.A Pickett,et al. Spatial-tempo-ral variations of water quality and its relationship to land use and landcover in Beijing,China[J]. International Journal of EnvironmentalResearch&Public Health,2016,13(5):449.
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