| 白洋淀近20年土地利用变化及其对水质的影响 |
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| 引用本文： | 刘丰,刘静玲,张婷,陈秋颖.白洋淀近20年土地利用变化及其对水质的影响[J].农业环境保护,2010(10):1868-1875. |
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| 作者姓名： | 刘丰 刘静玲 张婷 陈秋颖 |
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| 作者单位： | 水环境模拟国家重点实验室 北京师范大学环境学院,北京100875 |
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| 基金项目： | 国家重点基础研究发展计划（973）项目（2006CB403403）; 国家自然科学基金委员会主任基金（40940012）; 国家水体污染控制与治理科技重大专项（2008ZX07209-009） |
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| 摘 要： | 土地利用变化对明晰和诊断人类活动对湖泊水环境的影响具有重要意义。本文以白洋淀为研究对象,综合运用遥感影像解译、马尔柯夫转移矩阵和相关性分析的方法,揭示了白洋淀1987—2007年的土地利用变化规律,探讨了土地利用变化对白洋淀水质的影响。结果表明：白洋淀土地利用类型以苇地、耕地和水域为主,占总面积比例分别为45.66%~52.62%,17.92%~29.82%和11.31%~18.52%;1987~1999年间耕地向苇地和水域转变,转移概率分别为12.84%和7.2%;1999—2007年间水域转化为耕地和林地,转移概率分别为12.76%和6.37%,苇地转化为耕地和建筑用地,转移概率分别为3.03%和2.31%;1987—2007年间干草地和水域的面积分别减少24.06 km2和19.92 km2,耕地、建筑用地和苇地的面积分别增加20.98 km2、9.94 km2和9.67 km2,变化趋势主要是由干草地和水域向耕地、建筑用地和苇地的转变;除干草地与BOD5的相关系数为-0.711,P=0.048外,其他各土地利用类型与水质指标的相关性均不显著。该研究为在流域尺度下揭示土地利用空间格局变化对白洋淀水环境的影响奠定基础,并为制定该流域水环境管理措施提供科学依据。
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| 关 键 词： | 白洋淀 土地利用变化 马尔科夫转移矩阵 水质 |
Land Use Change and Its Effects on Water Quality in Baiyangdian Lake of North China During Last 20 Years |
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| LIU Feng,LIU Jing-ling,ZHANG Ting,CHEN Qiu-ying.Land Use Change and Its Effects on Water Quality in Baiyangdian Lake of North China During Last 20 Years[J].Agro-Environmental Protection,2010(10):1868-1875. |
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| Authors: | LIU Feng LIU Jing-ling ZHANG Ting CHEN Qiu-ying |
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| Institution: | (State Key Laboratory of Water Environment Simulation,School of Environment,Beijing Normal University,Beijing 100875) |
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| Abstract: | Land use change is one of major human impact on the environment and important in clarifying the cause-effect of environmental issues.In this study,Baiyangdian Lake was divided into 7 land use types by applying the images interpretation of land sat TM satellite in 1987,1999 and 2007.Land use change and its effects on water quality were studied by Markov transfer matrix and Pearson correlation analy-sis.The results showed that the reed land,cultivated land and waters were the main land use types,with spatial proportions of 45.66%~ 52.62%,17.92%~29.82% and 11.31%~18.52%,respectively.During 1987—1999,the main land use change was cultivated land into reed land and waters,with the transition probability of 12.84% and 7.2%.During 1999—2007,waters changed into cultivated land and wood land,with the transition probability of 12.76% and 6.37%;reed land changed into cultivated land and construction land,with the transition proba-bility of 3.03% and 2.31%.During 1987—2007,areas of dry grass land and waters reduced 24.06 km2 and 9.92 km2;while areas of cultivated land,construction land and reed land increased 20.98 km2,9.94 km2 and 9.67 km2,respectively.Therefore,the main changing trend during 1987—2007 was dry grass land and waters into cultivated,construction land and reed land.Dry grass land and BOD5 correlated negatively（P=0.048）,while other land use types and CODMn,TN,TP did not correlate significantly.So the land use change did not affect water quality obviously and the dry grass land could reduce BOD5.This study provides useful information for revealing how the land use change affects the water environment in order to improving the water environment in Baiyangdian Lake at watershed scale. |
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| Keywords: | Baiyangdian Lake land use change Markov transfer matrix water quality |
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