太湖蓝藻水华发生风险区划
- 海之魂
-
1 次阅读
-
0 次下载
-
2020-03-14 10:36:36
文档简介:
.,.Sci.(湖泊科学),2015,27(6):1133—1139D0I10.18307/2015.0619@2015byJournalofLakeSciences太湖蓝藻水华发生风险区划张艳会,李伟峰”,陈求稳。(1:中国科学院南京地理与湖泊研究所流域地理学重点实验室,南京210008)(2:中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085)(3:南京水利科学研究院生态环境研究中心,南京210029)摘要:湖泊水华是全世界面临的严重生态环境问题之一,对人类和生态系统健康都有重大影响.以太湖为研究区域,基于近年的蓝藻水华及水环境监测数据,结合自组织特征映射神经网络和模糊风险评价方法,对太湖不同监测点蓝藻水华的发生风险进行综合评价,并借助GIS地学统计分析方法对全太湖蓝藻水华发生风险进行区划,绘制太湖蓝藻水华发生风险区划图.结果表明:太湖被分为重度风险区、中度风险区、轻度风险区、微风险区,各风险区基本呈带状分布.从各风险区面积来看,重度风险区、中度风险区、轻度风险区的面积约各占太湖总面积的1/5,而微风险区约占太湖总面积的2/5;从各风险区位置来看,重度风险区主要分布在西北部区域,且从整个湖区来看,蓝藻水华的发生风险等级自西北到东南依次递减.本研究揭示太湖水华灾害风险的空间分布规律,对支撑水环境监测和水华灾害防治方案的制定具有一定的意义.关键词:太湖;蓝藻水华;风险评价;风险区划AlgaebloomriskzoningofLakeTaihuZHANGYanhui.LIWeifeng&CHENQiuwen(1:KeyLaboratoryofWatershedGeographicSciences,NanjingInstituteofGeographyandLimnology,ChineseAcademyofSciences,Nanjing210008,尸.R.China)(2:StateKeyLaboratoryofUrbanandRegionalEcology,ResearchCenterforEco-EnvironmentalSciences,ChineseAcademyofSciences,Beijing100085,P.R.China)(3:Eco-EnvironmentalResearchCenter,NanjingHydraulicResearchInstitute,Nanfing210029,P.R.China)Abstract:Waterbloomisoneofthemostseriousecologicalenvironmentalproblems,whichthreatenthehealthofhumanbeingandlocalecosystems.Inthisstudy,wetokLakeTaihuinChinaasthestudyarea,andaccessedtheoccurrenceriskofblue—greenal·gaebloomscomprehensivelybasedontheindividualsite,combiningself-organizingfeaturemapneuralnetworkandfuzzyriskas-sessmentmethod.ThenWeexploitedtheblue—greenalgaebloomriskzoninganddrawthezoningmapbasedontheindividualsitespecificblue-greenalgaebloomriskassessmentthroughGISgeologicalstatisticsanalysismethod.TheassessmentresultsshowedthatthewholeLakeTaihuWasdividedintofourriskzones:severzone,moderatezone,mildzoneandnoneriskzone。distriburingalongtheaelinicaspectoftheslopefromnorthwesttosoutheast.Asawhole,3/5ofLakeTalhufacedblue-greenalgaebloomOC—currenceriskandonlylessthan2/5lakeareawaslittleornorisk.Theblue—greenalgaeblomoccurrenceriskpresentedanobvi—OUSmitigationfromthenorthwesttothesoutheast,wherethemostseverriskzonewasonthenorth—west.In
评论
发表评论