摘要
根据2012年8—9月大伙房水库上游河流水体采样数据,利用GIS技术和地统计学方法,分析了水质指标TN、TP、NH_4^+-N、COD_(cr)、BOD_5、p H、DO和硅酸盐的空间变异特征,并运用冗余分析的方法识别不同土地利用方式和社会经济状况对河流水质的影响。研究结果表明,大伙房上游河流水质指标在空间分布上存在较大差异,浑河(清原段)水质状况优于社河和苏子河,靠近库区及库区周边小支流水质状况变差。TN、TP、NH_4^+-N、BOD_5和DO的结构比大于75%,说明其空间变化主要由随机性因素引起的,硅酸盐结构比较小,说明其受结构性因素影响显著。土地利用和社会经济的影响在大伙房上游水质空间分布占有重要份额,其中土地利用能解释流域水质变异的16.2%,具体表现为TN和NH_4^+-N含量与草地所占比例呈显著负相关,与耕地所占比例呈显著正相关。TP、COD_(cr)、BOD_5、p H和硅酸盐含量与林地所占比例呈显著负相关,与水域面积、建设用地和未利用地所占比例呈显著正相关。社会经济能解释大伙房上游水质变异的12.1%,主要表现为水体TN、TP含量与人均GDP呈正相关,COD_(cr)和BOD_5含量与工业比重呈正相关。因此,合理配置土地类型、调控工业、农业和服务业等产业结构将在流域水生态管理中起到重要作用。
Spatial variation characteristics of water quality factors,including TN,TP,NH4+-N,CODcr,BOD5,pH,DO and silicate were analyzed by using GIS technique and geo-statistics method based on water sampling data collected in the in upper area of Dahuofang Reservoir from August to September 2012.Responses of water quality to land-use and socioeconomic development were investigated by redundancy analysis.Results showed that there was significant difference in water quality distribution in upper area of Dahuofang Reservoir.The water quality was preferable mainly in upstream of the Hun River,and poor in the surroundings of Dahuofang Reservoir.Distributions of TN,TP,NH4+-N,BOD5 and DO were significantly affected by some random factors because their structure ratio were greater than 75%,and silicate was significantly affected by some structural factors due to the structure ratio was less than 25%.The impact of land use and socioeconomic activity occupied an important share on spatial variation of water quality in upper area of Dahuofang Reservoir.Land use explained 16.2%of the water quality distribution;TN and NH4+-N were negatively related to grass lands,but positively related to agriculture lands.TP,CODcr,BOD5,pH and silicate were negatively related to forest lands,but positively related to water area,building land and unused land.Socioeconomic activity explained 12.1%of the water quality distribution;TN and TP were positively related to per capita GDP;CODcr and BOD5 were positively related to industrial ratio.So using the land resource rationally and regulating the industry structure,such as industry,agriculture and service industry play an important role in watershed ecological management.
作者
王琼
王善祥
范志平
李法云
WANG Qiong;WANG Shanxiang;FAN Zhiping;LI Fayun(Institute of Eco-environmental Sciences,Liaoning Shihua University,Fushun Liaoning 113001,China;Division of Chemistry,Chemical Engineering and Environment,Liaoning Shihua University,Fushun 113001,Liaoning,China)
出处
《生态科学》
CSCD
2018年第2期153-161,共9页
Ecological Science
基金
甘"十二五"国家科技支撑计划项目(2015BAD07B030102)
国家水体污染与治理科技重大专项(2012ZX07505-001-01)
辽宁石油化工大学环境科学与工程学科创新团队([2014]11号)
关键词
水质
土地利用
社会经济
空间异质性
半方差函数
water quality
land use
socioeconomic activity
spatial variability
semi-variant function