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引用本文:孙金华,曹晓峰,黄艺.滇池水质时空特征及与流域人类活动的关系.湖泊科学,2012,24(3):347-354. DOI:10.18307/2012.0304
SUN Jinhua,CAO Xiaofeng,HUANG Yi.Relationships between spatial-temporal trends of water quality and the human activities in Lake Dianchi. J. Lake Sci.2012,24(3):347-354. DOI:10.18307/2012.0304
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滇池水质时空特征及与流域人类活动的关系
孙金华1, 曹晓峰2, 黄艺1
1.北京大学环境科学与工程学院, 北京 100871;2.西安科技大学测绘科学与技术学院, 西安 710054
摘要:
湖泊水质与人类活动有着密切的关系,人类活动是湖泊水质恶化的驱动因素.本文在分析1999-2009年滇池水质时空变化特征的基础上,以受人类干扰的土地比例、城镇与湖岸的距离、人口密度、单位土地GDP作为陆地人类活动压力的表征指标,通过对比分析研究滇池水质与人类活动的关系.结果表明:滇池的草海部分和外海部分水质差异显著,草海水质整体较差且呈逐年下降趋势,外海NH3-N、TN、TP浓度明显低于草海,且随时间的变化较小,外海CODMn略低于草海,年际变化与草海相似.城镇用地比例、人口密度、单位土地GDP是草海与外海水质相差悬殊的主导因子;草海汇水区城镇扩张、人口和GDP产值的飞速增长导致草海污染物浓度大幅增加,而河流截污工程、农业农村面源污染的有效控制使外海NH3-N、TN、TP上升不明显甚至有下降趋势.
关键词:  滇池  水质时空特征  人类活动  土地利用  人口密度  GDP
DOI:10.18307/2012.0304
分类号:
基金项目:国家水体污染控制与治理科技重大专项项目(2008ZX07526-002-06)资助
Relationships between spatial-temporal trends of water quality and the human activities in Lake Dianchi
SUN Jinhua1, CAO Xiaofeng2, HUANG Yi1
1.College of Environmental Sciences and Engineering, Peking University, Beijing 100871, P. R. China;2.College of Geomatics, Xi'an University of Science and Technology, Xi'an 710054, P. R. China
Abstract:
Lake water quality is closely related with human activities, and human activities are the driving factors in lake water quality aggravating. Analyzing the spatial-temporal trend of Lake Dianchi in recent ten years, taking proportion of interrupted landuse by human beings, population density, and GDP per square kilometer as human activity indicators, this paper investigated the relationships between lake water quality and human activities in Lake Dianchi watershed. Firstly, as Lake Dianchi is divided into two parts, Lake Caohai is greatly different from Lake Waihai in terms of water quality. Lake Caohai was polluted seriously and getting worse year by year, while the concentrations of NH3-N, TN and TP in Lake Waihai were much lower than those in Lake Caohai, and changed slightly in past ten years. The concentration level of CODMn in Lake Waihai and its changing situation in past ten years was similar to those of Lake Caohai. Secondly, town construction landuse, population density, and GDP per square kilometer were leading factors in causing the differences between Lake Caohai and Lake Waihai. Meanwhile, city and town expanding, and population and GDP growing led to Lake Caohai polluted seriously, while Lake Waihai was less polluted or sometimes, even better (such as TP), perhaps because of non-point pollution control from agriculture and rural area, or the pollution-cutting-engineering at some inflow rivers' watershed.
Key words:  Lake Dianchi  spatial-temporal trends of water quality  human activities  land-use  population density  GDP
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