CAJ | 학술논문

随着城市点源污染控制不断完善,城市面源污染已成为危害中国城市水体的重要污染源.由城市土地利用变化引起的地表径流污染是导致湖泊水质恶化和富营养化的主要因素,加强面源污染的源-汇效应研究是控制、管理流域污染的重要途径之一.研究选取中国最大的城市湖泊武汉市东湖为研究对象,运用遥感和GIS技术,进行流域划分和地类解译,建立土地利用基础数据库,后对水质统计数据进行定量化处理,通过建立了地类——湖泊水质关系模型,科学地分析了用地与水质的关系,并对城市湖泊水质的季节动态、影响因素进行了初步探索.研究结果表明土地利用和气候变化对流域内湖泊水质的影响显著.其中,农田和建设用地是城市湖泊面源污染的主要来源,绿地和坑塘水面能够有效的截流、吸收污染物,起到保护湖泊水质的作用;受降水、温度等气候因子的影响,湖泊水质状态呈现季节性波动.研究选取东湖为研究对象,研究面源污染的源-汇效应,具有代表性,对于更好保护城市湖泊,合理利用湖泊资源提供了理论依据.
수착성시점원오염공제불단완선,성시면원오염이성위위해중국성시수체적중요오염원.유성시토지이용변화인기적지표경류오염시도치호박수질악화화부영양화적주요인소,가강면원오염적원-회효응연구시공제、관리류역오염적중요도경지일.연구선취중국최대적성시호박무한시동호위연구대상,운용요감화GIS기술,진행류역화분화지류해역,건립토지이용기출수거고,후대수질통계수거진행정양화처리,통과건립료지류——호박수질관계모형,과학지분석료용지여수질적관계,병대성시호박수질적계절동태、영향인소진행료초보탐색.연구결과표명토지이용화기후변화대류역내호박수질적영향현저.기중,농전화건설용지시성시호박면원오염적주요래원,록지화갱당수면능구유효적절류、흡수오염물,기도보호호박수질적작용;수강수、온도등기후인자적영향,호박수질상태정현계절성파동.연구선취동호위연구대상,연구면원오염적원-회효응,구유대표성,대우경호보호성시호박,합리이용호박자원제공료이론의거.
Although urban point source pollution control has been strengthened in recent years, urban diffuse pollution has become a major source impeding sustainable water development in China. Surface runoff pollution caused by land use change in urban areas is one of the fatal factors causing eutrophication and the deterioration of water environment. As a result. research on source-sink effect would be of significance on pollution control and management, especially in the watershed. We take East Lake in Wuhan as the study area in our research. After the watershed division and land use classification from ETM remotely sensed images, we establish a land-use database thorugh GIS. Then a regression model is set up in an attempt to explore the relationship between lake water quality and different land use types. Analysis is also made on the seasonal dynamics and the influential factor of lake water quality. The results show that land use and climate change exert great influencs on water quality in a watershed. Farmland and construction land are the main source of lake diffuse pollution. Meanwhile green fields and pond water can obstruct and absorb pollutants effectively, which plays a key role in protecting the environment of lakes. Due to physical factors such as precipitation and temperature, water quality presents obvious seasonal fluctuations. Through research on east lake, we discuss source-sink effect of diffuse pollution, which would be meaningful for the protection and rational utilization of lake resource.