摘要
为探究长江流域稻田湿地的设计要点及运行效果,以环巢湖面积约190 hm^(2)的某稻田湿地为研究对象,开展了为期一年的运行监测。结果表明,稻田湿地对NH_(4)^(+)-N、TN、TP和COD的年削减量分别为60.96、101.50、5.44和692.30 t,月均去除率分别为39.36%~77.25%、46.93%~73.74%、45.61%~72.44%、24.83%~43.15%,出水水质均满足《地表水环境质量标准》(GB 3838—2002)Ⅳ类标准,其中7月—9月出水水质能达到Ⅲ类标准,生态环境明显改善,生物多样性逐渐丰富。稻田湿地的净化效果随季节、运行水位和水稻种植生长情况而变化,在4月旋耕期和10月水稻收割期,稻田湿地以低水位运行,水质净化效果较差;在5月—9月水稻生长期,稻田湿地以中、高水位运行,随着温度升高,水质净化效果逐渐提高并稳定于年度最佳;11月—3月稻田湿地以中、高水位运行,水质净化效果较为稳定。
This paper monitored a paddy wetland with an area of about 190 hm^(2) around Chao Lake for one year to explore the key design points and comprehensive operation performance of paddy wetland in the Yangtze River basin.The paddy wetland demonstrated the annual reduction of 60.96 t,101.50 t,5.44 t and 692.30 t,and the average monthly removal rates of 39.36%-77.25%,46.93%-73.74%,45.61%-72.44%and 24.83%-43.15%for NH_(4)^(+)-N,TN,TP and COD,respectively.The effluent quality met the classⅣlimits specified in Environmental Quality Standards for Surface Water(GB 3838-2002),and the effluent quality from July to September reached the classⅢsurface water standard,indicating that the ecological environment was significantly improved,and the biodiversity was gradually enriched.The purification performance of the paddy wetland varied with the season,water level and rice planting and growth.During the rotary tillage period in April and the rice harvesting period in October,the paddy wetland ran at low water level,and the water purification performance was poor.During the rice growth period from May to September,the paddy wetland ran at medium and high water levels,and the water purification performance gradually improved and reached the best with the increase of temperature.From November to March,the paddy wetland ran at medium and high water levels,and the water purification performance was relatively stable.
作者
乐文彩
张玉
刘青
鲁潇
刘月强
LE Wen-cai;ZHANG Yu;LIU Qing;LU Xiao;LIU Yue-qiang(PowerChina Jiangxi Electric Power Construction Co.Ltd.,Nanchang 330000,China;Jiangxi Academy of Eco-Environmental Sciences and Planning,Nanchang 330000,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2024年第5期111-115,共5页
China Water & Wastewater
关键词
稻田湿地
长江流域
净化效果
水位设计
生态修复
paddy wetland
Yangtze River basin
purification performance
water level design
ecological remediation
