摘要
为全面、详细了解土地利用类型对甬江流域氮磷营养盐的影响,分析了不同水期氮磷营养盐的时空分布特征,并研究土地利用类型面积占比与氮磷营养盐的关系。结果表明:(1)甬江流域氮污染水平较重,磷污染水平较轻,氮营养盐浓度表现为枯水期高于丰水期,而磷营养盐浓度丰水期高于枯水期。(2)建设用地面积占比与溶解态总氮(DTN)、总磷(TP)有正相关关系,林地面积占比与硝酸盐氮、TP、DTN有负相关关系。(3)建议根据不同河段的土地利用类型面积占比差异考虑不同防治策略,姚江及甬江干流流域应增加绿化用地面积,加强对建设用地点源废水排污控制;奉化江流域应加强化肥农药控制,实施“林地+”模式。
In order to comprehensively and specifically study the influence of land use types on nitrogen/phosphorus nutrients in the Yongjiang River Basin,spatial and temporal distribution characteristics were analyzed in different water periods,and the relationship between land use type area percentage and nitrogen/phosphorus nutrients was studied.Results showed as follows:(1)the level of nitrogen pollution in the Yongjiang River Basin was higher,and the level of phosphorus pollution was lower.The concentration of nitrogen in dry season was higher than that in wet season.The concentration of phosphorus in wet season was higher than that in dry season.(2)Construction land area percentage was positively correlated with dissolved total nitrogen and total phosphorus,while forest land area percentage was negatively correlated with dissolved total nitrogen,nitrate nitrogen and total phosphorus.(3)According to different land use type area percentages in different reaches,the main stream of Yongjiang River and Yaojiang River should increase green areas and strengthen control of point source discharge in construction land,and Fenghua River should focus on“forest land+”mode and reduce fertilizer and pesticide.
作者
樊荣
雷坤
郎琪
孙明东
王刚
程全国
FAN Rong;LEI Kun;LANG Qi;SUN Mingdong;WANG Gang;CHENG Quanguo(Key Laboratory of Eco-Restoration of Regional Contaminated Environment(MOE),College of Environment,Shenyang University,Shenyang Liaoning 110044;Institute of Water Ecological Environment,Chinese Academy of Environmental Sciences,Beijing 100012)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2024年第3期451-455,462,共6页
Environmental Pollution & Control
基金
国家重点研发计划项目(No.2021YFC3101705)。
关键词
甬江流域
氮磷营养盐
土地利用类型
时空特征
Yongjiang River Basin
nitrogen/phosphorus nutrients
land use types
spatial and temporal characteristics
