摘要
本研究针对北方某县河道因周边农田和灌溉渠导致的水质不稳定、常年不达标问题,开展生态修复工程。通过建设陆域缓冲区、生态护岸缓冲区等一系列工程措施,考核断面总磷和COD分别降至0.18 mg/L和18 mg/L,达标率提升至100%;水生植被覆盖度大于(含)80%,底栖动物种类从3种增至8~10种,鸟类增加2~3种,水生植被年固碳量达120 t/hm^(2);生态拦截沟渠对总磷和COD的去除率分别为45%~60%和30%~45%,生态护岸减少泥沙流失60%~80%,面源污染负荷削减30%~50%;旨在减少氮磷等有机物进入水体,改善水质,促进流域生态修复。
This study addresses the issue of unstable water quality and chronic non-compliance in a river at the county in northern China,caused by surrounding farmland and irrigation channels,by carrying out ecological restoration projects.Through a series of engineering measures such as constructing land-based buffer zones and ecological shoreline buffer zones,the total phosphorus at the monitoring section was reduced to 0.18 mg/L,and COD was reduced to 18 mg/L,with the compliance rate increased from the current status to 100%;the coverage of aquatic vegetation reached≥80%;the number of benthic animal species increased from 3 to 8~10 species,and the number of bird species increased by 2~3;the annual carbon sequestration of vegetation reached 120 t/hm^(2);the ecological interception channels achieved total phosphorus and COD removal rates of 45%~60%and 30%~45%respectively,and the ecological shorelines reduced sediment loss by 60%~80%,cutting down non-point source pollution load by 30%~50%;the aim is to reduce the entry of organic substances such as nitrogen and phosphorus into water bodies,improve water quality,and promote ecological restoration of the watershed.
作者
李军波
黄亭
侯祎苗
钟焕
栗勇田
李小亚
蒋鹏飞
LI Junbo;HUANG Ting;HOU Yimiao;ZHONG Huan;LI Yongtian;LI Xiaoya;JIANG Pengfei(Hebei Tianda Environmental Research Institute Co.,Ltd./Key Laboratory of Ecosystem Protection and Restoration of Baoding River Basin,Baoding 071000,Hebei,China)
出处
《绿色科技》
2025年第24期110-116,共7页
Journal of Green Science and Technology
基金
河北省保定市科技计划项目(编号:2211F001)。
关键词
生态修复
河道治理
农业面源污染
ecological restoration
river management
agricultural non-point source pollution
