除农业之外:土地使用门,管理大城市地表水中的农药混合物风险
Xinying Guo1, Ying Luo2, Huiyu Xie3
1State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing 100012, China; China National Environmental Monitoring Centre, Beijing 100012, China.
Journal of hazardous materials
|May 23, 2025
概括
城市土地使用对地表水中的农药风险产生重大影响,超过了农业效应. 确定了农田 (10-25%) 和城市地区 (10-30%) 的关键值,为水质管理提供了信息.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 水质管理水质管理
背景情况:
- 人们越来越担心在地表水生态系统中农药混合物的风险.
- 人类活动,特别是土地利用与这些风险相关联的机制尚未得到充分研究.
研究的目的:
- 调查土地利用模式与地表水中的混合农药生态风险之间的关系.
- 量化不同土地使用类型对各种空间尺度的农药风险的影响.
主要方法:
- 结合多个规模的土地利用分析与生态农药风险评估.
- 利用通用添加模型 (GAM) 确定关键的缓冲区 (城市地区1-3公里,农田地区2-3公里).
- 使用非参数变化点分析来确定触发生态风险增加的土地使用门.
主要成果:
- 城市土地使用对农药生态风险的影响被发现比农业影响更为重要.
- 观察到依赖空间规模的效应,特定的缓冲区显示了关键影响.
- 确定了关键的土地使用门:10-25%的耕地和10-30%的城市地区.
结论:
- 城市化在农药污染中起着至关重要的作用,挑战了仅仅关注农业的传统观点.
- 确定的定量值为景观规划和有效的农药风险管理提供了基础.
- 为农药污染控制和水质管理提供了新的视角,特别是在城市环境中.
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