评估从流域到中国莱州湾的农药运输和出口动态
Jingyu Zhang1, Jing Zhao2, Weimin Gao3
1Key Laboratory of Marine Chemistry Theory and Technology, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
Marine pollution bulletin
|August 17, 2025
概括
一个新的模型显示,从2001年到2023年,农药出口到莱州湾的数量有所下降. 大多数农药留在土壤和河流中,只有不到3%的农药进入海洋,这凸显了有效的流域管理需求.
科学领域:
- 环境科学 环境科学
- 水资源管理 水资源管理
- 生态毒理学 生态毒理学
背景情况:
- 流域的农药残留物对海洋生态系统健康构成重大威胁.
- 现有的农药运输和流量的模型不足以进行全面的评估.
- 了解流域出口对于减轻海洋污染至关重要.
研究的目的:
- 开发和应用农药从流域出口到海洋 (PEWS) 模型.
- 评估四种关键农药 (阿特拉辛,尼科硫,pyrifos,伊米达克洛普里德) 在莱州湾的时空分布和流动.
- 量化农药运输动态从流域到海洋环境.
主要方法:
- 开发PEWS模型,整合全球新闻和SWAT框架.
- 使用现场调查和地理信息系统 (GIS) 数据进行校准和分析.
- 农药流动和出口途径的时空空间分析.
主要成果:
- 从2001年到2023年,农药流入莱州湾的趋势呈下降趋势.
- 在2023年的年度流量:阿特拉 (11.5 × 103公斤/年),尼科硫 (0.1 × 103公斤/年),pyrifos (0.01 × 103公斤/年),伊米达克洛普里德 (0.6 × 103公斤/年).
- 季节性流量在夏季达到峰值;空间分布因农药和河流流域而异,农业地区的流量最高.
结论:
- 不到3%的农药总量被输出到海上,大部分留在土壤和河流系统中.
- PEWS模型为量化流域规模农药出口提供了一个强大的工具.
- 研究结果支持制定有针对性的策略,以控制海洋生态系统中的农药污染.
相关概念视频
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