用SWAT-MODFLOW-RT3D模型优化灌和种植策略,以防止Hetao灌区的非点源污染
Yi Liu1, Wenzhi Zeng1, Chang Ao2
1College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China.
The Science of the total environment
|December 3, 2024
概括
在Hetao灌区 (HID) 的非点源 (NPS) 污染使用SWAT-MODFLOW-RT3D模型进行了研究. 缺口灌和薄膜下滴灌显著减少了和的损失,联合策略为NPS污染控制提供了有利的经济效益.
科学领域:
- 环境科学 环境科学
- 水资源管理 水资源管理
- 农业工程 农业工程
背景情况:
- 非点源 (NPS) 污染对赫塔奥灌区 (HID) 的水环境和生态安全构成重大威胁.
- 有效的管理策略对于减轻NPS污染和确保该地区可持续利用水资源至关重要.
研究的目的:
- 开发和验证一个全面的模型 (SWAT-MODFLOW-RT3D) 模拟水文和污染物运输在HID.
- 分析和损失的空间和时间分布.
- 评估各种农业管理实践对NPS污染的影响,并确定具有成本效益的解决方案.
主要方法:
- 使用最新的水文和水质数据建立和校准/验证SWAT-MODFLOW-RT3D (SMFR) 模型.
- 每月排水和污染物运输 (总和总) 的模拟.
- 农业管理实践的场景分析,包括灌制度,薄膜下滴灌 (DIUF) 和作物结构调整.
主要成果:
- 在模拟水文学 (R2 >0.6,NSE >0.7,PBIAS <10%) 和污染物运输 (R2 >0.6,NSE >0.75,PBIAS <20%) 方面,SMFR模型显示出高精度.
- 缺水灌和DIUF显著减少了7.74-9.34%的总 (TN) 和35.12-40.99%的总 (TP).
- 农作物结构调整显示温和降低 (2.66-6.80%),而综合策略,特别是赤字灌与农作物调整,为NPS污染控制提供了最有利的成本效益比率.
结论:
- 经过验证的SMFR模型是理解HID中NPS污染动态的可靠工具.
- 农业管理实践,特别是赤字灌和DIUF,有效地减少了和的损失.
- 将赤字灌与作物结构调整相结合,为Hetao灌区的NPS污染管理提供了一个有希望和经济可行的方法.
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