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改进SWAT模型的酸盐负载模拟在一个广泛的排水的流域

JungJin Kim¹, Younggu Her², Rabin Bhattarai³

¹Institute of Environmental Technology, Seoul National University of Science and Technology, Seoul, Republic of Korea.

The Science of the total environment

|August 18, 2023

概括

在土壤和水评估工具 (SWAT) 中修订的地下排水建模改进了酸盐负载预测. 这种改进的模型可以更准确地评估农业对水质的影响.

科学领域:

环境科学环境科学
农业工程农业工程
水文学的水文学

背景情况:

地下排水提高了作物生产率,但增加了酸盐的泄.
目前的土壤和水评估工具 (SWAT) 模型简化了酸盐运输,影响了准确性.
准确的酸盐负载预测对于管理农业流域水质至关重要.

研究的目的:

通过修改SWAT地下排水程序来提高酸盐负载预测的准确性.
提高模拟酸盐运输过程在排水的农业系统.
为评估地下排水对水质的影响提供更可靠的工具.

主要方法:

在SWAT模型中修改了地下排水程序.
使用流量和酸盐负载的现场测量验证了增强的SWAT模型.
对影响酸盐运输的关键参数进行了敏感性分析.
模拟了各种深度场景,以评估对冲流和酸盐负载的影响.

主要成果:

修订后的SWAT酸盐程序显著提高了酸盐运输模拟在田间和流域尺度上的准确性.
在现场尺度上,酸盐负载预测的准确性从"不可接受"提高到"令人满意"或"良好".
灵敏度分析确定了透气,地下水排放,流滞后时间和通道液压作为关键参数.
瓦配置场景与已建立的对瓦流动过程的理解保持一致.

结论:

修订后的SWAT酸盐模块提供了一个更准确的工具,用于预测从排水的农田中酸盐负载.
改进的模型可以更好地评估地下排水系统对水质的影响.
这种改进的建模能力支持农业流域的更好的管理实践.

关键词:

校准校准校准校准校准校准校准亚酸盐是一种酸盐.特别突击队的特种部队.灵敏度分析是一种灵敏度分析.瓦排水系统瓦排水

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