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使用SWAT-C模型从森林流域减少溶解有机碳的管理策略

Dongjun Lee¹, Ritesh Karki², Latif Kalin³

¹College of Forestry, Wildlife and Environment, Auburn University, Auburn, AL, USA.

Environmental management

|February 20, 2025

概括

量化森林碳循环是复杂的. 这项研究验证了森林流域的土壤和水评估工具-碳 (SWAT-C),发现森林转化为长叶松减少了40%的溶解有机碳 (DOC).

科学领域:

环境科学环境科学
水文学的水文学
森林生态森林生态

背景情况:

森林是重要的碳汇,但它们的碳循环过程是复杂的量化,特别是在流域内.
来自森林的溶解有机碳 (DOC) 运输通过形成消毒副产品,影响饮用水质量.
现有的模型,如土壤和水评估工具-碳 (SWAT-C) 经常在非森林地区进行评估,忽视了森林占主导地位的地区的陆地碳流.

研究的目的:

评估SWAT-C在森林流域模拟陆地和水中碳流的适用性.
为了分析DOC运输在Big Creek流域的景观中占主导地位的途径.
评估管理场景,以减少DOC运输到水生系统.

主要方法:

将SWAT-C模型应用于美国中南部森林密集的Big Creek流域.
利用远程传感数据和其他数据集进行模型校准和验证.
模拟了三个管理场景:森林转型,森林除和调整的耕地生物质收获.

主要成果:

在森林占主导地位的地区,SWAT-C在模拟陆地和水中的碳流方面表现出了熟练.
对占主导地位的土地使用/覆盖类型进行初始化和校准参数,可显著提高模型性能.
所有经过测试的管理场景都减少了DOC运输到河流中;将松转换为长叶松林的结果是40%的DOC减少.

结论:

SWAT-C适用于模拟森林流域的碳流,这对于理解流域规模碳循环至关重要.
有效的管理策略,例如特定的森林转型,可以大幅度减轻森林占主导地位的流域的DOC产量.
在流域模型中,准确地对占主导地位的土地覆盖进行参数化是可靠碳流模拟的关键.

关键词:

溶解有机碳 (DOC) 是一种有机碳.森林森林森林森林管理场景管理场景土壤和水资源评估工具-碳 (SWAT-C)

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