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在QSWAT+ SSURGO数据库中管理缺失的MUKEY

Mahesh R Tapas^1,2, Asmita Murumkar^1,2, Chris George³

¹Department of Extension, The Ohio State University, Columbus, OH USA.

|January 9, 2026

概括

本研究介绍了一种QGIS方法,用于修复SSURGO土壤和水评估工具Plus (SWAT+) 数据库中缺失的土壤地图单元密钥 (MUKEY). 这解决了水文响应单位 (HRU) 创建问题,改善了水文建模.

科学领域:

水文和土壤科学水文和土壤科学
地理信息系统 (GIS) 是指地理信息系统.
环境建模环境建模

背景情况:

土壤和水资源评估工具Plus (SWAT+) 是一个重要的水文模型,依赖于来自土壤勘测地理 (SSURGO) 数据库的详细土壤数据.
在SWAT+的SSURGO数据库中缺少地图单位密钥 (MUKEY) 通常会阻止水文响应单位 (HRU) 的生成,从而阻止流域模型的开发.
准确的土壤数据表示对于模拟水流,沉积物运输,营养循环和水文模型中的土地管理影响至关重要.

研究的目的:

提出一种有效的方法来解决QSWAT+ SSURGO数据库中缺少的MUKEY问题.
为了使水文反应单位 (HRU) 能够成功创建SWAT+模型开发.
减少手工劳动,提高水文模型的准确性和准备性.

主要方法:

使用QGIS软件来解决SWAT+ SSURGO数据库中缺少的MUKEY数据的问题.
在QGIS中使用"消除选定的多边形"工具与"最大共同边界"选项将多边形与缺失的MUKEY合并.
在QSWAT+版本3.0.2中利用改进的错误报告来识别缺失的MUKEY.

主要成果:

成功解决了缺少的MUKEY问题,使得用于SWAT+建模的HRU能够生成.
采用QGIS方法可以保持空间连贯性和数据完整性,同时解决数据缺口.
精简的工作流减少了手动干预和模型设置中的错误的可能性.

结论:

这种基于QGIS的方法为SWAT+ SSURGO数据中缺少的MUKEY提供了有效的解决方案,促进了强大的水文建模.
该方法通过确保HRU的创建,提高了SSURGO数据用于SWAT+的可用性.
这种技术有助于使用水文模型进行更准确,更有效的流域评估.

关键词:

地理信息系统 (GIS) 是指地理信息系统.地理空间数据处理技术水文建模水文建模水文反应单位 (HRU)失踪的子失踪的子这是一个SSURGO数据库.斯瓦特+应用程序土壤数据管理管理土壤数据管理空间数据完整性空间数据完整性流域建模流域建模

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