Spatial decision system provides a framework for integrating database management systems, analytical models, and graphics to improve the decision-making process from a farm-scale to a regional level. In this study, a graphical user interface for irrigation management has been developed with the support of a geographical information system (GIS) customization using Visual Basic for Application (VBA). Inverse distance weighted (IDW) method is employed to interpolate spatial inputs through an embedded environment provided by the GIS for customization with VBA technique. The developed Interface was used to analyze, simulate, handle, and integrate the irrigation management's spatial data. It can be used effectively from a farm-scale to a regional level and temporal data with interpolation techniques to generate thematic maps of rainfall, effective rainfall, reference evapotranspiration (ETo), crop evapotranspiration (ETc) using weather, crop, and soil data. The tool allows visualization of the spatial distribution of water requirements in the specified region and facilitates the localization of any discrepancies in water management, indicating whether interventions are required. Finally, interface was applied to estimate spatial irrigation water requirement to provide output, i.e., spatial maps of rainfall, effective rainfall, daily ETo, daily ETc, and net irrigation requirement (NIR). ETo was higher at Bhopal, Tikamgarh and Jhansi and lowered at Raisen and Sagar. The generated NIR map shows that the area nearby Khurai station has a higher irrigation requirement. On the other hand, the area covered by Begumganj, Sironj, Tikamgarh, and Banda has lower irrigation requirements. This information may help irrigation management's decision-making from a farm-scale to a regional level in the Betwa River Basin, India.

中文翻译：

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灌溉管理空间决策系统的开发

空间决策系统提供了一个集成数据库管理系统、分析模型和图形的框架，以改进从农场规模到区域级别的决策过程。在这项研究中，在地理信息系统 (GIS) 定制的支持下，使用 Visual Basic for Application (VBA) 开发了用于灌溉管理的图形用户界面。反距离加权 (IDW) 方法用于通过 GIS 提供的嵌入式环境对空间输入进行插值，以便使用 VBA 技术进行定制。开发的接口用于分析、模拟、处理和集成灌溉管理的空间数据。可以有效地使用从农场规模到区域级别的时间数据和插值技术，以生成降雨专题图，有效降雨量、参考蒸散量 (ETo)、使用天气、作物和土壤数据的作物蒸散量 (ETc)。该工具允许可视化指定区域内需水量的空间分布，并有助于定位水资源管理中的任何差异，指示是否需要干预。最后，应用接口估计空间灌溉需水量以提供输出，即降雨量、有效降雨量、每日 ETo、每日 ETc 和净灌溉需求 (NIR) 的空间图。ETo 在 Bhopal、Tikamgarh 和 Jhansi 较高，在 Raisen 和 Sagar 较低。生成的 NIR 地图显示 Khurai 站附近的区域有更高的灌溉需求。另一方面，Begumganj、Sironj、Tikamgarh 和 Banda 覆盖的地区灌溉需求较低。