Hydrogeochemical diagrams are powerful tools facilitating hydrogeochemical research, among which Piper diagram, Gibbs diagrams, USSL diagram, Wilcox diagram and PI classification diagram are widely applied. However, it is usually tedious and time-consuming to draw these diagrams, not only because of the complex procedures to treat input data, but also due to the different software used. It is always required that several pieces of software should be used for a single hydrochemical study. Therefore, this study reported a MATLAB based graphical user interface (GUI) to overcome these shortages. Three simple steps are included in the GUI to draw a diagram. The frame of the diagram to be drawn is first selected from the database of the GUI, after which the input data (water sample data) are imported into the GUI and the properties of the points such as the sizes, colors and shapes are set. Finally, the diagrams produced can be exported from the GUI as images. This MATLAB based GUI is capable of generating quickly five types of diagrams that are commonly used in hydrogeochemical research. The codes of the GUI and related functions can be adjusted according to the user’s needs. It is helpful to reduce the time spent in drawing these hydrochemical diagrams.

水文地球化学图是促进水文地球化学研究的强大工具，其中Piper图，Gibbs图，USSL图，Wilcox图和PI分类图得到了广泛应用。但是，绘制这些图通常很繁琐且耗时，这不仅是因为处理输入数据的过程很复杂，而且还因为所使用的软件不同。始终要求将多个软件用于一次水化学研究。因此，本研究报告了基于MATLAB的图形用户界面（GUI），以克服这些不足。GUI中包括三个简单的步骤来绘制图表。首先从GUI的数据库中选择要绘制的图的框架，然后将输入数据（水样数据）导入GUI，并设置点的属性，例如大小，颜色和形状。最后，生成的图可以从GUI导出为图像。这种基于MATLAB的GUI能够快速生成五种类型的图，这些图通常用于水文地球化学研究中。GUI的代码和相关功能可以根据用户需要进行调整。减少绘制这些水化学图所花费的时间是有帮助的。