MHPT.BAS: a computer program for modified HillPiper diagram for classification of ground water
The HillPiper diagram is a widely used trilinear diagram to represent the chemical composition of natural waters, which aids the interpretation of the genesis of the chemical character of the groundwater in an aquifer. Handa extended this diagram by combining it with a modified U.S. Salinity Research Laboratory diagram, representing salinity by a single point in an extended diamond field instead of a circle, whose diameter is equivalent to its total dissolved solids. This modified diagram can also be used to determine the suitability of water for irrigation purpose. The code MHPT.BAS is written in BASIC. It gives either descriptive or graphic output, or both. For descriptive output, the program takes about 2s to classify the data of 1000 water samples if it runs on Pentium under WINDOWS 95 and for the same data the program takes about 15s if it runs under MSDOS. The graphic output can be obtained on dot matrix, inkjet or laser printers. The use of the program is demonstrated with a case study of the lower Vamsadhara river basin.
trilinear basic piper hydrochemical facies