Discussed with a friend about visual modflow and groundwater vista. I am thinking visual modflow is better while my friend said groundwater vista is a good one. From my point view they are very similar.

Anyway, either software needs data input when running transport modelling. In general, two types of data are needed in a groundwater modelling:

1. various parameters that define hydrogeologic and hydrogeochemical conditions in the problem domain. These parameters constitute the input data for a flow and transport model.
• primarily geometric nature such as the locations of model boundaries, the thicknesses of geologic units, and the extent of existing plumes.
• conventional physical and chemical parameters, such as hydraulic conductivity, porosity, and chemical reaction rate coefficients. and
• parameters related to external stresses, such as contaminant source loading history, recharge and discharge distribution, or injection and extraction rates.

2. Data needed in a simulation includes measured hydraulic heads, flow rates, contaminant arrival times, solute concentrations and/or mass removal rates at the available monitoring points. This type of data is required during the calibration process for comparison with calculated results.