VISUAL MODFLOW Flex (VMOD-Flex)

Purpose:	Groundwater interface for MODFLOW
Developer:	Novametrix
Key Features:	Allows conceptual modeling and numerical modeling; visualization tools, pre-and post-processing of data
Latest Release:	2015, Version 2015.1
OS Platform:	Windows
Cost:	Perpetual License
Related Software:	PMWIN, Aquaveo GMS, iMOD
Website:	Visual MODFLOW home page

Introduction

Visual Modflow–Flex (VMOD-Flex), first released in 1994, is a graphical interface for MODFLOW. The program’s graphical user interface allows pre-processing of data to develop a groundwater flow model, and then graphically visualizes output data. The program is tiered based by having other modules beyond MODFLOW-2005 by incorporating other modules of MODFLOW. The software has been used in a wide variety of applications, including simulating and predicting groundwater conditions, coupled groundwater/surface water interactions, and groundwater management. Visual MODFLOW Flex has a wide variety of applications, including delineating well capture zones for domestic water supply development; designing and optimizing pumping well locations for mine dewatering projects; determining contaminant fate and exposure pathways for risk assessment; simulating surface water – groundwater interactions; watershed scale/regional groundwater modeling; evaluating groundwater remediation systems such as pump and treat; and aquifer storage and recovery (ASR).

The key feature of the VMOD-Flex model is the Graphical User Interface (GUI) that allows for pre-processing of data and visualization of outputs. Visual Modflow has three versions: basic, professional, and premium, which vary based on features and price. . The basic version includes general features of MODFLOW, while the professional and premium versions have additional capabilities, such as parameter estimation, different grid size, and inclusion of different groundwater models that account for salinity or pollutants.

Advantages and Limitations

Advantages	Limitations
Detailed technical reference manual Program includes calibration capability Users may purchase other model components Training is provided by vendors Developed GUI Allows models to be developed conceptually or design	Basic version only allows evaluation of one alternative Tiered pricing Parallel processing is not available for all models
Illustrative Screens

Sample Applications

Africa	East Asia and the Pacific	Europe & Central Asia	Latin America & the Caribbean	Middle East and North Africa	South Asia
	Tanzania (Groundwater Management)		Nicaragua (Regional Model)	Egypt (Sustainable Management)