At H2H Associates, LLC, we take pride in our comprehensive
and consistent approach to water resource management and 
environmental site characterizations. We synthesize all available
hydrogeologic data into a comprehensive, site-specific conceptual 
models that function as central databases, which in turn, facilitate 
the interpretation of existing hydrogeologic conditions and 
subsequent predictive modeling efforts. To maintain consistency, 
we apply a standardized approach to developing conceptual 
models and the subsequent interface with predictive modeling 
methods. We describe this as a Dual Modeling Approach™ 
wherein  the conceptual modeling is incorporated into a Geologic 
Framework Model (GFM) and the predictive modeling is 
incorporated into a Hydrogeologic Site Model™ (HSM). 
         
The purpose of the GFM is to incorporate geologic, hydraulic, 
contaminant and structural data into a grid-based, visual, and 
query-able interpretative model of existing conditions. The HSM™ 
uses the gridded data exported from the GFM to define grid 
frameworks and initial conditions for predictive modeling efforts. 
EarthVision® (EV) is the best modeling software for the 
development of a GFM because it uses deterministic and/or
stochastic methods to model spatial relationships between 
geologic surfaces, parameter distributions and engineered features 
in the subsurface. An HSM™ can then be constructed with a 
variety of software such as MODFLOW or the more sophisticated 
FEFLOW through the use of grids exported from the EV models. 
         
There are many benefits of a Dual Modeling Approach™ to 
groundwater resource management and site characterization 
efforts. The development of a GFM independently provides for 
better interpretations of site data, increased access to those 
interpretations, and the ability to rapidly update model 
interpretations as new data becomes available. Incorporation of 
GFM grids into an HSM™ reduces model development time and 
provides for better and more rapid model calibrations because 
model frameworks can embrace more site complexities. We have 
applied the Dual Modeling Approach™ to a large tunnel-
construction project in New York City and an industrial 
contamination site in Florida with positive results and are currently 
proposing this approach to the management of groundwater 
resources in the Delaware River Basin of Pennsylvania. 

Hardware

Software