What's New

This app has been updated by Apple to use the latest Apple signing certificate.

Bug fixes that correct​ data entry on certain size phones

App Description

HYDROLOGY FORMULATOR is the perfect tool for any hydrologist, hydrology student or other professional who needs to deal with the science of water. Over 50 Hydrological formulas are contained in the program in areas of: evaporation, groundwater, Infiltration and Recharge, Lake Pollution, River Pollution, Soil Pollution and Surface Runoff. HYDROLOGY FORMULATOR also includes 300 conversion programs and area formulas.

All formula results can E-mailed. HYDROLOGY . This is still an early version additional formulas will be added with future updates.

The Formulas include:
• Relative Humidity
• Evaporation rate of Lake
• Potential Evapotranspiration

GROUNDWATER
• Storage Properties of Aquifers
• Aquifer Specific Yield
• Storage Coefficient
• Specific Storage
• Storage Coefficient Groundwater
• Reynold Number Groudwater
• Aquifer Transmissivity
• Aquifer Safe Yield

INFILTRATION AND RECHARGE
• Porosity
• Maximum Soil Moisture
• Volumetric Water Content
• Solid Density
• Dry Bulk Density
• Solid Water Pressure
• Hydraulic Head of Soil
• Specific Discharge
• Mean Pore Velocity
• Hydraulic Conductivity
• Infiltration Rate
• Overland Flow
• Holtan’s Model of Infiltration
• Groundwater Recharge
• Lake Pollution
• Waste Entering
• Equilibrium Concentration
• Settling Loss Rate
• Particle Deposition Rate
• River Pollution
• River Oxygen Deficit
• Critical Time for Oxygen Deficit
• Re-Aeration Constants
• Critical Distance For Oxygen Deficit
• River Flow
• Water Temperature
• Dissolved Oxygen
• Effect of waste on Water Quality
• Distance From Source
• Downstream Waste Concentration
• Required Levels
• Non Conservative Substances
• Dispersion Coefficient
• Soil Pollution
• Groundwater Pore Velocity
• Effective Diffusion
• Hydrodynamic Dispersion
• Aquifer Parameter
• Variance Of Pore Velocity
• Surface Runoff
• Urban Hydrology for Small Watersheds
• Average Velocity
• Runoff
• Travel Time
• Sheet Flow Travel Time
• Peak Discharge

iPhone Screenshots

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iPad Screenshots

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App Changes

  • June 24, 2011 New version 2.0
  • October 13, 2011 New version 2.01
  • October 16, 2012 New version 2.5
  • April 19, 2013 New version 2.5.5
  • June 14, 2019 New version 3.01