Hydrology Formulator

Name: Hydrology Formulator
Rating: 5 (1 reviews)
Author: Historycentral.com

Calculations on Water

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

1 Rating
Age Rating

4+
Years
Category

Productivity
Developer

Historycentral.com
Language

EN
English
Size

18.6
MB

HYDROLOGY FORMULATOR is the ultimate pocket reference for hydrologists, civil engineers, environmental scientists, and students. Packed with 1,000+ formulas, calculators, and conversions, it covers everything from groundwater analysis to stormwater design — all in one powerful app. HYDROLOGY CALCULATORS Infiltration & Recharge — 17 Calculators - Porosity, Green-Ampt Infiltration, Horton Infiltration, Philip Infiltration, Holtan's Model, Hydraulic Conductivity, Groundwater Recharge, Mean Pore Velocity, Specific Discharge, Volumetric Water Content, and more Evaporation & Transpiration — 8 Calculators - Penman-Monteith ET0, Blaney-Criddle ET, Thornthwaite PET, Crop Evapotranspiration, Saturation Vapor Pressure, Evaporation Rate of Lake, Relative Humidity, Potential Evapotranspiration Open Channel Flow — 12 Calculators - Manning's Equation (SI & US), Chezy Equation, Froude Number, Hydraulic Radius, Hydraulic Jump, Critical Depth, Specific Energy, Reynolds Number, and more Pipe Flow — 7 Calculators - Darcy-Weisbach Equation, Hazen-Williams Velocity (SI & US), Reynolds Number, Water Hammer Pressure, Continuity Equation, Minor Head Loss Stormwater & Watershed — 9 Calculators - SCS Curve Number Runoff, SCS Peak Discharge, IDF Rainfall Intensity, Kirpich Time of Concentration, Gumbel Extreme Value, Detention Storage Volume, Composite Curve Number, and more Pumps & Water Supply — 7 Calculators - Total Dynamic Head, Water Horsepower, Brake Horsepower, NPSHa, Affinity Laws for Flow, Head, and Power Weirs & Orifices — 6 Calculators - Rectangular Weir (SI & US), V-Notch Weir, Broad-Crested Weir, Orifice Flow, Spillway Discharge Water Flow — 10 Calculators - Water Flow Rate, Velocity of Water, Volume of Water Flow, 90° V-Notch calculations, Pipe Total Diameter, and more Surface Runoff — 6 Calculators - Average Velocity, Runoff, Travel Time, Hourly Rate of Rainfall Groundwater — 7 Calculators - Darcy's Law, Thiem Equation, Cooper-Jacob Drawdown, Dupuit Well Flow, Radius of Influence, Storage Properties Soil Pollution — 5 Calculators - Groundwater Pore Velocity, Effective Diffusion, Hydrodynamic Dispersion, Aquifer Parameter, Variance of Pore Velocity River Pollution — 7 Calculators - River Oxygen Deficit, Critical Time & Distance for Oxygen Deficit, Re-Aeration Constants, Dissolved Oxygen, River Flow, Water Temperature Lake Pollution — 4 Calculators - Waste Entering, Equilibrium Concentration, Settling Loss Rate, Particle Deposition Rate Sediment Transport — 4 Calculators - Shields Parameter, Bed Shear Stress, Stokes' Law Settling Velocity, Meyer-Peter Müller Bedload Snow Hydrology — 2 Calculators - Snow Water Equivalent, Degree-Day Snowmelt Culvert Hydraulics — 2 Calculators - Culvert Headwater (Outlet Control), Culvert Outlet Control Head Loss Flood Routing - Muskingum Routing Water Balance - Water Balance Equation, Storage Continuity Plus: Area Formulas, Pollution Cleanup, and more CONVERSIONS & REFERENCE Hundreds of built-in conversions across 16 categories including: - Liquid Measures, Cubic Measures, Linear Measures, Square Measures - Flow Rates, Pressures, Horsepower, BTU, Watts, Power - Hydraulic Conversions, Sand-to-Volume, Ft-Lbs - 8 Temperature Scales (Celsius, Fahrenheit, Kelvin, Rankine, Réaumur, Newton, Delisle, Rømer) - Metric Conversions and Fraction Conversions KEY FEATURES - Save and review past calculations - Switch between US (Imperial) and Metric units - Clean, intuitive interface designed for field and office use - Premium upgrade unlocks Groundwater, Pollution, Sediment Transport, Snow Hydrology, Culvert Hydraulics, and Flood Routing calculators

Ratings & Reviews

5.0

out of 5

1 Ratings

A good tool..but
09/03/2010
Cfloweriii
All sorts of great calculators ...but what's up with the long scrolling to find anything. Some menus would be nice. Also the words are too big and u can't see most of the description of what your clicking on!! But I give 3 stars cuz it's the only hydrology app! Please update this sucker...it was 5 bucks!!
A good tool..but
09/03/2010
Cfloweriii

All sorts of great calculators ...but what's up with the long scrolling to find anything. Some menus would be nice. Also the words are too big and u can't see most of the description of what your clicking on!! But I give 3 stars cuz it's the only hydrology app! Please update this sucker...it was 5 bucks!!
Needed additions
04/21/2010
Tosser1
Not a bad start. How about adding a conversions calculator for hydraulic conductivity that includes cm/s, ft/d, gal/d/ft2, and other commonly used units, and the analogous units for transmissivity.
Needed additions
04/21/2010
Tosser1

Not a bad start. How about adding a conversions calculator for hydraulic conductivity that includes cm/s, ft/d, gal/d/ft2, and other commonly used units, and the analogous units for transmissivity.
Not very user friendly
05/13/2011
Thunupa
Needs a better interface. Formulas should be shown. Text gets cut off on menus. Please update. You can do much better. No sediment transport equations. Come on!!
Not very user friendly
05/13/2011
Thunupa

Needs a better interface. Formulas should be shown. Text gets cut off on menus. Please update. You can do much better. No sediment transport equations. Come on!!
Not quite ready for professional use.
06/04/2010
Symbeosis1
great idea but needs more transparecy in formulas, more useful formulas, recommendations for obscure values (e.g. Vapor pressure), easier use of English units.
Not quite ready for professional use.
06/04/2010
Symbeosis1

great idea but needs more transparecy in formulas, more useful formulas, recommendations for obscure values (e.g. Vapor pressure), easier use of English units.

Minor bug fixes

Version 4.0.2 Mar 22

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Accessibility

Information

Seller: Historycentral.com Inc
Size: 18.6 MB
Category: Productivity
Compatibility: Requires iOS 18.6 or later.

iPhone
Requires iOS 18.6 or later.

iPad
Requires iPadOS 18.6 or later.

Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later.

Apple Vision
Requires visionOS 2.6 or later.
Languages: English
Age Rating: 4+

4+

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In-App Purchases: Yes

Pro Version $3.99

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