--- title: "Hydrology Formulator - Reviews, Revenue and Downloads in Australia | Apple App Store" description: "HYDROLOGY FORMULATOR is the ultimate pocket reference for hydrologists, civil engineers, environmental scientists, and students. Packed with 1,000+ formulas, calculators, and conversions, it cover" --- # Hydrology Formulator — Australia > Calculations on Water ![Hydrology Formulator App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/a0/1e/b2/a01eb288-c496-cf2c-3335-55c47739a771/AppIcon-0-0-1x_U007epad-0-11-0-85-220.png/434x0w.png) **Developer:** [Historycentral.com](https://apptail.io/developer/historycentralcom-xZlg) **Category:** Productivity **Rating:** N/A (0 ratings) **Price:** Free **Bundle ID:** net.multieducator.Hydrology **Store:** Apple App Store **Country:** Australia **Version:** 4.0.2 (released 2026-03-22) **Original Release:** 2009-12-18 **Languages:** English **App Store Link:** [Download on Apple App Store](https://apps.apple.com/au/app/app/id346512904) **AppTail Page:** [https://apptail.io/app/hydrology-formulator-HiOy/australia](https://apptail.io/app/hydrology-formulator-HiOy/australia) ## Hydrology Formulator Description 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 ## Hydrology Formulator Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/af/fc/69/affc6990-ea0b-7100-d353-b59dd145786a/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-03-01_at_09.41.43.png/1320x2868.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/17/57/bd/1757bda0-c786-5cd4-00f3-ce9438a57ce4/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-03-01_at_09.43.00.png/1320x2868.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/fe/5d/15/fe5d151f-d0e7-48b7-15fd-c5965f0c401a/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-03-01_at_09.49.03.png/1320x2868.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/c8/34/39/c8343963-cedd-f6d9-38aa-ab83df6f968e/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-03-01_at_09.41.57.png/1320x2868.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/02/76/66/0276660e-56ef-f8ce-94da-938e7888bd57/Simulator_Screenshot_-_iPhone_17_Pro_Max_-_2026-03-01_at_10.51.34.png/1320x2868.png) ## Hydrology Formulator In-App Purchases | Item | Price | |------|-------| | Pro Version | $5.99 | ## Apps Similar to Hydrology Formulator - [Digby® by OCLC®](https://apptail.io/app/digby-by-oclc-Bvfe/australia) - [GEO5 Data Collector](https://apptail.io/app/geo5-data-collector-WUbm/australia) - [Hercules Moots](https://apptail.io/app/hercules-moots-Sono/australia) - [NotedCut: Video Notetaking](https://apptail.io/app/notedcut-video-notetaking-ewFw/australia) - [NeuronTest.](https://apptail.io/app/neurontest-DzTw/australia) - [PeopleDrop](https://apptail.io/app/peopledrop-Tnwy/australia) - [TagTags – Your Day, Tagged](https://apptail.io/app/tagtags-your-day-tagged-bFHy/australia) - [Time Blocking - DayBloc](https://apptail.io/app/time-blocking-daybloc-FUUy/australia) - [ReadTrace Pro](https://apptail.io/app/readtrace-pro-DyBz/australia) - [WIMS Mobile](https://apptail.io/app/wims-mobile-OSgA/australia) ## Hydrology Formulator Available In - [Australia](https://apptail.io/app/hydrology-formulator-HiOy/australia) - [Chile](https://apptail.io/app/hydrology-formulator-HiOy/chile) - [South Africa](https://apptail.io/app/hydrology-formulator-HiOy/south-africa) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends. - [Search Apps](https://apptail.io) - [Top Charts](https://apptail.io/top-iphone-apps) - [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer) *Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*