Channel Flow Calculator Professional-grade Open Channel Hydraulics tool based on Manning’s Equation for engineering and agricultural precision. Input Parameters Manning’s Roughness (n) (Concrete: 0.013, Earth: 0.025, Natural Stream: 0.035) Channel Bottom Width (b) [m] Flow Depth (y) [m] Channel Slope (S) [m/m] Calculate Discharge Enter parameters and click calculate to see hydrological data. Calculation Results […]
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Peak Discharge Calculator Reliable Hydrological Engineering Tool Runoff Coefficient (C) (Range: 0.01 to 1.0) Rainfall Intensity (i) [in/hr] Drainage Area (A) [Acres] Calculate Result Estimated Peak Discharge (Q): 0.00 cfs The Peak Discharge Calculator is an essential instrument for hydrologists, civil engineers, and environmental planners. Understanding peak runoff is critical for designing safe and efficient
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Flood Frequency Calculator Accurate flood frequency analysis tool based on established hydrological methods including Gumbel (Extreme Value Type I) and Log-Pearson Type III distributions. About the Flood Frequency Calculator The Flood Frequency Calculator is a powerful, science-based online tool designed to help engineers, hydrologists, planners, and agricultural professionals estimate the magnitude of floods for specific
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Hydrograph Analysis Calculator Analyze Your Hydrograph Data Enter time-discharge data pairs below to visualize the hydrograph and compute key parameters based on established hydrological principles. Watershed Area (km² or mi²): Time Unit: HoursMinutes Time-Discharge Pairs (one per line, format: time discharge): Analyze Hydrograph Analysis Results About the Hydrograph Analysis Calculator The Hydrograph Analysis Calculator is
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Runoff Coefficient Calculator Runoff Coefficient Calculator is a practical hydrology tool for estimating peak stormwater runoff using the Rational Method, widely applied in civil engineering, urban planning, drainage design, and agricultural water management. This Runoff Coefficient Calculator helps users determine peak runoff discharge (Q) from rainfall intensity, drainage area, and a composite runoff coefficient (C)
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Infiltration Rate Calculator Infiltration Rate Calculator is a practical hydrology and soil science tool for estimating the rate at which water enters the soil surface over time, essential for agriculture, irrigation, stormwater management, and watershed modeling. This Infiltration Rate Calculator implements the classic Horton infiltration equation, an empirically derived and widely validated model from field
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Cone of Depression Calculator Cone of Depression Calculator is an essential hydrogeology tool for estimating drawdown and the radius of influence around a pumping well in groundwater systems. This Cone of Depression Calculator helps hydrogeologists, engineers, farmers, and environmental professionals model the lowering of the water table (or potentiometric surface) due to well pumping under
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Drawdown Calculator Calculate Drawdown (s) Select the method and enter the required parameters. All units must be consistent (e.g., Q in m³/day, T in m²/day, r in m, t in days, S dimensionless). Calculation Method: Theis Method (Transient, Confined Aquifer)Cooper-Jacob Approximation (Late-time, Confined)Thiem Equation (Steady-State, Confined) Pumping Rate (Q): Transmissivity (T): Distance from
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Well Efficiency Calculator The Well Efficiency Calculator is a practical online tool designed to help hydrogeologists, well owners, water engineers, and farmers quickly estimate well efficiency (%) based on established groundwater hydrology principles. Well efficiency is a key performance indicator in well testing, showing what percentage of observed drawdown is due to natural aquifer losses
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Storativity Calculator Calculate Storativity (S) Select aquifer type and enter the required parameters. Aquifer Type: Confined AquiferUnconfined Aquifer Specific Storage (Ss) [1/m or 1/ft]: Aquifer Thickness (b) [m or ft]: Specific Yield (Sy) [dimensionless, 0-1]: Specific Storage (Ss) [1/m or 1/ft]: Aquifer Thickness (b) [m or ft]: Calculate Storativity About the Storativity Calculator
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