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Tunnel Groundwater Steady Inflow (Goodman Formula) Calculator

Easily calculate and compute tunnel groundwater steady inflow (goodman formula) calculator with accurate equations, live formulas, and expert guidance.

Calculated Result
26.12 L/min/m

Steady Seepage Inflow per Meter (q)

Steady Seepage Inflow per Meter (q)

26.12 L/min/m

Total Tunnel Inflow M3 Per Hour

783.7

Total Tunnel Inflow Liters Per Sec

217.7

Water Ingress Severity

HEAVY WATER INGRESS (Pre-Excavation Grouting Umbrella Required)

26.12 — L/min/m

Calculation Breakdown

  1. Applied FormulaModels unlined and drained rock tunnel groundwater seepage inflow rates, aquifer permeability k, hydraulic head H, and dewatering pump demand via the classical Goodman analytical equation.q = \frac{2 \pi k H}{\ln\left(\frac{2 H}{r}\right)}, \quad Q_{\text{tot}} = q \cdot L_{\text{tunnel}}

Tunnel Inflow (Goodman Formula) Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.06.5132026Steady Seepage Inflow per Meter (q)

What Is the Tunnel Groundwater Steady Inflow (Goodman Formula) Calculator?

This tool computes tunnel groundwater steady inflow (goodman formula) calculator with high precision arithmetic.

How Does the Tunnel Groundwater Steady Inflow (Goodman Formula) Calculator Work?

Models unlined and drained rock tunnel groundwater seepage inflow rates, aquifer permeability k, hydraulic head H, and dewatering pump demand via the classical Goodman analytical equation.

Tunnel Groundwater Steady Inflow (Goodman Formula) Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

q=2πkHln⁡(2Hr),Qtot=q⋅Ltunnelq = \frac{2 \pi k H}{\ln\left(\frac{2 H}{r}\right)}, \quad Q_{\text{tot}} = q \cdot L_{\text{tunnel}}

Models unlined and drained rock tunnel groundwater seepage inflow rates, aquifer permeability k, hydraulic head H, and dewatering pump demand via the classical Goodman analytical equation.

How to Use the Tunnel Groundwater Steady Inflow (Goodman Formula) Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Tunnel Groundwater Steady Inflow (Goodman Formula) Calculator Example

Input Values:

hydraulicHeadMeters:45
tunnelRadiusMeters:3.5
rockPermeabilityMPerS:0.000005
tunnelLengthMeters:500
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required L/min/m.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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