Comprehensive Hydrology Calculator

Complete hydrology, scour, and afflux analysis as per IRC SP13:2018 Standards

Rational Method

Q = CIA/360

Dicken's Formula

Q = CA³/⁴

Area Velocity Method

Q = A × V

Scour Analysis

Abutment & Pier

Afflux Analysis

Water Level Rise

Input Parameters

Catchment Area (A) [hectares]

Catchment Area (A) [km²]

Runoff Coefficient (C)

Dicken's Coefficient (C)

Rainfall Intensity (I) [mm/hr]

Return Period (years)

Slope (%)

Length of Catchment (L) [m]

Manning's Roughness (n)

Stream Width at Site [m]

Design Discharge (Q) [m³/s]

Number of Upstream Sections

Actions

Number of Downstream Sections

Actions

Pier Width (b) [m]

Pier Length (L) [m]

Pier Shape Factor (K1)

Pier Alignment Factor (K2)

Bed Material Size (D50) [mm]

Abutment Type

Abutment Length (L) [m]

Approach Velocity (V) [m/s]

Flow Depth (y) [m]

Bridge Opening Width [m]

Natural Channel Width [m]

Design Discharge (Q) [m³/s]

Afflux Coefficient (K)

Calculation Status

Rational Method

Pending

Dicken's Formula

Pending

Area Velocity

Pending

Scour Analysis

Pending

Afflux Analysis

Pending

Summary Report

Pending

Method Comparison

Method	Formula	Peak Discharge	Unit	IRC SP13 Clause	Status

Comprehensive Hydrology Calculator

Rational Method

Dicken's Formula

Area Velocity Method

Scour Analysis

Afflux Analysis

Input Parameters

Calculation Status

Rational Method

Dicken's Formula

Area Velocity

Scour Analysis

Afflux Analysis

Summary Report

Method Comparison

Rational Method Details

Dicken's Formula Details

Area Velocity Method Details

Scour Analysis

Pier Scour

Abutment Scour

Afflux Analysis

Comprehensive Summary Report

Cross-Section Plots

Export Results