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# Generalized Asymmetric Holland Model

The Generalized Asymmetric Holland Model

- markdown file for GAHM on ADCIRCWIKI

GAHM Introduction Content

## Contents

## The Classic Holland Model

## Derivation of the GAHM

## Azimuthally-Varying RMW

## A Linearly-weighted Composite Wind Method

## Case Studies

### Single-Isotach Approach

### Multiple-Isotach Approach

The gradient wind Equation describes a steady flow balanced by the horizontal pressure gradient force, the centripetal acceleration, and the Coriolis acceleration:

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(1)

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(2)

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(3)

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(4)

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**Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle B = (V_{max})^2\rho e/(P_n - P_c) \quad }**

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**Failed to parse (MathML with SVG or PNG fallback (recommended for modern browsers and accessibility tools): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle B_g = (V_{max}^2 + V_{max}R{max}f)\rho e^\psi/\psi(P_n - P_c) = B \frac{(1+1/R_0)e^{\psi - 1}}{\psi} \quad }**

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The Holland Model (1980) is an analytic model that depicts the radial wind and pressure profiles of a hurricane. Starts

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