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Fetch and Depth Limited Waves, USGS.html
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<!doctype html>
<head>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<meta charset="utf-8">
<title>Fetch and Depth Limited Waves, USGS</title>
<meta name="publisher" content="USGS - U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center"/>
<meta name="author" content="Chris Sherwood" />
<meta name="description" content="This Javascript app implements Eqns. 3-39 and 3-40 from the Shore Protection Manual."/>
<meta name="keywords" content="Woods Hole Coastal and Marine Science Center, U.S. Geological Survey, Coastal and Marine Geology Program, Coastal Model Tool Set, sediment transport, modeling, "/>
<meta name="created" content="20150406"/>
<meta name="expires" content="never"/>
<meta name="copyright" content="none"/>
<meta name="revised" content=""/>
<meta name="state" content="Massachusetts"/>
<meta name="city" content="Woods Hole"/>
<meta name="zip" content="02543"/>
<meta name="country" content="United States of America"/>
<meta name="language" value="EN"><meta name="viewport" content="width=device-width, initial-scale=1">
<style>
/*! normalize.css v3.0.2 | MIT License | git.io/normalize */
/**
* 1. Set default font family to sans-serif.
* 2. Prevent iOS text size adjust after orientation change, without disabling
* user zoom.
*/
html {
font-family: sans-serif; /* 1 */
-ms-text-size-adjust: 100%; /* 2 */
-webkit-text-size-adjust: 100%; /* 2 */
}
/**
* Remove default margin.
*/
body {
margin: 0;
}
/* HTML5 display definitions
========================================================================== */
/**
* Correct `block` display not defined for any HTML5 element in IE 8/9.
* Correct `block` display not defined for `details` or `summary` in IE 10/11
* and Firefox.
* Correct `block` display not defined for `main` in IE 11.
*/
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
main,
menu,
nav,
section,
summary {
display: block;
}
/**
* 1. Correct `inline-block` display not defined in IE 8/9.
* 2. Normalize vertical alignment of `progress` in Chrome, Firefox, and Opera.
*/
audio,
canvas,
progress,
video {
display: inline-block; /* 1 */
vertical-align: baseline; /* 2 */
}
/**
* Prevent modern browsers from displaying `audio` without controls.
* Remove excess height in iOS 5 devices.
*/
audio:not([controls]) {
display: none;
height: 0;
}
/**
* Address `[hidden]` styling not present in IE 8/9/10.
* Hide the `template` element in IE 8/9/11, Safari, and Firefox < 22.
*/
[hidden],
template {
display: none;
}
/* Links
========================================================================== */
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a {
background-color: transparent;
}
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* Improve readability when focused and also mouse hovered in all browsers.
*/
a:active,
a:hover {
outline: 0;
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/* Text-level semantics
========================================================================== */
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* Address styling not present in IE 8/9/10/11, Safari, and Chrome.
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abbr[title] {
border-bottom: 1px dotted;
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* Address style set to `bolder` in Firefox 4+, Safari, and Chrome.
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* Remove border when inside `a` element in IE 8/9/10.
*/
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border: 0;
}
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*/
svg:not(:root) {
overflow: hidden;
}
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========================================================================== */
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* Address margin not present in IE 8/9 and Safari.
*/
figure {
margin: 1em 40px;
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-moz-box-sizing: content-box;
box-sizing: content-box;
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*/
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* Known issue: affects color of disabled elements.
* 2. Correct font properties not being inherited.
* 3. Address margins set differently in Firefox 4+, Safari, and Chrome.
*/
button,
input,
optgroup,
select,
textarea {
color: inherit; /* 1 */
font: inherit; /* 2 */
margin: 0; /* 3 */
}
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*/
button {
overflow: visible;
}
/**
* Address inconsistent `text-transform` inheritance for `button` and `select`.
* All other form control elements do not inherit `text-transform` values.
* Correct `button` style inheritance in Firefox, IE 8/9/10/11, and Opera.
* Correct `select` style inheritance in Firefox.
*/
button,
select {
text-transform: none;
}
/**
* 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
* and `video` controls.
* 2. Correct inability to style clickable `input` types in iOS.
* 3. Improve usability and consistency of cursor style between image-type
* `input` and others.
*/
button,
html input[type="button"], /* 1 */
input[type="reset"],
input[type="submit"] {
-webkit-appearance: button; /* 2 */
cursor: pointer; /* 3 */
}
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*/
button[disabled],
html input[disabled] {
cursor: default;
}
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button::-moz-focus-inner,
input::-moz-focus-inner {
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}
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*/
input {
line-height: normal;
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}
/**
* It's recommended that you don't attempt to style these elements.
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* 1. Address box sizing set to `content-box` in IE 8/9/10.
* 2. Remove excess padding in IE 8/9/10.
*/
input[type="checkbox"],
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input[type="number"]::-webkit-inner-spin-button,
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height: auto;
}
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*/
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box-sizing: content-box;
}
/**
* Remove inner padding and search cancel button in Safari and Chrome on OS X.
* Safari (but not Chrome) clips the cancel button when the search input has
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*/
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input[type="search"]::-webkit-search-decoration {
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}
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*/
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border: 0; /* 1 */
padding: 0; /* 2 */
}
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overflow: auto;
}
/**
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* NOTE: the default cannot safely be changed in Chrome and Safari on OS X.
*/
optgroup {
font-weight: bold;
}
/* Tables
========================================================================== */
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table {
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th {
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}
/*
* Skeleton V2.0.4
* Copyright 2014, Dave Gamache
* www.getskeleton.com
* Free to use under the MIT license.
* http://www.opensource.org/licenses/mit-license.php
* 12/29/2014
*/
/* Table of contents
––––––––––––––––––––––––––––––––––––––––––––––––––
- Grid
- Base Styles
- Typography
- Links
- Buttons
- Forms
- Lists
- Code
- Tables
- Spacing
- Utilities
- Clearing
- Media Queries
*/
/* Grid
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.container {
position: relative;
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max-width: 960px;
margin: 0 auto;
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box-sizing: border-box; }
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}
/* Base Styles
–––––––––––––––––––––––––––––––––––––––––––––––––– */
/* NOTE
html is set to 62.5% so that all the REM measurements throughout Skeleton
are based on 10px sizing. So basically 1.5rem = 15px :) */
html {
font-size: 62.5%; }
body {
font-size: 1.25em; /* currently ems cause chrome bug misinterpreting rems on body element */
line-height: 1.2;
font-weight: 400;
font-family: "Raleway", "HelveticaNeue", "Helvetica Neue", Helvetica, Arial, sans-serif;
color: #222; }
/* Typography
–––––––––––––––––––––––––––––––––––––––––––––––––– */
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margin-bottom: .75rem;
font-weight: 300; }
h1 { font-size: 2.8rem; line-height: 1.2; letter-spacing: -.1rem;}
h2 { font-size: 2.6rem; line-height: 1.25; letter-spacing: -.1rem; }
h3 { font-size: 2.4rem; line-height: 1.3; letter-spacing: -.1rem; }
h4 { font-size: 2.0rem; line-height: 1.35; letter-spacing: -.08rem; }
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h2 { font-size: 2.6rem; }
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h4 { font-size: 2.0rem; }
h5 { font-size: 1.8rem; }
h6 { font-size: 1.6rem; }
}
p {
margin-top: 0; }
/* Links
–––––––––––––––––––––––––––––––––––––––––––––––––– */
a {
color: #00264C; }
a:hover {
color: #0FA0CE; }
/* Buttons
–––––––––––––––––––––––––––––––––––––––––––––––––– */
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button,
input[type="submit"],
input[type="reset"],
input[type="button"] {
display: inline-block;
height: 38px;
padding: 0 30px;
color: #555;
text-align: center;
font-size: 11px;
font-weight: 600;
line-height: 38px;
letter-spacing: .1rem;
text-transform: uppercase;
text-decoration: none;
white-space: nowrap;
background-color: transparent;
border-radius: 4px;
border: 1px solid #bbb;
cursor: pointer;
box-sizing: border-box; }
.button:hover,
button:hover,
input[type="submit"]:hover,
input[type="reset"]:hover,
input[type="button"]:hover,
.button:focus,
button:focus,
input[type="submit"]:focus,
input[type="reset"]:focus,
input[type="button"]:focus {
color: #333;
border-color: #888;
outline: 0; }
.button.button-primary,
button.button-primary,
input[type="submit"].button-primary,
input[type="reset"].button-primary,
input[type="button"].button-primary {
color: #FFF;
background-color: #33C3F0;
border-color: #33C3F0; }
.button.button-primary:hover,
button.button-primary:hover,
input[type="submit"].button-primary:hover,
input[type="reset"].button-primary:hover,
input[type="button"].button-primary:hover,
.button.button-primary:focus,
button.button-primary:focus,
input[type="submit"].button-primary:focus,
input[type="reset"].button-primary:focus,
input[type="button"].button-primary:focus {
color: #FFF;
background-color: #00264C;
border-color: #00264C; }
/* Forms
–––––––––––––––––––––––––––––––––––––––––––––––––– */
input[type="email"],
input[type="number"],
input[type="search"],
input[type="text"],
input[type="tel"],
input[type="url"],
input[type="password"],
textarea,
select {
height: 28px;
padding: 6px 5px; /* The 6px vertically centers text on FF, ignored by Webkit */
background-color: #fff;
border: 1px solid #D1D1D1;
border-radius: 4px;
box-shadow: none;
box-sizing: border-box; }
/* Removes awkward default styles on some inputs for iOS */
input[type="email"],
input[type="number"],
input[type="search"],
input[type="text"],
input[type="tel"],
input[type="url"],
input[type="password"],
textarea {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none; }
textarea {
min-height: 65px;
padding-top: 6px;
padding-bottom: 6px; }
input[type="email"]:focus,
input[type="number"]:focus,
input[type="search"]:focus,
input[type="text"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
input[type="password"]:focus,
textarea:focus,
select:focus {
border: 1px solid #33C3F0;
outline: 0; }
label,
legend {
display: block;
margin-bottom: .5rem;
font-weight: 600; }
fieldset {
padding: 0;
border-width: 0; }
input[type="checkbox"],
input[type="radio"] {
display: inline; }
label > .label-body {
display: inline-block;
margin-left: .5rem;
font-weight: normal; }
/* Lists
–––––––––––––––––––––––––––––––––––––––––––––––––– */
ul {
list-style: circle inside; }
ol {
list-style: decimal inside; }
ol, ul {
padding-left: 0;
margin-top: 0; }
ul ul,
ul ol,
ol ol,
ol ul {
margin: 1.5rem 0 1.5rem 3rem;
font-size: 90%; }
li {
margin-bottom: 1rem; }
/* Code
–––––––––––––––––––––––––––––––––––––––––––––––––– */
code {
padding: .2rem .5rem;
margin: 0 .2rem;
font-size: 90%;
white-space: nowrap;
background: #F1F1F1;
border: 1px solid #E1E1E1;
border-radius: 4px; }
pre > code {
display: block;
padding: 1rem 1.5rem;
white-space: pre; }
/* Tables
–––––––––––––––––––––––––––––––––––––––––––––––––– */
th,
td {
padding: 12px 15px;
text-align: left;
border-bottom: 1px solid #E1E1E1; }
th:first-child,
td:first-child {
padding-left: 0; }
th:last-child,
td:last-child {
padding-right: 0; }
/* Spacing
–––––––––––––––––––––––––––––––––––––––––––––––––– */
button,
.button {
margin-bottom: 1rem; }
input,
textarea,
select,
fieldset {
margin-bottom: .75rem;
}
pre,
blockquote,
dl,
figure,
table,
p,
ul,
ol,
form {
margin-bottom: 1.25rem; }
.units {
min-width:90px; }
/* Utilities
–––––––––––––––––––––––––––––––––––––––––––––––––– */
.u-full-width {
width: 100%;
box-sizing: border-box; }
.u-max-full-width {
max-width: 100%;
box-sizing: border-box; }
.u-pull-right {
float: right; }
.u-pull-left {
float: left; }
/* Misc
–––––––––––––––––––––––––––––––––––––––––––––––––– */
hr {
margin-top: .75rem;
margin-bottom: .75rem;
border-width: 0;
border-top: 1px solid #E1E1E1; }
/* Clearing
–––––––––––––––––––––––––––––––––––––––––––––––––– */
/* Self Clearing Goodness */
.container:after,
.row:after,
.u-cf {
content: "";
display: table;
clear: both; }
/* Media Queries
–––––––––––––––––––––––––––––––––––––––––––––––––– */
/*
Note: The best way to structure the use of media queries is to create the queries
near the relevant code. For example, if you wanted to change the styles for buttons
on small devices, paste the mobile query code up in the buttons section and style it
there.
*/
/* Larger than mobile */
@media (min-width: 400px) {}
/* Larger than phablet (also point when grid becomes active) */
@media (min-width: 550px) {}
/* Larger than tablet */
@media (min-width: 750px) {}
/* Larger than desktop */
@media (min-width: 1000px) {}
/* Larger than Desktop HD */
@media (min-width: 1200px) {}
#usgsfooter {
margin-top: 15px;
font-size: 85%;
}
#usgsfooterbar {
/*background-color: #61639E;*/
background-color: #00264C;
padding: 4px;
margin: 0;
border-top: 3px solid #00264C;
}
#usgsfooterbar a:link, #usgsfooterbar a:visited {
margin-right: 40px;
color: #fff;
text-decoration: none;
font-weight:bold;
}
#usgsfooterbar a:hover {
margin-right: 40px;
color: #000;
text-decoration: underline;
}
#usgsfooterbar a:active {
margin-right: 40px;
color: #aaa;
text-decoration: none;
}
#usgsfootertext {
padding: 4px;
margin: 0;
color: #aaa;
}
#usgsfootertext a {
color: #777;
}
#usgsfootertext img {
border: none;
float: right;
margin-right: 5px;
}
</style>
<script type="text/javascript">
window.onload = function initialize(){
console.log("Initializing.");
document.getElementById("windspeed").defaultValue = "10.";
document.getElementById("fetch").defaultValue = "50000";
document.getElementById("waterdepth").defaultValue = "2.5";
recalc();
return true;
}
/** Hyperbolic tangent
* @param u (number) argument
* @return tanh(u) (number) result
* See <a href="refs.html">Beyer (1978)</a> p.252.
*/
function tanh( u ){
return( (Math.exp(u)-Math.exp(-u))/(Math.exp(u)+Math.exp(-u)) );
}
function fetch_limited(depth,fetch,u10){
/** FETCH_LIMITED Calculates fetch-limited waves in shallow water
* using 1984 Shore Protection Manual eqn. 3-39.
*
* Usage: hst = fetch_limited(depth,fetch,u10);
*
* @param depth (number) water depth (m)
* @param fetch (number) fetch (m)
* @param u10 (number) wind at 10 m height (m/s)
* @returns [ hs, tt ] (array of numbers)
* hst[0] hs = sig. wave height (m)
* hst[1] t = Period (s)
* Example: hst=fetch_limited(5,10000,20);
* calculates [hs,t] in 5 m water with 10 km fetch for 20 m/s winds
*/
var hst= [NaN,NaN];
var ua=0.71*Math.pow(u10,1.23);
var uasq=ua*ua;
var g=9.81;
var fact1=0.53*Math.pow(g*depth/uasq,0.75);
var fact2=0.00565*Math.pow(g*fetch/uasq ,0.50);
var hs=(uasq*(0.283)*tanh(fact1)*tanh(fact2/tanh(fact1)))/g;
var fact3=0.833*Math.pow(g*depth/uasq,0.375);
var fact4=0.0379*Math.pow(g*fetch/uasq,0.333);
var t=(ua*7.54*tanh(fact3)*tanh(fact4/tanh(fact3)))/g;
hst[0] = hs;
hst[1] = t;
//console.log("hst: ",hst[0]," ,",hst[1])
return hst;
}
function writeDate() {
document.write("<p>" + Date() + "</p>");
}
function recalc() {
var waterdepth = document.getElementById("waterdepth");
var windspeed = document.getElementById("windspeed");
var fetch = document.getElementById("fetch");
var h = parseFloat(waterdepth.value)*document.waterdepthUnitsConv.unitsFlag.value;
var u10 = parseFloat(windspeed.value)*document.windspeedUnitsConv.unitsFlag.value;
var fetch = parseFloat(fetch.value)*document.fetchUnitsConv.unitsFlag.value;
//console.log("h, u10, fetch:",h," ,",u10, fetch);
hstOut = fetch_limited( h, fetch, u10);
var hs = hstOut[0];
var t = hstOut[1];
console.log(hstOut);
hsOut.innerHTML = (hs/document.hsUnitsConv.unitsFlag.value).toFixed(3);
TOut.innerHTML = t.toFixed(3);
}
</script>
</head>