Tidal Current Analysis Procedures and Associated Computer Programs

By Zervas, Chris

Book Id: WPLBN0000694510
Format Type: PDF eBook
File Size: 734.97 KB.
Reproduction Date: 2005

Title:	Tidal Current Analysis Procedures and Associated Computer Programs
Author:	Zervas, Chris
Volume:
Language:	English
Subject:	Science., Ecology & environment, National Oceanic and Atmospheric Administration (U.S.)
Collections:	National Oceanographic Data Center
Historic Publication Date:
Publisher:	Government Reference Publication


Citation APA MLA Chicago Zervas, C. (n.d.). Tidal Current Analysis Procedures and Associated Computer Programs. Retrieved from http://gutenberg.cc/

Excerpt
Introduction: The National Ocean Service (NOS) has been charged with producing tidal current tables for the coastal areas of the United States. Tidal currents are almost always the strongest current experienced by vessels operating offshore and for considerable distances inside of bays and river estuaries. Tidal currents are usually fastest where water level fluctuations on wide continental shelves are amplified as they approach the coast and water is forced through a narrow constricted channel into a large bay or estuary.

Table of Contents
TABLE OF CONTENTS 1. TIDAL CURRENT ANALYSIS PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2. Comparison of Tidal and Tidal Current Analysis . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.3. Calculation of Tidal Current Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4. Reference and Subordinate Stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.5. Tidal Current Analysis Procedure for All Stations . . . . . . . . . . . . . . . . . . . . . . . . 8 1.6. Tidal Current Analysis Procedure for Subordinate Stations . . . . . . . . . . . . . . . . . 11 2. LSQHA: THE LEAST SQUARES HARMONIC ANALYSIS PROGRAM . . . . . . . . . . . 13 2.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.2. Explanation of the Control File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2.3. Sample Control File for Multiple Deployments . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2.4. Output Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 3. HARM29 AND HARM15: THE FOURIER HARMONIC ANALYSIS PROGRAMS . . . 29 3.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 3.2. Explanation of the Control File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 3.3. Sample Control Files and Output Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4. PRED: THE TIDAL PREDICTION AND DETIDING PROGRAM . . . . . . . . . . . . . . . . . 39 4.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 4.2. Tidal Prediction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 4.3. Detiding a Time Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 5. GI AND GIPLOT: THE GREENWICH INTERVAL PROGRAMS . . . . . . . . . . . . . . . . . 51 5.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 5.2. Creating Plots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 6. REVRED: THE REVERSING REDUCTION PROGRAM . . . . . . . . . . . . . . . . . . . . . . . . 63 6.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 6.2. Input Parameters and Program Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 7. ROTARY: THE ROTARY REDUCTION PROGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 7.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 7.2. Program Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 7.3. Explanation of the Control File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 7.4. Sample Input and Output Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 8. UTILITY PROGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 8.1. Calculation of the Principal Current Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 8.2. Finding Gaps in a Time Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 8.3. Averaging Multiple Sets of Tidal Constituents . . . . . . . . . . . . . . . . . . . . . . . . . . . 91