Author: Charles E. Nordstrom
Publisher: Forgotten Books
ISBN: 9781396354076
Category : Science
Languages : en
Pages : 176
Book Description
Excerpt from Sand Level Changes on Torrey Pines Beach, California The principal objective of this study was to measure beach profiles along a straight beach with uncomplicated offshore bathymetry that is exposed to ocean waves from all offshore directions. Emphasis in this study was placed upon the accurate measurement of beach profiles in order to determine changes in profile configuration caused by wave action Profiles were measured from the beach backshore seaward to a depth of about 60 feet (18 m) at monthly intervals for a period of 23 months Additional measurements were made following storms and periods of high waves in order to document the extent of profile modification associated with these periodic events. Daily visual observations and measurements by pressure sensors provided a record of the waves incident to the beach during the duration of the study. Comparison of the profiles from month to month and seasonally was made to determine the erosional and deposi tional parts of the profile and the volumes of sand involved in onshore offshore transport. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Sand Level Changes on Torrey Pines Beach, California (Classic Reprint)
Author: Charles E. Nordstrom
Publisher: Forgotten Books
ISBN: 9781396354076
Category : Science
Languages : en
Pages : 176
Book Description
Excerpt from Sand Level Changes on Torrey Pines Beach, California The principal objective of this study was to measure beach profiles along a straight beach with uncomplicated offshore bathymetry that is exposed to ocean waves from all offshore directions. Emphasis in this study was placed upon the accurate measurement of beach profiles in order to determine changes in profile configuration caused by wave action Profiles were measured from the beach backshore seaward to a depth of about 60 feet (18 m) at monthly intervals for a period of 23 months Additional measurements were made following storms and periods of high waves in order to document the extent of profile modification associated with these periodic events. Daily visual observations and measurements by pressure sensors provided a record of the waves incident to the beach during the duration of the study. Comparison of the profiles from month to month and seasonally was made to determine the erosional and deposi tional parts of the profile and the volumes of sand involved in onshore offshore transport. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Publisher: Forgotten Books
ISBN: 9781396354076
Category : Science
Languages : en
Pages : 176
Book Description
Excerpt from Sand Level Changes on Torrey Pines Beach, California The principal objective of this study was to measure beach profiles along a straight beach with uncomplicated offshore bathymetry that is exposed to ocean waves from all offshore directions. Emphasis in this study was placed upon the accurate measurement of beach profiles in order to determine changes in profile configuration caused by wave action Profiles were measured from the beach backshore seaward to a depth of about 60 feet (18 m) at monthly intervals for a period of 23 months Additional measurements were made following storms and periods of high waves in order to document the extent of profile modification associated with these periodic events. Daily visual observations and measurements by pressure sensors provided a record of the waves incident to the beach during the duration of the study. Comparison of the profiles from month to month and seasonally was made to determine the erosional and deposi tional parts of the profile and the volumes of sand involved in onshore offshore transport. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Sand Level Changes on Torrey Pines Beach, California
Author: Charles E. Nordstrom
Publisher:
ISBN:
Category : Coast changes
Languages : en
Pages : 176
Book Description
Publisher:
ISBN:
Category : Coast changes
Languages : en
Pages : 176
Book Description
Sand Level Changes on Torrey Pines Beach, California
Author: Charles E. Nordstrom
Publisher:
ISBN:
Category : Coast changes
Languages : en
Pages : 166
Book Description
Publisher:
ISBN:
Category : Coast changes
Languages : en
Pages : 166
Book Description
Sand Level Changes on Torrey Pines Beach, California
Changes in Sand Level on the Beach and Shelf at La Jolla, California
Author: Douglas Lamar Inman
Publisher:
ISBN:
Category : Sand
Languages : en
Pages : 72
Book Description
Publisher:
ISBN:
Category : Sand
Languages : en
Pages : 72
Book Description
Seasonal Sand Level Changes on Southern California Beaches
Author: Marissa L. Yates
Publisher:
ISBN:
Category :
Languages : en
Pages : 133
Book Description
Seasonal airborne and ground-based observations of sand level changes were made along the coast of southern California from 2001 to 2008. Hourly, high alongshore spatial resolution wave estimates from a network of wave buoys and a spectral refraction wave model complement the sand level change data. Water returns from the ocean surface were removed from the airborne lidar elevation observations with a new method using tide and wave data, which was validated with concurrent in situ surveys. The resultant sand levels show high alongshore variability in seasonal shoreline position change along the 120-km survey region. Alongshore variability in wave energy, geologic factors, and sand grain size are hypothesized to control the alongshore variability of the seasonal shoreline change magnitude. Monthly or more frequent ground-based surveys at four selected focus sites show seasonal shoreline and bathymetry change, with winter shoreline erosion and offshore bar development, and summer shoreline accretion and the loss of the offshore bar. Analysis of surveys completed after a small beach nourishment at Torrey Pines Beach showed the presence of the nourishment through more than one full seasonal cycle. Observations from Torrey Pines Beach show the dependence of shoreline change on the initial shoreline position and the wave forcing. The observations motivated the development of an equilibrium shoreline change model, which accurately reproduces the observations with four free parameters. With at least two years of monthly surveys or multiple years of appropriately-timed biannual observations used to determine the free parameters, the model accurately predicts withheld observations and is applied at the additional survey sites. Ongoing work includes applying the model at additional locations and investigating the relationship between the tuned parameters and geologic factors.
Publisher:
ISBN:
Category :
Languages : en
Pages : 133
Book Description
Seasonal airborne and ground-based observations of sand level changes were made along the coast of southern California from 2001 to 2008. Hourly, high alongshore spatial resolution wave estimates from a network of wave buoys and a spectral refraction wave model complement the sand level change data. Water returns from the ocean surface were removed from the airborne lidar elevation observations with a new method using tide and wave data, which was validated with concurrent in situ surveys. The resultant sand levels show high alongshore variability in seasonal shoreline position change along the 120-km survey region. Alongshore variability in wave energy, geologic factors, and sand grain size are hypothesized to control the alongshore variability of the seasonal shoreline change magnitude. Monthly or more frequent ground-based surveys at four selected focus sites show seasonal shoreline and bathymetry change, with winter shoreline erosion and offshore bar development, and summer shoreline accretion and the loss of the offshore bar. Analysis of surveys completed after a small beach nourishment at Torrey Pines Beach showed the presence of the nourishment through more than one full seasonal cycle. Observations from Torrey Pines Beach show the dependence of shoreline change on the initial shoreline position and the wave forcing. The observations motivated the development of an equilibrium shoreline change model, which accurately reproduces the observations with four free parameters. With at least two years of monthly surveys or multiple years of appropriately-timed biannual observations used to determine the free parameters, the model accurately predicts withheld observations and is applied at the additional survey sites. Ongoing work includes applying the model at additional locations and investigating the relationship between the tuned parameters and geologic factors.
Changes in Sand Level on the Beach and Shelf at La Jolla, California
Changes in Sand Level on the Beach and Shelf at La Jolla, California
Effects of Beach Replenishment on the Nearshore Sand Fauna at Imperial Beach, California (Classic Reprint)
Author: Terence Parr
Publisher: Forgotten Books
ISBN: 9781390303063
Category : Science
Languages : en
Pages : 132
Book Description
Excerpt from Effects of Beach Replenishment on the Nearshore Sand Fauna at Imperial Beach, California Water temperature at Imperial Beach for all stations for each survey date. Calculated horizontal velocity of wave motion (meters per second) at the bottom for three-wave energies, three depths, and for three wave periods. Average number of samples needed to estimate abundance and species per sampling unit at precision levels of 50 and 30 percent at a 95 - percent confidence level. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Publisher: Forgotten Books
ISBN: 9781390303063
Category : Science
Languages : en
Pages : 132
Book Description
Excerpt from Effects of Beach Replenishment on the Nearshore Sand Fauna at Imperial Beach, California Water temperature at Imperial Beach for all stations for each survey date. Calculated horizontal velocity of wave motion (meters per second) at the bottom for three-wave energies, three depths, and for three wave periods. Average number of samples needed to estimate abundance and species per sampling unit at precision levels of 50 and 30 percent at a 95 - percent confidence level. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Guidelines for Predicting Maximum Nearshore Sand Level Changes on Unobstructed Beaches
Author: Allan E. DeWall
Publisher:
ISBN:
Category : Channels (Hydraulic engineering).
Languages : en
Pages : 52
Book Description
Publisher:
ISBN:
Category : Channels (Hydraulic engineering).
Languages : en
Pages : 52
Book Description