Download or read book Report on Beach Erosion Studies Tillamook Bay Oregon written by United States. Army. Corps of Engineers. Portland District and published by . This book was released on 1940 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Beach Erosion Studies Tillamook Bay Oregon with Reference to Bay Ocean written by United States. Army. Corps of Engineers. Portland District and published by . This book was released on 1940 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Shoreline Study written by United States. Army. Corps of Engineers and published by . This book was released on 1973 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Shoreline Study Inventory Report Columbia North Pacific Region Washington and Oregon written by United States. Army. Corps of Engineers. North Pacific Division and published by . This book was released on 1971 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1968, the 90th Congress authorized this national appraisal of shore erosion and shore protection. To satisfy the purposes of the authorizing legislation, a family of 12 related reports has been published. They are: Regional inventory reports; Shore protection guidelines; Shore management guidelines; and Report on the national shoreline study. This report presents an inventory of the physical characteristics, historical changes, and ownership and use of the coastal shorelines of Washington and Oregon, including major bays and estuaries.

Download or read book Tillamook Estuary Jetties and Dredging written by and published by . This book was released on 1976 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bayocean Spit Tillamook Oregon Early Economic Development and Erosion History written by Thomas A. Terich and published by . This book was released on 1973 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bayocean sand spit lies along the northern Oregon coast approximately 70 miles south of the Columbia River. Work was begun on the construction of a large recreational resort on the spit in the early 1900's. At the outset, the resort appeared to have a promising future. However, a three-year delay in the completion of the railroad to Tillamook created financial instability and lawsuits which continued up to the depression of the early 1930's. There soon followed severe erosion of Bayocean spit leading to its breaching in 1952 and forcing the abandonment of the deteriorated resort. The erosion appeared to have been initiated by the construction and subsequent lengthening of a north jetty to the Tillamook Bay channel. Rapid sand deposition north of the north jetty indicated that the structure had blocked a predominant north to south longshore sand transport, thus depriving the spit of sand and resulting in erosion. Similar occurrences have been documented at other coastal locations. However, analysis of historical shoreline changes and aerial photographs taken in 1971, 1972 and 1973 show that sand eroded from beaches to the north and to the south of the jetty has been transported and deposited immediately adjacent to both sides of the structure. This symmetrical pattern of erosion and deposition on both sides of the jetty indicates a reversing longshore sand transport with a nearzero net annual drift. The shoreline conditions at Bayocean demonstrate that beach erosion can result, from the construction of a jetty transverse to a seasonally reversing longshore sand transport with a near-zero net drift.

Download or read book Oregon Coastal Management Program written by Oregon. State Soil and Water Conservation Commission and published by . This book was released on 1978 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report summarizes the State Soil and Water Conservation Commission's examination of the Oregon Coastal Management Program's policies and procedures relating to the management of shoreline erosion"--Vol. 1, p. 1.

Download or read book Shoreline Changes Due to Jetty Construction on the Oregon Coast written by J. R. Lizarraga-Arciniega and published by . This book was released on 1975 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Patterns of beach erosion and accretion due to jetty construction are examined for the coast of Oregon. All jetty systems are included with the exception of those on the Columbia River, making a total of nine systems. All evidence indicates that these areas of the Oregon coast are experiencing a seasonal reversal in the sand drift, but with a zero or near zero net drift over a several years time span. Thus, shoreline changes resulting from jetty construction are not the usual examples of jetties blocking a net drift as found in southern California and elsewhere. In general, accretion of the shoreline took place adjacent to the jetties following their construction, both to the north and south. This accretion resulted mainly from the embayment formed between the jetty and the pre-jetty shoreline, the embayment becoming filled until the shoreline is straight and again in equilibrium with the waves such that there is a zero net sand drift. In some cases, as at the entrance to Yaquina Bay, the jetties are oblique to the trend of the shoreline and so produced a protected zone from the waves where accretion could occur. Sand for the accretion adjacent to the jetties was derived from beach erosion at greater distances from the jetties. The severity of the erosion depended on the total amount of sand required for the beach accretion to a new equilibrium, and the length of beach that was undergoing erosion. When only a short stretch of beach occurs to one side of the jetties, as at Bayocean Spit, then the resulting erosion was particularly severe, in that case leading to the breaching of the spit. A computer model is developed to simulate the shoreline changes that occurred following construction of the jetties on the Siuslaw River mouth. The model demonstrates deposition next to the jetty to fill the embayment created by the jetty, and erosion at greater distances from the jetty. The shoreline advances of the model agreed closely with the actual shoreline changes found in surveys following jetty construction.

Download or read book California regional inventory Inventory report Columbia North Pacific region Washington and Oregon written by United States. Army. Office of the Chief of Engineers and published by . This book was released on 1973 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Coastal Erosion Hazard Zones Along Dune and Bluff Backed Shorelines in Tillamook County Oregon written by Jonathan C. Allan and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tillamook Bay and Bar Oregon written by United States. Army. Corps of Engineers and published by . This book was released on 1954 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proposed Modification of the Tillamook Bay and Bar Project Tillamook Oregon written by Tillamook Bay Task Force (Or.). and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Tillamook Bay Task Force is requesting that the resolution adopted by the U.S. Senate Committee on Public Works on May 6, 1969 be amended to give the Corps of Engineers authority to conduct a comprehensive multi-purpose study of water utilization in the Tillamook Estuary including, but not limited to, navigation, flood control, restoration, fisheries, water quality, beach erosion and recreation. -- Introduction, p. 1.

Download or read book Report written by United States. Army. Office of the Chief of Engineers and published by . This book was released on 1939 with total page 1272 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wave Conditions and Beach Erosion on the Oregon Coast written by Paul D. Komar and published by . This book was released on 1976 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamic Revetments for Coastal Erosion in Oregon written by Jonathan C. Allan and published by . This book was released on 2005 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book GITI Report written by United States. Army. Corps of Engineers and published by . This book was released on 1975 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Some Recent Physical Changes of the Oregon Coast written by Samuel Newton Dicken and published by . This book was released on 1961 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some of the physical changes of the Oregon coast (from the California boundary to the Columbia River) which have occurred since settlement are discussed. Included are changes of the beaches and the immediate backshore, of the active dunes near the shore, and of the estuaries. Some discussion is of a more general nature, to place the specific studies in the proper perspective. The time span, arbitrarily chosen, is the period since white settlement, a little more than a century. This is the time for which historical records are available to document the nature of the changes. The purpose is to describe, measure, and explain some of the Oregon coast changes within the limitations of time and resources available. Special emphasis is placed on the beaches, dunes, and tidal marshes in the estuaries, where changes have occurred and are occurring. Many aspects of these three categories and many lines of investigation had to be left unstudied. (Author).