The Erosion And Deposition Evolution Development And The Protection In The East Coast Of LaiZhou

In recent years, the coast erosion has already become an important problem with global variety in 21 centuries. 70% sand coasts is suffering erosion in the world, there is also 70% erosion appearance in the delta and the plain coast in our country, especially the coast erosion turn worse trend in the last few years, the coast erosion resulted in the huge economy lose. The variety of the east coast of LaiZhou gulf directly influence the engineering address in the area's coast and service life, and contain important function to the economic development of the littoral region, especially, rising along with the sea level in the last few years and the development of the sand mineral resources which make the coast erosion turn worse, causing an extensive concern thus. Thorough research the sediment move regulation in the east coast of LaiZhou state gulf, analytical it erosion and Silt up regulation not only have important theories meaning, and have important of application value for coast erosion protection, can also provide decision basis for the port, channel, environment, the fishery management in the LaiZhou state gulf east coast region. to provide assurance for the economy development, have important count for academic meaning with physically applied value.This thesis will according to actually measure of the bottom quality type, ,the current wave data and water deep data, make use of wave and flow method ,adopt CERC formula to compute the sand rate first, analyze the sand variety of each shore in the east coast of LaiZhou state gulf ;Make use of many years map data and the Satellite date..etc. to analyze velocity ;Made use of again the gulf flat surface equilibrium appearance experience model-parabola model to predict the end LaiZhou . In the meantime Analyzed the erosion and deposit of the east coast of LaiZhou state surroundings waters; Announce to public coast erosion reason; End, take serious erosion region-ZhaoYuan shore segment for example, put forward six kinds of protection measure, imitate respectively six kinds of different Engineering condition 50 years a meet of current field, the wave field, and Merge the twos, Comparison the slice under the wave and Current with the Critical shear of the deposition thing, imitate under each work condition of erosion and deposit variety. Analyze it under six kinds of the different work condition can attain the result, give end suggestion project. And apply to the whole east coast of LaiZhou state gulf, provide science basis for the coast engineering design and protection.Analyze the Laizhou state gulf east coasts of the erosion and silt up evolve in the past 50 years:1958-1984, the Longkou gulf crest because of the artificial wharf etc. construct, the shore line change turns and twists complications. because of northern Qimu , the wave is small, basic have no sediment pass in and out. Suffered strong erosion in the coast of the Jiehe river mouth surroundings, 26 years Retreat 627 m, the eclipse rate as 24 m/a, recruiting to Zhaoyuan surroundings and the Shihuzui northeast , the shore segment to be placed in to silt up appearance, 26 years silt up 153 m,315 m .respectively. Silt up as 6 m/a rate,12 m/a. 1984-1991 years, in addition to Zhaoyuan shore segment and the Jiehe river mouth shore segment to suffer erosion far, the other shore segment don't greatly change. 1991-2006 years in addition to the Longkou crest outside, the other shore segments all suffer the erosion with different degree, among them the Zhaoyuan shore segment erosion the most severe, 16 years, the shore line retreats 380 m, with the velocity as 25 m/a.A static state balance appearance of the Laizhou gulf is: the Zhaoyuan will also retreat 228 m, the boundary river mouth retreat larger, is 678 m, the Shihuzui northeast segment will silt up 593 m. Other coasts line don't greatly change.Suggestion protection measure in coast of ZhaoYuan shore segment: The tour wharf 200 meter long+ fish tail type dam(150 m long) protection engineering in coast of the perpendicular shore line in the distance of 300 m places to tour wharf, design different dam length and distance between each dam. according to different erosion Circumstance. The coast's protection measure provide science basis for the coast engineering design and protection, developping the tour industry of that area in the meantime.