Coastal Reclamation Closure Development And Application Of Hydraulic Calculation Software

There are many people with relatively small land in our country. The resource of land is scarce and the plow land per person is less than one mou. With the development of economy, the increase of population and the growth of urbanization, the need for land is more and more great. Practice proves that reclamation is one of the best approaches to solve the tight question of land use and to expand the survive space.Generally reclamation engineering includes seawall, sluice and final closure. Seawall and sluice are the parts constructed in advance, while final closure is the last part in construction. The hydraulic condition during the final closure process is worse than that during any other processes. And with the compressing of the entrance, the hydraulic condition becomes badly, the drop height of entrance can reach 2 to 3 meter , the maximum velocity of flow even reaches 6 to 8 meter per second and flow condition also becomes complex. So according to the technology regulation of reclamation engineering, hydraulic calculation must be carried out in the design of final closure.This paper firstly introduces the progression and present situation of reclamation engineering, emphasizing on the features of present reclamation and on the experiences and theories of home and abroad; using Fortran perfects the hydraulic calculation program of the closure and makes the program to meet different conditions (such as considering flood, the variation of time interval, multi-entrance, multi-reservoir capacity), and after comparing and analyzing a great deal of schemes, the reasonable computation scheme was brought up; the interface of the program was carried out by the programming language VB to make the process of calculation become easier and more distinct, so the result can be analyzed and handled more directly; VB is used in the later management of the result to plot the graphic chart of the isoline of the maximum of hydraulic element(the velocity of flow, the drop height and the rate of flow) automatically ; finally it was applied in the reclamation project of Dongbidao of Fuqing.