Applied Mechanics and Materials Vols. 275-277

Abstract: Bridge construction can promote economic development, but if the bridge layout is unreasonable, it would hinder ship’s safety navigation in the bridge area. There is little reference for fairway width design about curved bridge channel in inland river navigation standards of China. The fairway conditions for ship safety navigation in bridge waters were discussed in this paper, and the mentioned determination methods for fairway dimension in bridge waters in this paper can provide some reference to solve other channel design problem.

Abstract: The development of waterway transport is supported strongly by China's inland navigation standards, but there are deficiencies in inland navigation standards. The inadequacies of China's inland navigation standards are analyzed in this paper, and suggestions for improving standards are put forward, this paper provides a reference to the amendment of inland navigation standards.

Abstract: Accidents happen easily in curved channel where flow pattern is very complex. The factors which affect accident’s happening in curved channel are analyzed; navigation reliability model is put forward and advices are given for improving navigation reliability in this paper.

Abstract: Subsurface drainage was known as an effective method to solve salinity problems, in this paper, two different subsurface drainage systems were designed to study how the system affect the surface soil EC(electric conductivity), besides, the economic benefits of the system were evaluated. Results showed that: under the drainage system, the surface soil EC was in a trend of fluctuant reduction, the desalination ratio of T1.1, T1.2, T2.1, T2.2 and CK was 13.5%, 11.2%, 14.8%, 12.6%, and 6.0% respectively; the surface soil EC would present an rising trend in an irrigation cycle on account of the evaporation and the groundwater level, compared with CK, the drainage treatments could better suppress the soil resalination; the calculation results of economic indexes proved that both T1 and T2 could gain favorable economic benefits, and T2 was preferable with higher EIRR (16.4%), ENPV (4536$/hm2) and EBCR (1.48). The results also suggest that the subsurface drainage system was practicable from ecological and economic angle.