Experimental Study on the Effect of Sediment Composition Ratio on Shallow Water Delta

Shallow water delta in the middle-newborn Stratum Widely developed with huge oil and gas in China (Hu Shengwu et al., 2013). The control factors on the delta development like Climate, sea level, tectonic subsidence ,sediment supply (flow, type), the geometric characteristics of the upstream river, the energy (wave, tide) of the storage basin and so on has many been studied, and made a wealth of research results. It is found that the distribution of sediments also has an important effect on the formation of delta (Douglas A. Edmonds et al., 2009). While the previous research on this side less, has not yet reached a unified understanding. In recent years, hydrodynamic numerical simulation has gradually become an important tool for the study of sedimentology, it has low cost and high efficiency (Petit, H, 2005). Delft3D is developed by the Netherlands Delft University of hydraulics software, is one of the international advanced water, sediment, water quality model. The general idea is to generate the depth of the grid and grid nodes on the file, through the corresponding module to calculate the corresponding water flow problem, according to the calculation result processing to get the data (Shen Hongwei, 2005). * Different from the general delta, shallow water delta with a shallow body, the topography is more gentle features. In this paper, the delta type discussed is defined as the shallow river delta in the continental shelf or the shallow river delta in the gentle slope of the depression, assuming that the climate, tectonic and sea level are invariable, the supply of delta sediments is a single river source, and not affected by the power source of the storage basin (waves and tides), based on the Delft3D numerical simulation software, the development and characteristics of shallow water delta under different