Author(s)

B. Tansel

Abstract

Much of the world’s open coasts are formed by estuaries and lagoons which are highly important for ecological reasons. Since the rich organic materials are carried in by the stream water, a favorable environment gets formed for plankton, the other creatures thriving on planktons and the fish feeding on them. On the other hand, the water, the reeds and other vegetation, the fish and the organic material that has settled provide the birds with an ideal environment. In this context, the problems with pollution in lagoon systems are important risk factors for the ecological balance. The purpose of the study is to generate a high quality computational network for the risk analysis of a special lagoon in order to construct a solid foundation for the next step in our study. A reduction of the number of elements is aimed at while the underlying physical domain is adequately represented via several grid refinement criteria. Furthermore, standardizing the method to be used as the calculation network, and utilizing its highly accurate risk predictions for all lagoon systems are also aimed at. Keywords: lagoon quality, risk analyses, grid generation. 1 Introduction Istanbul, one of the largest and crowded metropolitan cities of Turkey, affects coastal fields negatively in terms of city development, as is the case in many examples throughout the world. We performed our study for the Tuzla Kamil Abdus Lagoon (TKAL) in the Tuzla District of Istanbul. Although the fishery and the hosted birds were important ecological elements and also sources of income before the 1970's in the region, it was completely dried out in 2001 as a result of the relocation of the shipyards in this region (which blocked the natural opening of the lagoon), the highway construction, the modified paths of rivers,

Keywords

lagoon quality, risk analyses, grid generation