Architecture, Building and Planning - Theses

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End date: 1998 × Start date: 1998 × Type: PhD thesis × Subject: Aquaculture × Subject: Environmental management × Subject: Thailand ×

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    Management of coastal aquaculture in Thailand
    Jarayabhand, Srisuda ( 1998)
    Intensive shrimp farming r Thailand has developed significantly since the 1980s. The industry has played an important role in the Thai economy. However, the high profit from shrimp farming has driven the industry into unsustainable development. The indiscriminate and rapid expansion of shrimp farming has created many environmental problems, such as the destruction of mangrove forest, salt water intrusion, conflicts with other uses, water pollution and land abandonment. To solve these problems, the present study aimed to answer two questions. Firstly, how can we identify potential areas for developing shrimp farms as well as other types of aquaculture which minimize environmental problems and conflicts with other uses? Secondly, how can we calculate an upper Iimit to the area of shrimp farms to avoid creating adverse impacts on the receiving environment? Based on these questions, the main goal of this research was to initiate an appropriate planning approach to sustainable aquaculture. Two models were developed: a model for the assessment of suitability of sites using Geographic Information Systems (GIS) together with the Analytic Hierarchy Process (AHP); and a model for the assessment of carrying capacity. GIS was found to be a very useful tool for the first model. Although GIS alone cannot deal with the relative importance of factors, it provides a mechanism whereby weighting can be assigned, calculated and updated. The incorporation of AHP provides an effective method for dealing with complex situations involving many factors, such as aquaculture. The assessment of site suitability deals mainly with the problems on the landward side of the coastal zone, but not with the problems of the seaward impacts such as water pollution in the receiving water. Therefore, the assessment of the carrying capacity of the receiving environment was also needed to properly address the problems of coastal zone management. Although, both models need improvements in data acquisition and further research to improve the analysis methods, the integration of the two models provides the basis for a greatly improved method for making decisions about the development of sustainable aquaculture in the coastal zone.