Quantificational research on eco-environmental water requirements for coastal wetlands in the Shantou demonstration site

Coastal wetland is the ecological sensitive region, and water is the most important factor either in the forming or in the growth of coastal wetland. Therefore, the study on eco-environmental water requirement of coastal wetlands is very important and imperative for wetland restoration. In this paper, the estimate methods and the amount of eco-environmental water requirement are studied in Shantou demonstration site. Based on the assessment indexes of the coastal wetland ecosystem health, the composition and the hierarchical division of eco-environmental water requirement are presented. In Shantou coastal wetland, the composition of eco-environmental water requirement can be divided into seven parts, which are the vegetation water requirement, soil water requirement, habitat water requirement, inland river water requirement, sediment transporting water requirement, salinity balance water requirement and contamination purification water requirement.

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