Dear Seriba, Here is some ...

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Dear Seriba, Here is some additional info .. Pdf by US EPA. I feel your original question rather seems broad. You probably need to go a site specific requirement- I see you are located in Japan. Your target region / site in question is also in Japan? PDF. This is a thorough assessment of a constructed wetland. You see all the variables that are required to assess the wetland function - natural or not. Can be a useful source of data collection sample. http://water.epa.gov/type/wetlands/restore/upload/constructed-wetlands-design-manual.pdf