Benefit Evaluation of Environmental Interpretation and Aquatic Plants Carbon Fixation in Sinhai Artificial Wetlands
Date Issued
2011
Date
2011
Author(s)
Huang, Tah-Ken
Abstract
The objective of this research is to estimate carbon fixation of five dominate aquatic plants in Sinhai second phase artificial wetland in New Taipei City.Concering the analysis method, we used image based event identification and on site stratified random sampling to calculate area and density of aquatic plants in artificial wetland, and used high temperature combustion method to estimate organic matter content in aquatic plants.
The results showed that carbon fixation of five dominate aquatic plants in Sinhai second phase artificial wetland is : Phragmites communis 501.7 gC m-2 yr-1 , Typha angustata 135.6 gC m-2 yr-1 , Ipomoea reptans 82.3 gC m-2 yr-1, Brachiaria mutica 26.8 gC m-2 yr-1, Colocasia esculenta 22.2 gC m-2 yr-1 , Ludwigia x taiwanensis Peng 17.5 gC m-2 yr-1. Also, we found that aquatic plants carbon fixation are positive relative with leaf area index(LAI) and leaf area.Totally, carbon fixation of five dominate aquatic plants in Sinhai second phase artificial wetland is 211.0 gC m-2 yr-1. By means of image based event identification,We obtained the area of aquatic plants in Sinhai second phase artificial wetland is 35,652 m2, and that we can estimate the carbon fixation of aquatic plants in Sinhai second phase artificial wetland is 7.5 ton yr-1.
The objective of this research is to estimate ecological benefit in Sinhai second phase artificial wetland in New Taipei City. We use substitute market method to estimate benefit of aquatic plant carbon fixation. We also use travel cost method to estimate recreation economic value. Also, We analyze the influence of environment interpretation to recreation demand.
We found that the benefit of aquatic plant carbon fixation is 8,928 NTD/ yr. According to results of questionnaire survey, we found that environmental interpretation can increase the visitor’s revisit intention. There fore, by using wage rate 1/2 – 1/5 to estimate time cost, we can obtained the recreation benefit is per visitor 687.0 - 741.9 NTD/2 yr before environmental interpretation, and per visitor 1890.3 – 2471.8 NTD/yr after environmental interpretation.
Subjects
carbon fixation
artificial wetland
aquatic plants
image based event identification
stratified random sampling
ecological benefit
recreation benefit
environment interpretation
travel cost method
SDGs
Type
thesis
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