Analysis and scenario prediction of multi - year blue carbon in intertidal wetland on the south bank of Hangzhou Bay
WANG Shan-shan1, XU Ming-wei2, HAN Yu1, CAO Gong-ping1, HUANG Hui-ming2
1. Zhejiang Institute of Hydraulics & Estuary (Zhejiang Institute of Marine Planning and Design), Hangzhou 310020, China; 2. College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210024, China
Abstract：his study was based on the remote sensing images of the south bank of Hangzhou Bay. We used ENVI and ArcGIS for spatial correction and processing of these images and obtained the coastal wetland datasets. InVEST model was performed to analyze the change of blue carbon of intertidal wetland and its evaluation during the past 15 years on the south bank of Hangzhou Bay. The results showed that (1) From 2003 to 2017, there were escalating trends for total carbon storage and maximum carbon storage per unit area, the total carbon storage increased from 22 million tons to 76 million tons, and the net carbon storage increased by 54.3 million tons. The maximum carbon storage per unit area increased from 451.27t/hm2 to 1775.42t/hm2. As a whole, the potential of wetland carbon sink was increased on the south bank of Hangzhou Bay. (2) From 2003 to 2017, there was no carbon lass, and the overall performance was carbon accumulation on the south bank of Hangzhou Bay. The total amount of blue carbon was 54 million tons, and the maximum net carbon fixation per unit area was 1324.12t/hm2. (3) From 2003 to 2017, the total value of blue carbon was 476.13 billion yuan on the south bank of Hangzhou Bay, and the maximum value of blue carbon per unit area was 1.488 million yuan, which was a considerable ecological value. (4) As the storage of blue carbon in the intertidal is closely related to the vegetation type, Phragmites australis plays the most prominent role in improving the carbon sequestration capacity because it’s the dominant species on the south bank of Hangzhou Bay. (5) Under the preset scenario of returning aquaculture ponds to wetlands, it is predicted that the carbon sequestration and blue carbon value will significantly increase on the south bank of Hangzhou Bay by 2030.
王珊珊, 徐明伟, 韩宇, 曹公平, 黄惠明. 杭州湾南岸滩涂湿地多年蓝碳分析及情景预测[J]. 中国环境科学, 2022, 42(9): 4380-4388.
WANG Shan-shan, XU Ming-wei, HAN Yu, CAO Gong-ping, HUANG Hui-ming. Analysis and scenario prediction of multi - year blue carbon in intertidal wetland on the south bank of Hangzhou Bay. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(9): 4380-4388.
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