Tidal Correction Based Intertidal Zone Changes Dataset of China

HAN Qianqian1NIU Zhenguo1

1 State key Laboratory of Remote Sensing Science，Aerospace information Insitute，Chinese Academy of Sciences，Beijing 100101，China

DOI:10.3974/geodb.2019.01.20.V1

Published:Jan. 2019

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Key Words：

intertidal zones,wetland remote sensing,tidal correction,China coastal zone,Chinese Science Bulletin

Abstract：

Intertidal zones are located in the transitional area of sea and land and are important to biodiversity protection, social and economic development, and global environmental changes. The Tidal Correction Based Intertidal Zone Changes Dataset of China (1995-2015) is developed by the integrating point based in situ observation data and Landsat TM (156 scenes) covering the entire coastal area of China in 1995 and 2015. The segments of China coast according to tidal station and extract each image’s shoreline of the two adjacent periods and calculates of slope of each shore segment were made. And then, the average high-tide and low-tide correction distances were simulated. The results indicated that: (1) In 2015, the total area of the intertidal zone in China was approximately14193 km², of which Fujian Province (19%) was the most distributed in the intertidal zone, followed by Liaoning Province (15%), Shandong Province (14%), Jiangsu Province (12%), and Guangdong Province (11%); the smallest area was distributed in Taiwan Province (2%). (2) From 1995 to 2015, the national intertidal zone area decreased by 1332 km², approximately 8.6%. The intertidal zone area of different provinces and cities showed different increasing and decreasing trends. The largest reduction of intertidal zones was in Zhejiang Province, with an area decrease of 1189 km². The intertidal zone area of Jiangsu Province was greatly reduced, by which its first position of having the most intertidal zone area of China in 1995 decreased to the fourth in 2015. The intertidal zones in Fujian Province exhibited the greatest increase, reaching 597 km². The dataset is vector data, stored in the .shp format, consisting of two folders, the intertidal zone of the year of 1995 and the intertidal zone of the year of 2015. Each file is named according to the path and row number, and the dataset is archived in .shp data format and in 1036 data files with data size of 34.1 MB (compressed to one single file with data size of 13.3 MB).

Foundation Item：

Chinese Academy of Sciences (XDA19030203); National Natural Science Foundation of China (41271423)

Data Citation：

HAN Qianqian, NIU Zhenguo. Tidal Correction Based Intertidal Zone Changes Dataset of China[J/DB/OL]. Digital Journal of Global Change Data Repository, 2019. https://doi.org/10.3974/geodb.2019.01.20.V1.

HAN Qianqian, NIU Zhenguo. China intertidal zone dataset based on tidal correction [J]. Journal of Global Change Data & Discovery, 2019, 3(1): 42–47. DOI: 10.3974/geodp.2019.01.06.

Data Product: