SCIENTIA GEOGRAPHICA SINICA ›› 2014, Vol. 34 ›› Issue (3): 365-369.doi: 10.13249/j.cnki.sgs.2014.03.365

• Orginal Article • Previous Articles     Next Articles

Oceanic Area Change and Contributing Factor of Jiaozhou Bay

Li-jie MA1(), Xi-guang YANG1,2, Ya-li QI1,2, Yan-xia LIU1, Jin-zhi ZHANG1,2   

  1. 1.Key Laboratory of Marine Geology and Environment,Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong 266071,China
    2.University of Chinese Academy of Sciences, Beijing, 100049, China
  • Received:2012-12-23 Revised:2013-02-01 Online:2014-03-10 Published:2014-03-10

Abstract:

Based on previous results, using the topographic map, nautical chart and remote sensing data, six different periods (1863, 1935, 1969, 1987, 2002 and 2012)coastline position of Jiaozhou Bay were extracted. Also, we calculated the area change of Jiaozhou Bay in these five periods and making chanegs of sea areas in differetn periods and land area distribution map of different development and utilization types according to the way of the development and utilization. It is showed that, in the past 150 years, oceanic area of Jiaozhou Bay decreased by 41% from 578.5 km2 in 1863 to 343.09 km2 in 2012. In past 70 years, oceanic area of Jiaozhou Bay reduces sharply, and the rates are 3.08 km2/a, 2.78 km2/a, 3.71 km2/a and 1.68 km2/a, respectively. Oceanic area change of Jiaozhou Bay is 129.2 km2 and is controlled entirely by natural factor before 1863. Between 1863 and 1935, oceanic area change of Jiaozhou Bay is 15.1 km2, and the main factor of area change is natural factor. Only 9.4% of the area change is due to human activities. In1935-1969, oceanic area change of Jiaozhou Bay is 104.78 km2, and the area change caused by human activities is 87%. In 1969-1987, oceanic area change of Jiaozhou Bay is 49.99 km2, and the area change caused by human activities is 89%. Between 1987 and 2002, Oceanic area change of Jiaozhou Bay is 55.62 km2, the area change due to human activities is 90%. Between 2002 and 2012, oceanic area change of Jiaozhou Bay is 16.76 km2, and 99% of the area are caused by human activities. In 1935-2012, 93.89% of area change is caused by human activities, which is the main controlling factor. The way of development and utilization, such as sea reclamation, result in the area of Jiaozhou Bay increase in1863-2012. The maximum appears in 1987 to 2012 and the maximal area is 27.67 km2. In 1987-2002, land reclamation reaches the maximum scale; in 1935-1969, area of saltern achieves the largest. The impact of this way of development and utilization is devastating and irreversible.

Key words: Jiaozhou Bay, oceanic area change, natural factor, human activities

CLC Number: 

  • P737.1