PROGRESS IN GEOGRAPHY ›› 2011, Vol. 30 ›› Issue (5): 585-592.doi: 10.11820/dlkxjz.2011.05.010

• Original Articles • Previous Articles     Next Articles

Monitoring Wetland Changes in Yellow River Delta by Remote Sensing during 1976-2008

CHEN Jian,WANG Shiyan, MAO Zhanpo   

  1. China Institute ofWater Resources and Hydropower Research, Beijing 100038, China
  • Received:2010-07-01 Revised:2011-05-01 Online:2011-05-25 Published:2011-05-25

Abstract: Based on the landscape ecology principles, remote sensing (RS), geographical information systems (GIS) and other technical means, the remote sensing images of 1976, 1986, 2000 and 2008 are processed and analyzed. The results show that the total area of wetlands decreased by 8.5% in the modern Yellow River Delta from 1976 to 2008. The area of natural wetlands decreased by 44.5% from 1976 to 2008. The area of reed wetland decreased greatly too. From 1976 to 2008 , it decreased to 23.0% . On the contrary, the area of constructed wetlands increased significantly, and from 1976 to 2008 it increased by 70.7 times. The fractal dimensions of wetlands in 1976, 1986, 2000 and 2008 were 1.4636, 1.4858, 1.5046 and 1.4841, respectively. It means that the wetlands in the modern Yellow River dalta were greatly affected by human disturbance. The distribution centroid of reed wetlands has moved towards the estuary direction. It moved farthest from 1976 to 1986, followed by the period from 1986 to 2000. It was basically unchanged from 2000 to 2008.

Key words: distribution cenroid, fractal dimension, modern Yellow River Delta, wetland