JOURNAL OF NATURAL RESOURCES ›› 2014, Vol. 29 ›› Issue (5): 744-756.doi: 10.11849/zrzyxb.2014.05.002

• Resources Utilization and Management • Previous Articles     Next Articles

Spatial Pattern Optimization Simulation of Coastal Wetland Use Based on BP Neural Network and Cellular Automata—A Case of Dafeng Coastal Wetland

OU Wei-xin1,2, XIAO Jin-cheng1, LI Wen-hao1   

  1. 1. College of Land Management, Nanjing Agricultural University, Nanjing 210095, China;
    2. National & Local Joint Engineering Research Center for Rural Land Resources Use and Consolidation, Nanjing 210095, China
  • Received:2013-04-11 Revised:2013-08-20 Online:2014-05-20 Published:2014-05-20
  • About author:10.11849/zrzyxb.2014.05.002

Abstract: In this paper, using BP neural network model and cellular automata (CA) model, 23 spatial variables including natural, economic and social aspects which drive the beach reclamation of coastal vegetation are selected and the spatial pattern simulation model of wetland is established by using MATLAB R2010b software. With remote sensing image of Landsat TM/ ETM+ in Dafeng, Yancheng coastal wetland in three periods of 1988, 2002 and 2009, and the population and economic data of the respective year and based on the simulation thought of optimizing pattern, firstly, we use the wetland function niche model to diagnose historical excessively exploiting areas. Then we train the conversion rules of CA model belonging to the rational development rule. Finally, we simulate the space optimization pattern of Dafeng coastal wetland in 2016. To improve operational efficiency and accuracy of the model, we use two new methods in this study. One method is based on the cover quantity structure in the target year, which limits the proportion of training samples randomly, so as to improve 10000 samples of the effective information amount. The second is through comparing with simulating accuracy under different hiding layer nodes of BP neural network,"23-13-8" and "23-17-8" are determined as the optimal BP structures in two experiments. These two improvements enhance the efficiency of simulation, and the overall accuracy is higher than 93.6%. This research shows that, during these years, the succession among the cover types of Dafeng coastal wetland tends to be frequent, and the speed of reclamational year of natural wetland is obviously faster. At the same time, the development focus is constantly moving eastward, which shows the characteristics of "rolling development" to the sea. Finally, it is recommended to slacken the disorderly development in the surrounding core areas of Jiangsu Yancheng National Nature Reserve and Dafeng Milu National Nature Reserve, and to promote the orderly reclamation of tidal flats near Dafeng Port.

CLC Number: 

  • F301.24