Volume 39 Issue 3
Mar.  2014
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YUAN Lifeng, LIU Xingfei, WU Shufang, HUO Yunyun. Effection of Cellular Size Selection on Process Simulation of RillErosion on Loess Hillslopes Using CA Method[J]. Geomatics and Information Science of Wuhan University, 2014, 39(3): 311-316. DOI: 10.13203/j.whugis20120042
Citation: YUAN Lifeng, LIU Xingfei, WU Shufang, HUO Yunyun. Effection of Cellular Size Selection on Process Simulation of RillErosion on Loess Hillslopes Using CA Method[J]. Geomatics and Information Science of Wuhan University, 2014, 39(3): 311-316. DOI: 10.13203/j.whugis20120042
shu

Effection of Cellular Size Selection on Process Simulation of RillErosion on Loess Hillslopes Using CA Method

  • 1College of Geography & Biological Information,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;2Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China;3State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Water and Soil Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100,China;4Water and Architecture College,Northwest A&F University,Yangling 712100,China

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  • Author Bio:

    YUAN Lifeng,PhD,associate professor,specializes in analysis and simulation of earth surface processes,RS & GiS appli-cation in resources and environment.

  • Corresponding author:

    WU Shufang

  • Received Date: January 14, 2013
  • Revised Date: March 04, 2014
  • Published Date: March 04, 2014
    Graphical Abstract
    • Abstract
  • Objective Based on the CA model of rill erosion,the research was focused on the effect of different si-zes of cells on the process and characteristic parameters of rill erosion on loess hillslopes as well as theavailability of a CA model through the Nash-Sutcliffe coefficient Ensand error coefficient Refor cumu-lative runoff and erosion.The results show:when other parameters of model and the running time areunchanged,if the size of cell becomes bigger,the process of rill erosion will accelerate,the averagewidth of the rill will get wider,the length will get longer,the trend of runoff and erosion will ad-vance,and at the same time,the cumulative runoff will decrease and the cumulative erosion will in-crease.If the size of cell becomes smaller,the effects will be reversed.In addition,the velocity of theCA model depends on the ratio of cell length and time step and the effectiveness of the model can beimproved when it is closed to overland flow velocity.
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