jgg     2013 33 (增1):  136-139    ISSN: 0412-1961  CN: 21-1139/TG EXTRACTION AND ANALYSIS OF ON LAND COVER CHANGE  INFORMATION OF BADONG SECTION OF THREE  GORGES RESERVOIR AREA 1) Key Laboratory of Earthquakes Geodesy, China Institute of Seismology,CEA, Wuhan 430071 2) Department of Information Engineering, China University of Geosciences (Wuhan),Wuhan 430074 Received: 2013-08-13  Revised: null  Online: 2013-09-25 Supporting info