| The data of Ganzhou land use changes are extracted from RS data of TM and ETM in 1987～2002.Based Arcinfo9.0 of GIS software platform,the paper constitutes the Tupu of land use changes and land arising /declining,analyzing spatiotemporal changes of land use in Ganzhou during 15 years.The result shows that great changes happened in Ganzhou from 1987 to 2002.The area of desertificated land,cultivated land and urban/traffic land is rising,among which,desertificated land produced from grass land,cultivated land and the rest unused land is the most,increased 6.18×104 hm2(60.2%).The secondary growing land,mainly formed by desertificated land and the rest unused land,is cultivated land,increasing by 1.8×104 hm2.The area of grassland,forest land,water land and the rest unused land showed downward trend.The most significant reduction of land use,which transferred to desertificated land and the rest unused land greatly,is grassland Tupu unit,shrinking by 3.74×104 hm2(50.92%).The secondary declining land is the rest unused land,substituted by desertificated land and cultivated land. |