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地理科学  2013 

南方典型红壤水土流失区地表裸土动态变化分析——以福建省长汀县为例

, PP. 489-496

Keywords: 水土流失,裸土,遥感,特征信息提取,长汀县

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Abstract:

基于遥感数据和改进的双重指数法,从裸土面积、裸露强度和破碎度三方面研究了福建省长汀县1988~2010年的地表裸土时空变化。研究表明,该县近22a的水土流失治理已大大减轻了地表的裸露程度,地表裸土面积从175.5km2减少到86.6km2;地表裸露强度从0.487下降到0.383;裸土破碎度从0.103上升到0.207。在1988~1999年和1999~2010年的2个时间段里,裸土面积的变化呈现逐渐减少,减速加快的趋势,客观地反映了长汀县水土流失治理的重要扶持政策所产生的积极效应。

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