| 1998年吉林省西部洪水过程遥感动态监测与灾情评估 |
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| 引用本文： | 刘志明,晏明.1998年吉林省西部洪水过程遥感动态监测与灾情评估[J].自然灾害学报,2001,10(3):98-102. |
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| 作者姓名： | 刘志明 晏明 |
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| 作者单位： | 1. 中国科学院长春地理研究所,
2. 吉林省气象科学研究所, |
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| 基金项目： | 吉林省重点科技项目(1997-642-02) |
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| 摘 要： | 用NOAA卫星资料对1998年吉林省西部地区洪涝灾害进行了动态监测。并以农田损失为主对灾害情进行了评估。采用AVHRR通道1与通道2的比值图像突出水体信息，在直方图上人机交互划定水陆边界，用统计数学方法确定了混合像元中水体与非水体的阈值，利用灾区与当年的作物种植数作出农田受灾面积评估，用受灾前后的植被指数图，进行农田受灾程度划分，对象元面积的精确计算可以提高受灾面积的计算精度，区域像元数的统计分析可以减少区域内灾害面积比例分析的误差。
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| 关 键 词： | 遥感动态监测 灾情评估 洪水 1998年 吉林 农田损失 |
| 文章编号： | 1004-4574(2001)03-0098-05 |
RS motional monitoring and damage evaluation of flood process in western Jilin
Province in 1998 |
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| LIU Zhi-ming,YAN Ming,PANG Ge-jiang.RS motional monitoring and damage evaluation of flood process in western Jilin
Province in 1998[J].Journal of Natural Disasters,2001,10(3):98-102. |
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| Authors: | LIU Zhi-ming YAN Ming PANG Ge-jiang |
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| Institution: | LIU Zhi-ming1,2,YAN Ming2,PANG Ge-jiang2 |
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| Abstract: | flood disaster in the western Jilin Province in 1998 had been monitored by NOAA/AVHRR, its damages, mainly in field losses evaluated. The author projected water information by ratio images and of AVHRR channel 1 to channel 2, and delimited water-land boundaries on histograms with the thresholds value of water and non-water in mixed pixels using statistical method. Then the damagedfields area evaluation had been made with application of planting data in 1998, and damage degrees differentiated by vegetation index maps before and after the disaster. The error for damaged area ratio can be improved through pixel accurate statistical analysis. |
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| Keywords: | remote sensing motional monitoring damage evaluation flood 1998 |
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