2008, Volume 10, Issue 6
Strategic Study of CAE >> 2008, Volume 10, Issue 6
Crop damage monitoring using remote sensing in January and February in South China in 2008
1. Institute of Remote Sensing Applications, CAS, Beijing 100101, China;
2. Twenty First Century Aerospace Co.Ltd, Beijing 100096, China;
3. Institute of Geodesy and Geophysics, CAS, Wuhan 430077, China;
4. Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, China;
5. College of Civil Engineering, Nanchang University, Nanchang 330031, China
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Abstract
The author monitored the crop damage using remote sensing combined with ground survey. First, the author extracted the snow disaster area using multi-phase BJ-1 multi-spectrum data and MODIS data. At same time, 3 ground teams were send to investigate the crop planting proportion and crop damage ratio. Then, crop damage area was calculated using arable area multiplied by crop planting proportion and crop damage ratio in this paper. The results showed that there were 429.76×104 hm2 crops were damaged in Jiangxi, Hubei, Hunan and Guizhou province. Ground survey showed that the main crop-damage area lied in winter wheat and seed rape planting area. The most serious area lied in high-elevate mountain area. For damaged crops, winter wheat was just affected a little because it was in greening stage, and seed rape was effected heavily for in flowing and jointing stage. In southern area of Jiangxi and Hunan province, crop damage area were very small because many cropland were in fallow.
Keywords
snow disaster ; crop damage ; remote sensing monitoring ; GVG sampling instrument
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