Based on these data, a hazard zonation map of mountain torrents in Heilongjiang Province is provided.
在此基础上，得出了黑龙江省山洪危险度分布图。
The efficiency and veracity of landslide and debris flow hazard zonation have greatly been improved by the use of GIS technology.
随着GIS技术的引入，滑坡、泥石流灾害危险性区划的效率和准确性得以大大提高。
How to decide the threshold value of hazard zonation is the keys, which can be, divide the precision of landslide hazard zonation research.
危险度等级的阈值确定是确定滑坡危险度区划工作精度的关键。
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