摘要
通过研究选取预测的有害生物连片发生面积、可能造成的林木直接经济损失来确定林业有害生物预警等级,并将其划分为四级:特大等级(Ⅰ级,红色预警信号),重大等级(Ⅱ级,橙色预警信号),较大等级(Ⅲ级,黄色预警信号),一般等级(Ⅳ级,蓝色预警信号)。预警等级指标结果表明:可能造成的林木直接经济损失为300～10 000万元以上,预测的有害生物连片发生面积3 000～100 000 hm2以上,等比级差为3。
A study was conducted to determine the hierarchical index of forest pests for early warning by means of size of unbro- ken infested area and potential direct economic loss. The hierarchical index consists of four hierarchies, great watch （red early-warning signal）, severe watch （orange）, more watch （yellow） and ordinary watch （blue）. The size of unbroken in- fested area ranged from 3 000 to 100 000 hm2, and the potential direct economic loss from 3 million to 100 million yuan, with a geometric ratio of 3 between every two neighboring hierarchies.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2012年第2期103-105,共3页
Journal of Northeast Forestry University
基金
林业公益性行业科研专项(200804023)
关键词
林业有害生物
灾害预警
等级指标
Forest pests
Disaster early warning
Hierarchical indexes
