1) drought levels
旱灾等级
2) droughts graduation
旱灾分级
3) drought-resistance grades
抗旱等级
4) drought grades
干旱等级
1.
The percentage of precipitation anomalies and the drought grades(DG) were calculated by using the monthly mean precipitation data for the period of 1974-2006 from 614 stations in China.
利用中国614个气象台站1974~2006年历年月平均降水资料,计算各站的降水量距平百分率及其干旱等级序列,采用REOF等方法,对干旱等级序列进行气候分区,并分析各区域50 a左右干旱等级的时间演变特征。
5) Drought and flood grades
旱涝等级
1.
Based on the monthly precipitation data of 88 observing stations in Guangxi from 1961 to 2006,drought and flood grades in winter and autumn are divided with the method of Z index, and the annual change and spatial-temporal characteristics are obtained with EOF.
利用广西88个站点1961—2006年的逐月降水资料,采用Z指数定义方法,对秋季和冬季进行旱涝等级划分。
6) disaster grade
灾情等级
1.
The disaster grade of the floods was analyzed.
根据统计资料估算了1998年嫩江、松花江流域水灾的经济损失,并分析其灾情等
补充资料：干旱(见旱灾)
干旱(见旱灾)
ganhan干旱见旱灾。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条