旱涝灾害是导致农作物损失的主要因素，研究结果对旱涝趋势预测和防灾减灾具有参考作用。
The drought disaster was the major factor caused great loss of crops. This study provided a reference for the drought and flood forecast and disaster prevention and reduction.
利用WMO推荐的气候异常度指标，确定了气候条件（年景）的定量评价模式、旱涝等级标准及旱涝趋势预评价模式；
The quantitative assessment models of climate conditions were set according to a WMO's criterion of climate abnormal degree.
根据195 1 ~ 1999年黑龙江省代表站的历年逐月的气温、降水量资料，用计算趋势系数的方法，研究了东北北部冷暖旱涝趋势的问题。
The trends of temperature and precipitation in the north of the Northeast China are studied by using the trend coefficient based on the 1951 ~ 1999 data over 6 stations in Heilongjiang Province.
应用推荐