2006年四川盆地旱情及其对农业的影响评估

2006年四川盆地遭受了严重的春、夏、伏旱，伴随伏旱出现了持续的高温天气，农业损失惨重。本文分别选择春旱、夏旱、高温伏旱直接影响干旱程度的多个气象指标，采用主成分分析法确定各指标的权重，构建量化评估指数包括春旱指数、夏旱指数、伏旱指数和综合干旱指数，并据此对2006年的干旱程度进行评估。考虑到不同时期干旱对农业生产的影响不同，再次分配权重构建了农业综合评估干旱指数，并进行了分析。

Assessment of Drought and Its Effect on Agriculture in 2006 in Sichuan Basin

In 2006, heavy spring drought, summer drought and midsummer drought occurred in Sichuan Basin, and durative high temperature took place with midsummer drought, which made much loss of agriculture. Some meteorological indices which affected drought degrees of spring, summer and midsummer droughts were selected by principal component method to set up quantified evaluation indices, including spring drought index, summer drought index, midsummer drought index and comprehensive evaluation index. For different droughts had different influences on agriculture, the weights were redistributed to establish agricultural comprehensive evaluation index. All of drought indexes were analyzed.