基于作物旱度指标的农业干旱评价指标与模型研究

Agricultural Drought Evaluation Index and Model Research Based on Crop Drought Index

摘要: 在广泛研究国内外农业干旱指标的基础上,首次提出“作物旱度指标I”t、“作物相对旱度指标Ir”t、“作物干旱强度指标Di”建立了广元市农业干旱评价指标和模式。当作物相对旱度指标Ir20≧0.6持续15天时发布农业干旱预警,为防旱治旱提供决策依据。

Abstract: Based on the study of agricultural drought index,it gave “degree of crop drought index It”,“Dry relative degrees crop index Irt”,“Crop Drought intensity index Di”,it established the evaluation index and patterns of agricultural drought in Guangyuan.When crops relative drought index Ir20≧0.6 last for 15 days,agricultural drought issues warning,to provide decision-making basis for drought for the government.