Identification and evaluation of Tiandong county agricultural drought based on entropy weight method
Drought is a familiar natural phenomenon in China,and agricultural drought disaster has caused serious economic losses to the state and the people each year.To take preventive measures to reduce the impact of drought and water shortage,many scholars at home and abroad have committed to the identification and evalua-tion of agricultural drought research.In this study,index of water supply and demand balance,and relative index of water supply and demand based on average value method were used as entropy weight coefficient index to identify and evaluate the drought differences,drought's month and quarter transformation trends and drought de-gree in different agricultural regions of Tiandong county,which is located in South Asia tropical monsoon climate zone.The analysis and calculation results show that the entropy weight method for identification and evaluation of agricultural drought in dry lands are reasonable,and the evaluation results are more consistent with the drought actual situation.It is an effective and feasible method.