Identification of influencing factors on water footprint of winter wheat in Shanxi Province based on BP-DEMATEL
In response to the historical evolution of winter wheat water footprint in Shanxi Province and the identification of key influencing factors,the historical evolution law of winter wheat water footprint in Shanxi Province from 1993 to 2021 was analyzed.The key influencing factors of winter wheat water footprint evolution were identified using the BP nueural network-decision-making trial and evaluation laboratory(BP-DEMATEL)model,which was divided into driving factors and characteristic factors,and the mechanism of action between the influencing factors was revealed.The results show that from 1993 to 2021,the water footprint and yield water footprint of winter wheat in Shanxi Province showed a downward trend.In 2021,the total water footprint of winter wheat in Shanxi Province was2.7×108 m3(blue water accounted for 57％),with a unit water footprint of 1122m3/t.Compared to the previous high point,it has decreased by 38％(compared to 1994)and 21％(compared to 1993),respectively.Temperature,relative humidity,and irrigation area are key driving factors for the evolution of winter wheat water footprint,while fertilizer application and total power of agricultural machinery are key characteristic factors.
BP nueural network-decision-making trial and evaluation laboratory modelwater footprintwinter wheatShanxi Province
国家科技期刊平台
NSTL
万方数据
