By means of analysing the historical data of flood-drought grade series in the past 2000 years(A.D.0-1900),especially in the last 5000 years (1470-1900) , this paper revealed the spatial-temporaldistribution features ...By means of analysing the historical data of flood-drought grade series in the past 2000 years(A.D.0-1900),especially in the last 5000 years (1470-1900) , this paper revealed the spatial-temporaldistribution features of severe flood and drought in Yellow River Valley. Statistical methods of varianceanalysis, probability transition and the principles of scale correspondence were employed tocomprehensively predicate 90's tendency of severe flood and drought in the Yellow River Valley. In addi-tion, this paper pointed out the possible breaching dikes, sectors and the flooding ranges by future's se-vere flood, meanwhile estimating the associated economic losses and impact to environment.展开更多
ThiS work was one of the key State-funded projects for natural sciences during the period from 1988-1992 under the joint sponsorship of the CAS,the State Planning Commission,the Institute of Geography and the Yellow R...ThiS work was one of the key State-funded projects for natural sciences during the period from 1988-1992 under the joint sponsorship of the CAS,the State Planning Commission,the Institute of Geography and the Yellow River Harnessing Committee under the Ministry of Water Conservancy.The project involves some 140 scientists from 19 research units,such as institutes and universities.Its purpose is to make clear the vicissitudes of environmental evolution and water-and-soil changes in the Yel-展开更多
The Peiligang culture(ca.7000–5000 cal BC)is the earliest Neolithic culture in the middle Yellow River valley and represents the emergence of cereal farming in the region[1].It has long been considered representative...The Peiligang culture(ca.7000–5000 cal BC)is the earliest Neolithic culture in the middle Yellow River valley and represents the emergence of cereal farming in the region[1].It has long been considered representative of millet farming[2],which requires a dry field,a certain amount of rainfall,and minimal crop management,but new records reveal that mixed farming of millet and rice(Oryza sp.)took place during this period[3].Therefore,it is possible展开更多
文摘By means of analysing the historical data of flood-drought grade series in the past 2000 years(A.D.0-1900),especially in the last 5000 years (1470-1900) , this paper revealed the spatial-temporaldistribution features of severe flood and drought in Yellow River Valley. Statistical methods of varianceanalysis, probability transition and the principles of scale correspondence were employed tocomprehensively predicate 90's tendency of severe flood and drought in the Yellow River Valley. In addi-tion, this paper pointed out the possible breaching dikes, sectors and the flooding ranges by future's se-vere flood, meanwhile estimating the associated economic losses and impact to environment.
文摘ThiS work was one of the key State-funded projects for natural sciences during the period from 1988-1992 under the joint sponsorship of the CAS,the State Planning Commission,the Institute of Geography and the Yellow River Harnessing Committee under the Ministry of Water Conservancy.The project involves some 140 scientists from 19 research units,such as institutes and universities.Its purpose is to make clear the vicissitudes of environmental evolution and water-and-soil changes in the Yel-
基金supported by the National Natural Science Foundation of China (41230104 and 41701233)the National Basic Research Program of China (2015CB953803)+1 种基金the China Postdoctoral Science Foundation (2016M601124)the ‘‘Macroevolutionary Processes and Paleoenvironments of Major Historical Biota” of the Chinese Academy of Sciences (XDPB05)
文摘The Peiligang culture(ca.7000–5000 cal BC)is the earliest Neolithic culture in the middle Yellow River valley and represents the emergence of cereal farming in the region[1].It has long been considered representative of millet farming[2],which requires a dry field,a certain amount of rainfall,and minimal crop management,but new records reveal that mixed farming of millet and rice(Oryza sp.)took place during this period[3].Therefore,it is possible
