Abstract:

The method of window analysis was used to obtain the relief amplitude of Three Gorges Reservoir based on 1[DK]∶100，000 DEM Through mean changepoint analysis method，the optimal statistical unit of relief amplitude is determined as 015 km2 in the Three Gorges Reservoir It is the first time to draw the relief amplitude map of the Three Gorges Reservoir based on optimum statistical unit，and relief amplitude is identified as one of the important factors influencing the population distribution and the economic development in the Three Gorges Reservoir Based on analyzing the distribution of relief amplitude，four factors such as urbanization，Engels coefficient of rural residents，economic density and population density were chosen to reveal quantitatively how the relief amplitude influences the population and economic development The results show that the Three Gorges Reservoir Area was mainly covered by undulating mountains，accounting for 6383% of the total area The flat dam，platform and hills accounted for 3617% of the total area Through correlation analysis，it is found that the relief amplitude had a significant negative correlation to economic density and population density with a correlation coefficient of 0883  The relationship between relief amplitude，population and economic development was studied by mathematic modeling Through comparative analysis of different models and apparent test for parameters，the optimum models and the analysis results were as follows. The association between relief amplitude and population density was better modelled by logarithmic model Y=-30605ln（x）+17462 （R2 =07164） The association between relief amplitude and economic density was better modelled by exponential line Y=28202e-00156x （R2 =07460） There was a smaller population density，lower economic development level in the region with high relief amplitude，where rural residents lived in poverty relatively There was a higher population density，higer economic developement level in the region with low relief amplitude To some extent，relief amplitude restricted the development of regional economy，playing a significant impact on population distribution Correctly understanding the impact of relief amplitude on the spatial pattern of the mountain population and economic，scientifically mastering the quantitative relationship between relief amplitude and economic development，and moderately planning resource utilization and industry ditribution in relief amplitude range，would have important reference value and guidance significance to exert the regional advantage of the Three Gorges Reservoir area fully and promote regional economic benefit