西安市人口分布模式初探

本文通过分析西安市区人口分布特征,发现其总趋势表现为:以新城广场为中心向四周递减。试以C·克拉克经验公式d=d₀e^-βx对1990、1982、1964年三次人口普查资料进行回归分析,分别得以下三式:
dx=50892.45e^-0.32924x
dx=51974.922e^-0.38286x
dx=55072.095e^-0.46977x
可是,从1964-1990年,市区中心的人口密度d逐渐下降,且人口密度梯度β亦随时间的推移而减缓,即市区人口分布逐渐趋向合理。

A Preliminary Study of the Model of Population Distribution in the City of Xi'an

Through analysed and compared the census datas of third times of 1990, 1982 and 1964's in Xian's 44 subdistrict offices, the populous peculiarity Will be got.
Ⅰ. The density of population was very great disparity. The distribution of population was disequilbrium.
Ⅱ. The general trend of the populous distribution was that is decreasing progressively around the centre of the New City Square.
Ⅲ. The density value of population was about 30 thousand per square kilo in the old city proper, and tend to rational gradually.
According to the Colin Clark's formula.
d=de₀^-βx
Through the statistical analysed the census datas of third times of 1990, 1982 and 1964's. We can got the following formula.
dx=50892.457e^-0.32924x
dx=51974.922e^-0.38286x
dx=55072.095e^-0.46979x
To compare with them, can discover:
A). In the centre of Xian, it's population density value (d₀) had reduced from 55072 per square kilo to 51974 per square kilo. Up to 1990, it had reduced to 50892 per square kilo. The reduction was notable.
B). The gradient of population density (b)is becomming alleviation while the time's going on and the dimesion's exploitating of the city.