The Quantitative Study On The Spatial Pattern And Change Of Population-economy Pressure

The world's population and economic development have significant imbalances in the geographical distribution, the rich and poor gap between different regions and countries become increasingly evident, it has become one of the world's most high-profile socio-economic phenomenons. United Nations Department of Economic and Social Affairs spoke highly the enormous human development achievements in the 20th century and believed that population and economic development of a significant imbalance is a serious global problem as well. Population and economic relations is the core issue of the regional sustainable development, the coordinated development of population and economy is one of the general pursued objectives in different regions of the world, so it has long been highly concerned by the geography, economics and demography. Handle the relationship between population and economic development correctly will help to solve the population, economy, resources and environmental development issues. It is the premise of the regional economy in the good health of the population, environment, rapid and coordinated development.Population and economic coordinated development refers to coordinated operation between the two systems, each adapted to a reasonable proportion of relations. Population and economic development, whether or not to adapt, can be measured by the population-economy pressure. This paper aims at the internal economic contradictions and external factors on the impact of population-economy pressure, with the references domestic and foreign research scholars, establishs an evaluation index system to reflect the regional population-economy pressure, using principal component analysis method to calculate the population-economy pressure index of Gansu Province, using GIS re-classification method make quantitative analysis of the spatial pattern and its evolution of the population-economy pressure in Gansu Province, to provide references of the future population and resources, the environment, economic and social harmony sustainable development and other related research.The research results show that the spatial pattern of population-economy pressure of each county (city, district) in Gansu province has obvious geographical characteristics. It performs that the regions with more developed economies, better natural resources, slower population growth, high-quality population has smaller population-economy pressure, otherwise has greater population-economy pressure. From the point of view of time series, in 1985-2006, the population-economy pressures in the majority of counties (cities, districts) in Gansu Province have varying degrees of increase, the pressure brought by population of its own is a major factor and the slow economic development is also an important factor that can not be ignored. Counties (cities, districts) with smaller population-economy pressure mainly concentrated in Lanzhou city and Hexi region with the relatively good level of economic development and natural resource conditions. These areas are irrigated agriculture areas with relative abundance of Water, soil, light and heat resources, and new industrial areas with enrichment of the mineral resources and higher level of productivity, per capita share of resources and per capita standard of living. It has strong population and economic concentration ability, obvious economic advantages, strongpopulation carrying capacity, and coordinated development of the population and economy. Counties (cities, districts) with greater population-economy pressure mainly concentrated in south alpine wet area and semi-arid agricultural areas in Loess plateau. These areas have relatively low economic level, poor development condition, slow economic growth, rapid population growth, low per capita resources and per capita income, poor coordinated of population and economic development, and economic development lags behind population growth. In the future, these areas need to continue to control population growth and improve the quality of the population, at the same time, adjust economic structure, transform the mode of economic growth and improve the efficiency of resource use, then achieve coordinated and sustainable development of population and economy.