【摘要】：地形起伏度是反映地形特征的重要指標(biāo),對(duì)人口空間分布有著重要影響.基于GIS/RS技術(shù),集成DMSP/OLS燈光數(shù)據(jù)、NDVI等多源遙感數(shù)據(jù)對(duì)沱江流域人口統(tǒng)計(jì)數(shù)據(jù)進(jìn)行了空間化,并從DEM中提取地形起伏度,通過定性和定量的分析方法,分析了人口密度與地形起伏度之間的關(guān)系.結(jié)果表明:人口空間分布值域介于496.67~9 896.4 km-2之間,其空間分布特征呈現(xiàn)出從城區(qū)中心向周圍逐漸遞減的態(tài)勢(shì),精度驗(yàn)證表明,人口空間分布具有一定的客觀性和精確性.地形起伏度值域介于0.229~7.054之間,且由北向南逐漸減小的空間分布態(tài)勢(shì).人口空間分布與地形起伏度的關(guān)系分析表明:兩者之間存在顯著負(fù)相關(guān)關(guān)系,其關(guān)系散點(diǎn)圖呈現(xiàn)"L"狀分布.當(dāng)?shù)匦纹鸱葹?.805時(shí),兩者關(guān)系出現(xiàn)拐點(diǎn),即地形起伏度大于0.805時(shí),人口空間分布陡然降低,單位面積內(nèi)人口數(shù)呈現(xiàn)平緩減少的空間分布態(tài)勢(shì).對(duì)地形起伏度進(jìn)行自然間斷點(diǎn)5級(jí)分類后發(fā)現(xiàn),地形起伏度前3級(jí)(0.229~0.509)的區(qū)域占全區(qū)總面積79.85%,分布著占全區(qū)88.23%的人口數(shù).
[Abstract]:Terrain fluctuation is an important index to reflect the terrain characteristics and has an important influence on the spatial distribution of population. Based on GIS/RS technology, integrated DMSP/OLS lighting data, NDVI and other multi-source remote sensing data, the population statistics of Tuojiang River Basin were spatialized, and the terrain fluctuation was extracted from DEM, and the qualitative and quantitative analysis method was adopted. The relationship between population density and terrain fluctuation is analyzed. The results show that the spatial distribution range of population is between 496.67 and 9 896.4 km-2, and the spatial distribution characteristics of the population decrease gradually from the center of the city to the surrounding area. The spatial distribution of population has certain objectivity and accuracy. The range of terrain fluctuation is between 0.229 and 7.054, and the spatial distribution trend decreases gradually from north to south. The analysis of the relationship between the spatial distribution of population and the degree of terrain fluctuation shows that there is a significant negative correlation between the spatial distribution of population and the degree of terrain fluctuation. When the terrain fluctuation is 0.805, there is a turning point between the two, that is, when the terrain fluctuation is more than 0.805, the spatial distribution of the population decreases abruptly, and the number of population in the unit area shows a flat decreasing spatial distribution. On the basis of the classification of the degree of natural discontinuity, it is found that the area of the first three grades (0.229 ~ 0.509) accounts for 79.85% of the total area of the whole area, and the population of 88.23% of the total area is distributed.
【作者單位】： 內(nèi)江師范學(xué)院地理與資源科學(xué)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(41401235) 四川省教育廳基金(15ZB0275)
【分類號(hào)】：C922

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本文編號(hào)：2439532