西北师范大学学报(自然科学版)
西北師範大學學報(自然科學版)
서북사범대학학보(자연과학판)
JOURNAL OF NORTHWEST NORMAL UNIVERSITY(NATURAL SCIENCE)
2014年
4期
90-97
,共8页
李永梅%张立根%张学俭%梁勤欧
李永梅%張立根%張學儉%樑勤歐
리영매%장립근%장학검%량근구
城区扩展%驱动力%遥感%主成分分析%杭州市
城區擴展%驅動力%遙感%主成分分析%杭州市
성구확전%구동력%요감%주성분분석%항주시
urban expansion%driving force%remote sensing%principal component analysis%Hangzhou City
以杭州市城区为研究对象,以1984年、1994年和2005年3期 MSS/TM 遥感影像为数据源,利用遥感技术获取杭州市城区扩展信息,从扩展形态、扩展趋势、扩展速度、扩展强度、动态度、人口-城市扩展指数等方面分析了城区扩展的时空变化特征,结合社会经济数据,构建主成分分析模型,探讨杭州市城区扩展的主要驱动力.结果表明,空间上,杭州市城区除西南方向外,其他方向均扩展显著;外形上,杭州市呈现扇形扩展为主,并伴有轴向延伸;未来向南和东北方向扩展迅速.规模强度上,1984-1994年城区扩展面积的年平均绝对增加值为6.58 km2,1994-2005年为9.67 km2,其扩展速度在加快;以杭州市区土地总面积为基准,其扩展强度变快.动态度和模式以上一时期的面积作为基准,其扩展速率变慢;人口-城市扩展指数表明杭州市城区扩展集约程度有所提高.利用主成分分析法归纳出经济增长、城区建设、人口增长、交通发展为杭州市城区扩展的重要驱动因子,4个因子对城区扩展的驱动作用逐年增强.
以杭州市城區為研究對象,以1984年、1994年和2005年3期 MSS/TM 遙感影像為數據源,利用遙感技術穫取杭州市城區擴展信息,從擴展形態、擴展趨勢、擴展速度、擴展彊度、動態度、人口-城市擴展指數等方麵分析瞭城區擴展的時空變化特徵,結閤社會經濟數據,構建主成分分析模型,探討杭州市城區擴展的主要驅動力.結果錶明,空間上,杭州市城區除西南方嚮外,其他方嚮均擴展顯著;外形上,杭州市呈現扇形擴展為主,併伴有軸嚮延伸;未來嚮南和東北方嚮擴展迅速.規模彊度上,1984-1994年城區擴展麵積的年平均絕對增加值為6.58 km2,1994-2005年為9.67 km2,其擴展速度在加快;以杭州市區土地總麵積為基準,其擴展彊度變快.動態度和模式以上一時期的麵積作為基準,其擴展速率變慢;人口-城市擴展指數錶明杭州市城區擴展集約程度有所提高.利用主成分分析法歸納齣經濟增長、城區建設、人口增長、交通髮展為杭州市城區擴展的重要驅動因子,4箇因子對城區擴展的驅動作用逐年增彊.
이항주시성구위연구대상,이1984년、1994년화2005년3기 MSS/TM 요감영상위수거원,이용요감기술획취항주시성구확전신식,종확전형태、확전추세、확전속도、확전강도、동태도、인구-성시확전지수등방면분석료성구확전적시공변화특정,결합사회경제수거,구건주성분분석모형,탐토항주시성구확전적주요구동력.결과표명,공간상,항주시성구제서남방향외,기타방향균확전현저;외형상,항주시정현선형확전위주,병반유축향연신;미래향남화동북방향확전신속.규모강도상,1984-1994년성구확전면적적년평균절대증가치위6.58 km2,1994-2005년위9.67 km2,기확전속도재가쾌;이항주시구토지총면적위기준,기확전강도변쾌.동태도화모식이상일시기적면적작위기준,기확전속솔변만;인구-성시확전지수표명항주시성구확전집약정도유소제고.이용주성분분석법귀납출경제증장、성구건설、인구증장、교통발전위항주시성구확전적중요구동인자,4개인자대성구확전적구동작용축년증강.
Urban boundary information of Hangzhou is extracted from land sat MSS (1984) and TM (1994 and 2005 ) images with supervised classification . Based on the urban growth form , trend , speed , intensity , dynamic attitude , the population-urban grow th index , etc , this paper analyzes the characteristics of urban spatial-temporal change in Hangzhou City , Zhejiang Province . Combined with social and economic statistical data , this paper further explores the driving factors of Hangzhou urban expansion by PCA model . The result shows that , in addition to the southwest direction of Hangzhou , other direction is remarkable expansion ; the appearance of Hangzhou urban belongs to “fan-shaped expansion” with “axial extension” . Future expansion towards Xiaoshan and Yuhang district will be rapid . Annual average absolute increase of urban expansion area is 6.58 km2 from 1984 to 1994 , and 9.67 km2 from 1995 to 2005 . Its expansion speed is accelerated ; if takes the total land area of Hangzhou urban as a benchmark , expansion intensity is faster . If takes the area of the former period as the benchmark , expansion rate is in slow down ; population-urban grow th index shows that Hangzhou urban expansion of intensive degree is increasing . The paper reduces 15 major social and economic factors which influence Hangzhou urban expansion to four comprehensive factors using PCA . That economic and industrial development is the first driving force , economic grow th is the most fundamental and important factor which cause Hangzhou urban expansion , the development of industries especially industrial structure change , to some extent , accelerates urban expansion . Urban basic construction is the second driving force , which is direct driving force leaded to urban expansion . The development of urban population is the third driving force , which is an original driver of Hangzhou urban expansion . Traffic development is the forth driving power , which has directionality role in Hangzhou urban expansion and influences the external form of Hangzhou urban . In addition , the result shows that their driving role in Hangzhou urban expansion has been enhanced each year by the analysis of the comprehensive score of the four comprehensive driving forces .