Quantitative Study On The Correlation Between Urban Green Space Rate And Green Coverage Rate

As the basic national geographic information,urban greening coverage rate and green space rate have become an important indicator in assessing the urban ecological construction of local governments.More and more attention has been paid by Party committees and governments at all levels.They have been making great efforts to promote the construction of ecological civilization and emphasize that green changes China.Urban green space,as the major research object of landscape architecture specialty,is an important and vital facility in cities.Currently,the two rates of built-up areas are counted separately by cities and counties(cities and districts).The lack of unified survey techniques and standards and the differences of statistical caliber resulted in the lack of objectivity and comparability of the two rates.In addition,the survey techniques are far from scientific,and part of the technical links cost a lot of manpower and material resources,along with the inaccuracy of the measurement.Therefore,it is more pertinent and persuasive to discuss the correlation between the two rates and statistical methods for guiding the construction of urban green space.Firstly,starting from the theoretical research and practice related to urban green space rate and green coverage rate at home and abroad,this paper summarizes the vacancies in the study of urban green space rate and green coverage rate and problems of statistical method of greening rate.Based on the current general remote sensing technology and visual interpretation,the knowledge of industry statistical standards,botany etc.is added.This paper defines the statistical rules and analyses the influencing factors of the research on the correlation between urban two rates.,which provides technical and theoretical support for the study and analysis of case cities.In the quantitative research stage of the case city,Rizhao City of Shandong Province is selected as the research object of this paper.By using the remote sensing,geographic information system and field research,the green space information of case cities is extracted.The correlation of the two rates in the built-up areas was analyzed from three levels from big to small: data statistics of the total difference between the two rates in the main urban area,classification and comparison of the difference between the two rates of urban eight types of construction land and a quantitative study on the difference between the land use rate of green land and square of type G and the land use rate of transportation facilities of type S.Then,the positive and negative correlations between the green belt,road green belt,roadside green belt in the urban road land of S1 type and water and pavement in the park green space of G1 type are studied.And the positive and negative influencing factors were sampled and compared quantitatively to analyze the main reasons for the difference between the two rates.Finally,based on the preliminary analysis and case study,the calculation formula and statistical method of urban greening rate based on urban greening coverage rate are proposed,and three cities of Shandong province are selected for verification.It is proved that there is a certain correlation between the urban greening coverage rate and the greening rate,the quantification formula of which has wide application value and operability in the investigation of urban greening status.