Dynamic Change Analysis of Urban Green Land in Jinan City Based RS and Geo-information Tupu

The three-period (1995, 1998 and 2003) remote sensing images in Jinan City, China are selected. And the information of green land, construction land, woodland and water body is extracted by using the image processing module of remote-sensing software and computerized interpretation module. Both the change table and transfer matrix table of land use area are analyzed by modeling module of remote-sensing software. Then, the Geo-information Tupu is obtained; and the temporal and spatial variation of land use in Jinan City is monitored and analyzed by Geo-information Tupu and transfer matrix. Result shows that land use structure change of Jinan City in the years 1995-1998 shows a transformation from green land to construction land. Area of green land circulating into construction land reaches 62.27 square kilometers, accounting for 25.84% of the initial green land. In the year 1998, areas of woodland and green land are reduced due to the urban expansion of Jinan City. However, with the enhancement of people's awareness of environmental protection, areas of woodland and green land gradually increase in the year 2003, which are still less than those in the year 1995.

Seasonal dynamics and impact factors of urban forest CO2 concentration in Harbin,China

CO2 concentrations in different plant communities （larch, birch, lilac, and grassland） were measured during the growing season in the Heilongjiang Forest Botanical Garden to study diurnal variation, seasonal and annual dynamics and factors that impact CO2 concentration in different spaces. CO2 concentration in different communities in green lands had an obvious diurnal variation, chronically decreasing, and temperature influenced the lilac area and the grassland. Seasonally, CO2 was lowest in the larch green land （344.03 ±23.03 μmol/mol） and highest in the grassland （360.13 ± 22.43 μmol/mol）. The overall trend in CO2 concentration was autumn 〉 spring 〉 summer; temperature is the main factor controlling variation in CO2 concentrations during the growing season; the CO2 concentration at the larch, birch, lilac, and grassland types of sites was negatively correlated with land surface temperature and air temperature, and the CO2 concentration at the larch and birch sites was positively correlated with atmospheric pressure. Without any obvious annual change law, further study and observation are needed.

休闲绿地活动空间设计

从"以人为本"的理念出发,通过对居住区中心绿地的道路、广场、植物、建筑的空间分析,提出活动空间设计方法和有关对策。

Study on the Layout of Urban Planning in Rapid Urbanization Areas under the Background of Air Pollution

China＇s urbanization has been over the medium-term process,which has made great achievements,but also triggered a huge problem of air pollution. Air pollution has become a big problem after the water pollution in China,and a serious threat to people＇s life and health. Under the background of ＂ the construction of beautiful China＂ and rapid urbanization,how to build a beautiful home has become the focus of attention. Taking Shenyang as an example,the author contrastively analyses the spatial distribution of the main air pollutants（ PM10,PM2. 5,and SO2） and the present situation of land use,and thus finds out the rules between pollutants distribution and land use. Then combining the urban planning scheme and the rules obtained above,reasonable suggestions are proposed for the scheme to improve the air quality,and reduce or avoid air pollution,and providing the basis for the construction of a piece of blue sky. The conclusions are as follows： 1 air pollutants concentration above Light Oil Gas Making Factory in south vice city of Shenyang reaches the peak value,and industrial point source is the main air pollutants emission source; 2 pollutants concentration above greenbelt is the lowest; 3 the overall spatial structure of urban planning can insulate the industrial agglomeration areas to some extent; greenbelt planning covers 40%- 50% of the area with high concentration of air pollutants,and it is suggested to achieve full coverage; traffic planning can achieve shunt most of the pollutants in many regions,but it can also expand the scope of pollutants in some certain regions,in such regions,it should reduce the road density.

Ecological compensation mechanism for urban green land and its application in Shanghai, China

Urban green land compensation plays an impor-tant role in county development,ecological environment management and many other fields.The concept,methods and principles of urban green land are introduced in this paper.According to the pay fee method,the value and ecological function of various types of urban green land were analyzed.The cost-benefit analysis method(CBAM)was used to estimate different external diseconomy benefits caused by green land loss.The authors applied CBAM to estimate such benefits in the case of Shanghai,China,and calculated the actual compensation value for green land.Results indicated that in 2002,the compensation value for the green land of Shanghai was RMB 8.58×10^(5) Yuan/hm^(2).

Research on Spatio-Temporal Differentiation Characteristics of the Construction Level of Green and Plaza Land in China

Green and plaza land(GPL)is one of the basic elements of urban construction,and is also the most basic public space to meet the needs of citizens for a better life.The exploration on its internal development laws can provide theoretical foundations for the planning of GPL and creating good human settlements.Taking 612 cities in China as the study area and from the"people-land"perspective,this paper selects the total GPL area,the per capita GPL area,and the land use proportion of per capita GPL as indicators to analyze the spatio-temporal differentiation characteristics and evolution rules of the construction level of GPL in China from 1996 to 2016,by using mathematical statistics and spatial analysis methods.The result shows:(1)from a national perspective,the construction level of GPL in China has been rapidly improved along with the temporal evolution,but there is still a big gap from the upper limit of the standard.In terms of the spatial distribution,regional differences have always been great,and the cities scoring below the standard are concentrated in the eastern and central regions,while high-scoring cities are more concentrated in the western region;the distribution of the land use proportion of per capita GPL is in a pattern that the eastern region has the highest proportion,followed by the western region,central region,and northeastern region successively.(2)From the perspective of scale,differences between cities of different sizes exist over a long period of time,and there is an obvious imbalance in the per capita GPL area as well as the land use proportion of per capita GPL between different cities.The construction level shows that small cities have the highest level,followed by medium-sized cities and then large cities.

Turn the Yellow Land Green

2011 International Horticultural Exposition to be held in Xi’an from April 28 2011 International Horticultural Exposition(IHE)is coming to Xi’an,capital city of northwest China’s Shaanxi Province.The IHE was last held in Shenyang,northeast China’s Liaoning Province,in 2006.The expo will showcase new achievements and new products in the areas of landscaping, horticultur plants and flowers,