The Health Evaluation Of Urban Park Of Baoding Main City Zone

This paper aims at the main city zone of Baoding and gives the health evaluation of its green park space. Learning from the ideological of forest ecosystem health evaluation and from the three aspects of dynamic, organizational structure and the soil condition, we have constructed a set of multistage syntheses evaluation system. Using method of scoring by specialist and factor analysis to confirm indexes and ensure the weight of them. Set up evaluation model, class the health indexes and give a health evaluation of green-land in the main urban areas of Baoding. The results show that:(l)According to the ecological environment situation of main city zone of Baoding, the article establishes health evaluation index system of urban green land in this area. In order to keep the stability and sustainability of green land system,We begin with activity, organization structure and soil condition and use diameter at breast height of trees, height of trees, timber, growth potential, coverage, natural degree of trees, biodiversity,soil PH and water-holding capacity, and the soil fertility as health evaluation indexes, and then it applies expert evaluation method and factor analysis to determine the weight of every index.(2)Inputting all of the data into the urban green land evaluation model which based on the method of exponential sum, it can get the healthy comprehensive index. The conclusions are as follows: the healthy comprehensive index of Jingxiu Park is between 4.39 to 7.69; the healthy comprehensive index of Botanical Garden is between 0.00 to 5.68; the healthy comprehensive index of Dongfeng Park is between 6.33 to 10.00; the healthy comprehensive index of Junxiao Park is between 4.58 to 7.25.(3)According to the classification of healthy comprehensive index, it can divide the urban green land of Baoding into morbid green land, unhealthy green land, sub-healthy Greenland, healthy green land four parts. Through calculation the results are as follows: Among 12 quadrates, there is 1 morbid green land, and it occupies 8.33%; there is 1 unhealthy green land, and it occupies 8.33%; there are 8 sub-healthy green lands, and it occupies 66.67%; there are 2 healthy green lands, and it occupies 16.67%.(4)The investigation result indicates that the situation of green land in main city zone of Baoding is between unhealthy and sub-health. According to unhealthy green land, it can find that the species diversity, thenatural degree of trees(the proportion of native tree species), coverage, the soil water-holding capacity, and the soil fertility are key factors which can affect the health of green land. Based on the conclusions, we can apply some methods to solve the problems: the area that species diversity, the natural degree and coverage are low should be reseed and improve the utilization rate of native tree species, the area which the soil condition is poor need strengthen the management of green space and the area which the landscape is poor should be increase investment on management and raise the level of park green space landscape planning and designing.