Study On Structure And Ecological Function Of Urban Green Space System In Harbin

This article investigated the structure and function of green space system of Harbin, after field investigation, statistic and collection of existing data based on the technology of RS and GIS. The relative theory and method of landscape ecology was used to study the urban heat island effect, quality of atmosphere, structure and function of green space system and systematically ecological effect field of urban green space.The urban heat island effect and quality of atmosphere were intensively focused on in the study of background of green space system in Harbin. The status of Harbin spatial pattern of thermal force field was analyzed and accessed from multi-angle, furthermore, the factors influencing thermal force field were analyzed and studied from the angle of green land covering rate, green land area and building dimension. Some advice was proposed eventually to establish ideal and realistic configuration of thermal radiation. According to large statistical data of atmosphere monitoring, the main type of air pollution in Harbin is coom and the pollution degree is heavy. At the same time, some index including the whole suspension granule, sulfur dioxide, dust dropping, nitrogen oxide were used to analyze the temporal and spatial dynamic of air pollution.The study of urban green space landscape structure involved spatial distribution of green patch, the spatial overlay of green space covering rate, area of green patch, land use type and landscape index based on the classification of green space area (<0.25 hm2, 0.25-0.5 hm2, 0.5-0.75 hm2, 0.75-1 hm2, 1~5hm2, 5-10 hm2, >10 hm2), green space covering rate (0~0.4, 0.4~0.7, 0.4~0.7), plantation structure (Tree+ShruhH-Herb, Tree+Shrub, Tree+Herb, Shrub+Herb, Tree, Shrub, Lawn), and the analysis of road corridor virescence. The result showed that the percent of green space area is about 30% in the all region and the decreasing order is as follow: Daowai, Nangang, Dongli, Taiping, Daoli, Xiangfang.The article applied the theory of ecosystem service, interface ecology, edge effects, ecological field to analysis and estimate ecological effect synthetically of patch and strip green space in improving microclimate from the angle of shadow, dropping temperature, increasing humidity, O2 emitting and CO2 fixing. The result described support the notion that the ecological function of patch green space is better than that of strip green-land in the same plantation structure and multistoried green space have better effects on environment than single layer in the two type greed-lands.Based on the theory of ecological field, the research of systematically ecological effect field put up in this paper have innovative characteristic including temperature, humidity, carbon dioxide gradient effect field in horizontal direction induced by the interaction between organism and environment different from traditional research whichemphasize inhibition and mutualism of organisms in simple natural plant communities. Results indicated that the basic character of systematically ecological effect field is material and boundary. It is suggested that around green space there exist a spatial gradient effect field and field intensity decreased from the center of green space to margin which different in the type of green spaces.