基于GIS的城市绿化生态服务量及其均等化评价

发布时间：2018-03-31 11:03

本文选题：城市绿化　切入点：生态服务功能　出处：《生态环境学报》2017年04期

【摘要】：城市绿地是城市生态系统重要的组成部分,具有重要的生态服务功能,为了客观科学地评价城市绿地的绿化效果和生态服务均等化水平,以天津市滨海新区汉沽区河西区块为例,采用生态绿量测度城市绿化的生态服务量,以GIS作为城市绿化生态服务量的分析工具,并结合距离衰减模型及源叠加模型,计算不同斑块所承接到的不同绿化源的生态绿量;构建可视化系统,展现各斑块生态绿量的空间分布情况。结果显示,从整体水平看,研究区生态绿化建设效果良好,大部分斑块达到了生态绿量的基准线51.848,只有西南角部分斑块没有达标。从分布情况来看,研究区生态绿量分布并不均匀,表现为同一纬度上东部比西部生态绿量的接收量高,且呈现由东到西逐步递减的趋势;而同一经度上北部比南部生态绿量的接收量高,呈现由北到南逐步递减的趋势。其中,研究区东北区块与西南区块的接收量差距最大,斑块接收的生态绿量最大值为161,最小值仅为46,均等化水平较低。应用文中的研究方法可以精准找出城市绿化生态服务较为薄弱的斑块,对城市绿地系统规划具有一定的参考价值。
[Abstract]:Urban green space is an important part of urban ecosystem and has important ecological service function. In order to evaluate the greening effect of urban green space and the level of equalization of ecological services objectively and scientifically, Taking Hangu block of Hangu District, Binhai New District, Tianjin as an example, ecological green quantity is used to measure the ecological service quantity of urban greening, GIS is used as the analysis tool of urban greening ecological service quantity, and the distance attenuation model and source superposition model are combined. The ecological green quantity of different patches was calculated, and the visualization system was constructed to show the spatial distribution of the ecological green amount of different patches. The results showed that the ecological greening construction effect of the study area was good from the overall level. Most of the patches reached the baseline of 51.848, and only some patches in the southwest corner did not reach the standard. From the distribution, the distribution of ecological green in the study area was not uniform, showing that the eastern part of the study area received more ecological green than the western one at the same latitude. In the same longitude, the ecological green quantity in the north is higher than that in the south, and the trend is decreasing gradually from north to south. Among them, the gap between the northeast block and the southwest block in the study area is the biggest. The maximum value of ecological green quantity is 161, the minimum value is only 46, and the level of equalization is low. It has certain reference value to the planning of urban green space system.
【作者单位】：天津工业大学环境经济研究所;河北环境工程学院;
【基金】：天津市哲学社会科学规划课题(TJLJ15-008) 天津市科技支撑重点项目(09ZCGYSF02200)
【分类号】：P208;X826

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