Characterizing the urban environment through urban morphology types (UMTs) mapping and land surface cover analysis: the case of Addis Ababa, Ethiopia
Characterizing the urban environment through urban morphology types (UMTs) mapping and land surface cover analysis: the case of Addis Ababa, Ethiopia
复制标题
通过城市形态类型 (UMT) 制图和地表覆盖分析来表征城市环境：以埃塞俄比亚亚的斯亚贝巴为例
DOI：
10.1007/s11252-016-0590-9
复制
发表时间：
2017
期刊：
影响因子：
2.9
通讯作者：
S. Lindley
中科院分区：
文献类型：
--
作者：
Tekle Woldegerima;Kumelachew Yeshitela;S. Lindley
通过城市形态类型（UMTs）描述城市环境有助于确定城市区域的哪些部分应该得到保护。本研究的目的是绘制并检测亚的斯亚贝巴市城市形态类型和地表覆盖的变化。通过对正射校正的航空照片进行数字化处理，绘制了2006年和2011年的城市形态类型图。确定了11个较高级别和35个详细的城市形态类型作为研究基础。在2006年所定义的较高级别城市形态类型中，最主要的城市形态类型是农业，占总面积的38%，而在2011年，居住类城市形态类型的土地覆盖率最高（33.3%），这表明其他土地用途迅速转变为居住用途。地表覆盖分析使用了12种地表覆盖类别。2006年至2011年的变化分析显示，一类建筑结构（通常规划良好的高层建筑）、非桉树、深色裸地、浅色裸地和蔬菜农场的地表覆盖类型呈现正向变化，而二类建筑结构（非正式的、通常无规划的非高层建筑）、桉树、灌木/矮树丛植被、草地和大田作物覆盖呈现负向变化。研究结果还表明，亚的斯亚贝巴近一半的地表覆盖可被视为具有蒸散作用。为了维持平衡的城市环境，城市中的所有绿地都应进行生态网络化，并且绿地规划应旨在确保在城市持续快速城市化的过程中遵循多功能性原则。
Characterizing the urban environment through urban morphology types (UMTs) can help to decide on what parts of urban areas should be conserved. The aim of this study was to map and detect changes in UMTs and land surface cover in the city of Addis Ababa. UMT maps for 2006 and 2011 were produced by digitizing ortho-rectified aerial photographs. Eleven higher level and 35 detailed UMTs were identified as the basis for the study. Within the defined higher levels of UMTs in 2006, the most dominant UMT was agriculture covering 38 % of the total area while in 2011 residential UMTs stand out with the highest land coverage (33.3 %) indicating rapid conversion of other land uses to residential category. Land surface cover analysis used 12 surface cover categories.Change analysis between 2006 and 2011 revealed that surface cover types of built structure type I (generally well planned and high rise buildings), non-eucalyptus trees, dark bare-ground, light bare-ground and vegetable farm showed positive change whereas built structure type II (informal, generally unplanned, and non-high rise buildings), eucalyptus trees, shrub/bush vegetation, grassland and field crop cover showed negative change. The results also showed that almost half of the land surface cover of Addis Ababa could be considered to be evapotranspiring. To maintain a balanced urban environment, all green spaces in the city should be ecologically networked and the planning of green space should aim to ensure that principles of multi-functionality are followed as the city continues to undergo rapid urbanization.