Physical Density and Urban Sprawl: A Case of Dhaka City - KTH

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Physical densities Area of block including half of the surrounding roads width = 5776 sq.meters (approximately) Area covered by buildings = 3340 sq.meters (approximately) Total floor area of all buildings = 6113 sq.meters (approximately) So, FAR = 6113/5776 = 1.06 (approximately) Land coverage = 3340/5776 = 57% (approximately) Number of storeys = 1 to 4 (estimated) Spatial qualities The plot size is very narrow. The space among the buildings is 3 to 5 feet where the land coverage by individual building is approximately 85 to 87% but the height of the building is low. The surrounding road is narrow as well. 5.6 Newly planned Defense Officers’ Housing Society (DOHS) at Baridhara in Gulshan. This area has been developed by the Defense Authority to provide housing to the retired defense officers. It is situated at Baridhara in Gulshan thana. Figure 5.6: Aerial photograph of New DOHS at Baridhara in Gulshan. Source: Google Earth, 2007. Physical densities Area of block including half of the surrounding roads width = 6991 sq. meters (Approximately) Land covered by buildings = 4257 sq. meters (Approximately) Total floor area of all buildings = 21578 sq. meters (Approximately) So, FAR = 21578/6991 = 3.1 (approximately) Land coverage = 4257/6991 = 61 % (approximately) Number of storeys = 2 to 6 (estimated) Spatial qualities There are a total 15 plots in the area. All of them are already developed. The house to house space is 5 to 6 feet. The houses are very close to each other. There is no private or semi private open space inside the block. There are roads in its four sides. 50
CHAPTER 6 FINAL ANALYSIS Chapters 4 and 5 have showed the findings explored from the selected case study locations in light of theories discussed in the chapter 2 to fulfill the aims and objectives of this study. This chapter will provide analysis of those findings, as for example physical densities, in terms of FAR and percentage of land coverage by buildings as well as spatial qualities, in terms of space usability, cross ventilation and presence of daylight inside the selected case blocks of formal and informal settlements. 6.1 Physical densities One of the objectives of this present study was to analyze the physical densities of housing block, in terms of FAR and percentage of land coverage by buildings of housing settlements. According to Rådberg, the parameters that can be used to measure urban physical density are: residential density, building height and percentage of built up area (Rådberg, 1996:390) which have been analysed in chapter 2 of this study. The residential density which means FAR and the percentage of land coverage by building are being considered in this study to measure the physical densities. In this study FAR is the ratio between total floor area by number of floors and the land area. The total floor area means the area of total floors occupied by all the buildings available in the block. The land area includes the total land area covered by block with half of its surrounding roads width. Percentage of land coverage is the percentage of total land covered by buildings inside the block and the total land area of block with half of its surrounding roads. The analysis of FAR and percentage of land covered by buildings have been done according to the theory of Rådeberg which is about the classification of urban block types in Sweden (chapter 2). The FAR values which have been found from the measurements for the formal and informal settlements show that the two informal settlements containing very low FAR values where as the percentage of land coverage by houses inside the blocks are very high. On the other hand the formal settlements containing FAR values ranging from approximately 0.95 to 3.1 which can be considered as a medium to high where the percentage of land coverage is ranging from 21% to 61%. The characteristics, in terms of physical densities and spatial qualities of the most informal housing settlements in Dhaka city are similar. But there is a variation in terms of house forms. The physical densities, spatial qualities and house forms of ‘Tikkapara Bustee’ in Mohammadpur are similar to the most of the informal settlements in Dhaka city where the houses are made by earth materials. On the other hand the houses in ‘Geneva camp’ are made by brick walls and tin’s roof. It is based on this that the two different informal settlements were selected as a case. The first case of the informal settlements is ‘Geneva camp’ where FAR value is ranging from 0.81 to 0.85 can be treated as a very low dense, in terms of FAR value. All of the houses in this settlement are 1 storey. The percentage of land coverage by houses are very high like 93%.The second case informal settlement is ‘Tikkapara Bustee’ in Mohammadpur thana where FAR value is also very low, for instance maximum 0.74. In this case land coverage by buildings is maximum 74% which is also very high for any residential area. All of the houses are one storey in this settlement. In both cases the percentage of land coverage by houses is very high which means that there is a shortage of space inside the 51
Page 1 and 2:
KTH Architecture and the Built Envi
Page 3 and 4:
CHAPTER 6: FINAL ANALYSIS..........
Page 5 and 6: ABSTRACT Md. Syful Islam: Physical
Page 7 and 8: CHAPTER 1 INTRODUCTION This study a
Page 9 and 10: Habraken (1998:292-93) states that,
Page 11 and 12: Since the study is dealing with the
Page 13 and 14: Banani Model Town residential area
Page 15 and 16: Applied Procedure to calculate land
Page 17 and 18: CHAPTER 2 THEORY OF THE CONCEPTUAL
Page 19 and 20: crowded and unsuitable environments
Page 21 and 22: unrealistic because tall buildings
Page 23 and 24: Carlos Barquin et. el. (1986) emplo
Page 25 and 26: Fig 2.7: Cluster of Informal settle
Page 27 and 28: Figure 3.1: Physical growth of Dhak
Page 29 and 30: Until 1951, Bangladesh was almost c
Page 31 and 32: 3.5 Land use pattern of Dhaka city
Page 33 and 34: construction is illegal while squat
Page 35 and 36: even accuse RAJUK, the most promine
Page 37 and 38: CUS, the number of informal settlem
Page 39 and 40: Figure 3.9: Ratio of formal and inf
Page 41 and 42: CHAPTER 4 FINDINGS FROM THE INFORMA
Page 43 and 44: Spatial qualities Spatial qualities
Page 45 and 46: settlement are selling their daily
Page 47 and 48: The houses are very close to one an
Page 49 and 50: Figure 4.15: The space inside the h
Page 51 and 52: It can be seen from the findings of
Page 53 and 54: 5.2 Shobhanbagh officers’ colony
Page 55: . Figure 5.4: Aerial photograph of
Page 59 and 60: narrow roads for drying and washing
Page 61 and 62: CHAPTER 7 RECOMMENDATIONS AND CONCL
Page 63 and 64: of proper monitoring in housing mar
Page 65 and 66: Nnaggenda-Musana A., (2004), Sprawl
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Physical Density and Urban Sprawl: A Case of Dhaka City - KTH

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