Topography
The topographical feature of CoCC is not uniform, it has a mixed topography. The elevation of the CC ranges from 9.29 m to 16.58 m PWD. Ward No. 7 contains the highest elevation at 16.58 m, while Ward No. 17 has the lowest elevation at 9.29 m. A topographic map is present in Figure 2-4.
Source: Preparation of Updated Land Use Plan, CoCC
Figure 2‑5: Topographic Conditions in CoCC
The southwest zone of this CC includes hilly track areas with brown, light brown and dark brown granular sandy silts or clayey silts. These soils are very acidic and hard. Soaking conditions are very high to moderately good. There is a high to medium risk of flash floods and erosion. Besides the hilly tracks, most of Comilla is a flat plain area known as alluvium land with both hard and granular sandy or clayey silts. These soils are slightly acidic or neutral. Soaking capacity is not that good.
In the middle of Comilla around the opening of the Meghna River, some stratified silts were observed. These soils are slightly sticky and neutral (or slightly acidic) in reaction. Infiltration capacity of this soil is quite poor. This zone is a flood-prone, flat plate zone.
The area lies in the earthquake Zone 2 (z = 0.15) according to the seismic map of Bangladesh (Ref: BNBC, 1993).
Source: Soil Resource Development Institute
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