. Geomorphologic classification
4.1: Topographic unit and the range of elevation for
Based on the observation of
topographic map, the topography was
divided into rolling, undulating and hilly area. This is shown according to the
topographic unit and the range of elevation for each unit in Table 4.1.
Mean elevation (m)
< 15 meter ASL 16-30 31-75 76-300 >301
Based on the 3D map also which was shown in Figure 4.4, there are three different regions of the study
area in term of their elevation. The brown color
at the southern part of the map shown that the area was covered by the hilly
area also was followed by maroon and
yellow color. A little bit of hilly area in the eastern part of the map. Furthermore, most of the hilly area was covered
by the forest. Besides, the other part of geomorphology in the topographic map
was covered about 60% by the elevation of 50 – 100 meters that indicates
undulating and also hilly area who is green in colour.
Moreover, the blue colour represents a rolling
area which their elevation is 10 – 30 meter.
Then from the observation in the study area also there are a lot of mountains
which have a gentle slope. This is because it has
a low gradient slope which actually indicates
a soft rock named sedimentary rock. This sedimentary rock contributes to a lot of geomorphology event
such as mass wasting. This is because water which content in a sedimentary rock
has the ability to store water. Thus, the
water will flow until it was carried away by the influence of the gravity.
Meanwhile, the other geomorphology event is there is a lot of hill cutting which actually gave a new information
about the interior strength of the hills. In addition, when the soil of the
hill has been disturbed, the strength of
the soil will be low. Thus it will influence a landslide and other structural
geology such as fault to happen
Furthermore, this area also was used as a
site of mining exploration of gold a long time ago. The evidence that has been found is ex-mines that have been changed to small ponds and lakes (Figure 4.5). In addition,
there is also a former mine site that has been dumped by sand from the river
containing gold to re-develop the new gold mine (Figure 4.6). Lastly, an observation also reveals that the dominant
living species within the vicinity of the former mine site or those living in
the former mines are Melastoma
malabathricum (Figure 4.7) or it is known as Pokok Senduduk among the
villagers. This plant is no longer visible when the study is approaching the
area filled with timber.