TOPOGRAPHY AND HYDROLOGY.

3.5 TOPOGRAPHY AND HYDROLOGY.

3.5.1 ‘Kawasan Sensitif Alam Sekitar’ (KSAS)

Plan 2.9: KSAS Plan of Ipoh. Source: RTD Ipoh 2020.

Environmental Sensitive Areas (KSAS) is a necessary area given special attention or reasonable consideration before development is allowed in the area or nearby area, where improper development will affect the value of life support, biological diversity or pose a potential risk of disasters. Based on Local Plan Studies (RT) Ipoh 2020 has outlined the cluster area covering 111.93 hectares Gunung Lang and Gunung Bilik as Environmentally Sensitive Areas (KSAS) Phase 2 and should be preserved.

Below are the criteria why Gunung Lang and Gunung Bilik were classified as the KSAS area:-

Table 3.1: KSAS Classification of Environmental Sensitive Areas. Source: RTD Ipoh 2020.

Hence, only activities such as low-impact ecotourism, research and education are justified. Activities such as agriculture and development are not permitted while logging activities are allowed on a small scale with approval and monitoring from the Forest Department.

3.5.2 Demarcation of Safety Zones in the Vicinity of Limestone Hills.

3.5.2.1 Safety Zone Gunung Lang and Gunung Bilike areas

View 1

View 2

Figure 9.2: Part of Gunung Bilike limestone hills safety. Source: Author

zones. The safety zone of Gunung Lang and Gunung Bilike varies from its physical character such as heights, form, and slope percentage.

Limestone element consist from Calcium Carbonate (CaCO3) which can

be affected from chemical and physical reaction, especially on water. This is because this elements are moderate soluble to water. From this reaction, presence of structural cracks, scraping slopes and the overhang realizing the state of rock blocks has the potential to fail.

View 1

View 2

Figure 9.3: Visible undercut can be seen at the foothill Figure 9.4: Non-visible undercut can be seen at of Gunung Bilike which consider it as very high hazards the foothill of Gunung Bilike which consider it as

rating.

high hazards rating.

Source: Google Streets

Source: Google Streets

3.5.2.2 Classification of cliff faces in limestone hill.

Figure 9.5: Class of cliff faces in limestone hills.

Source: author

Based on the above diagram we can analyze that both slopes are considered very high to high hazards rating. Thus the above graphic shows the zone requires in depth study before any development take place.

3.5.2.3 Recommendation/Solution Area within the very dangerous zone, there should be no siting of houses or permanent buildings. Within the dangerous zone, houses or permanent buildings may be constructed with a boulder trap (which may

be a ditch with a bund / retaining wall as designed by a qualified engineer) is constructed at the edge of the zone. To optimize usage of land, public utilities like reservoir and oxidation pond may be sited within the very dangerous zone.

3.5.3 TOPOGRAPHY.

A’

Plan 3.0: Topographic Plan Source: Author

Both Gunung Lang and Gunung Bilike are limestone hills that connected to each other. The highest peak of Gunung Lang is 183 meters and the highest peak of Gunung Bilike is 91 meters. Both limestone hills have a remarkable Both Gunung Lang and Gunung Bilike are limestone hills that connected to each other. The highest peak of Gunung Lang is 183 meters and the highest peak of Gunung Bilike is 91 meters. Both limestone hills have a remarkable

Source: author Gunung Bilike cover an area of 6.23 Gunung Lang cover an area of 105.68

Figure 9.6: Gunung Lang.

Source: author Figure 9.7: Gunung Bilike.

hectares.

hectares.

3.5.3.1 Elevation Profile Both data were taken from Google Earth Pro and cross reference with other resources to get the best result.

Figure 9.8: Elevation profile of Gunung Lang – 183 meters high. A – A’.

Source: Google Earth

Figure 9.9: Elevation profile of Gunung Bilike – 91 meters high. B – B’.

Source: Google Earth

3.5.4 HYDROLOGY

Plan 3.1: Hydrology Plan. Source: author LEGEND

Figure 10.0: Detention Pond at the jetty area. Figure 10.1: Natural earth swale channels towards Source: author groundwater below Gunung Lang. Source: author

The hydrology of Gunung Lang consist of river, lake, ex mining pond, and catchment area. The water runoff from Gunung Bilike and Gunung Lang flows to the nearest drainage and flow towards Pari River. The Pari River then flows to the Kinta River and out streams to Perak River. The water body in Gunung Lang Recreational Park also act as catchment area and channel through underground water to Kinta River.