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Decree, flood hazard parameters and rain intensity
parameters are different things. In the landfill site that
has relatively high rainfall, the likelihood of flooding
will be higher, so that it will cause solid waste to
move and cause landslides. Landfill location should
be placed in a low rainfall area, so that the lower the
better for landfill site (Maatuil and Fibriani, 2016).
Based on the BPS data of Tarakan City in 2017,
the average rainfall is relatively low, So, this could be
the reason for the construction of the landfill site. the
smaller the intensity of the rain, the better the
construction of the landfill site is (Antonius Arik
Rumbruren, 2012). This is because if the rain
intensity is high, the risk of flooding is also greater.
Therefore, the construction of landfill sites should be
carried out in locations with low rainfall.
3.2 Geology of landfill locations
Geology is basically the study of the earth and the
phenomena that occur. In science, the the results of
geological survey discuss the earth-forming material
and all the processes that will occur both within the
earth and above the surface of the earth. Therefore,
the description of the geological conditions in the
planned area of a construction that will be built,
including reviewing the dangers that will arise in the
development process, to provide information on the
level of security of the development results on a
construction and efficiency of costs will be used
during development takes place (Treman, 2014).
Most of Tarakan City consists of geological
elements in the form of units (TPQS) namely quartz
sandstone, clay stone, siltstone, lignite and
conglomerate. The composition of the geological
structure is spread in Tarakan City covering an area
of 16,058 Ha (64.03%) of the land area of Tarakan
City. Meanwhile, the rest is in the form of units (Qa),
namely mud, silt, sand, gravel and greed covering an
area of 9,022 Ha (35.97%) of Tarakan City’s land
area (BPS Kota Tarakan, 2017).
In general, the geological condition of Tarakan
City is in the form of hilly areas with wide lowlands.
Geological layers that exist in the city of Tarakan
generally are in the form of clay stones and are
followed by sandstone, coal, quarter sediment,
conglomerates, lemung montmorillonite, and clay
sand. The landfill area is an area with a land type in
the form of a conglomerate area (BPS Kota Tarakan,
2017)
Conglomerate rocks are one type of sedimentary
rocks formed from small particles that form
sedimentation. The conglomerate rocks are rough and
large textured. The composition of conglomerate
stones is derived from sand, gravel and soil. Besides
that, it also comes from weathering of rocks from
conglomerate rocks. Basically, conglomerate rocks
are not strong rock types. So, they cannot be used as
the foundation or structure of a building. However, if
the conglomerate rocks are destroyed, they can be
used as a support for the building. The geological
condition of Tarakan City can be seen in Figure 2.
Figure 2: Geological Conditions of Tarakan City
Geological location with soil conditions that are
quite hard are very desirable for Landfill. Usually,
clay or other compact rocks are considered feasible
for landfill locations. Hard/cracked or permeable hard
rocks will increase the potential for leachate that
spread outside landfill area (Damanhuri, 2008). It
means that geological condition in Tarakan City has
fulfilled the criteria for landfill location.
3.3 Soil type on landfill location
The condition of soil types is one of important factors
in the study of landfill planning. Land is a basic
material that is very important as the foundation
structure of buildings, highways, and others.
Damages of roads, buildings, and bumpy road
Physical Factor Analysis of Juata Laut Landfill’s Planning Location in Tarakan City, North Kalimantan
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