pISSN: 2723 - 6609 e-ISSN: 2745-5254
Vol. 5, No. 5 Mei 2024 http://jist.publikasiindonesia.id/
Jurnal Indonesia Sosial Teknologi, Vol. 5, No. 5, Mei 2024 2066
Calculation Analysis of Erosion Rates and Sedimentation
Transport in the Liliba Watershed
Sri Santi L M F Seran
1*
, Agustinus H Patiraja
2
, Krisantos Ria Bela
3
, Azarya Bees
4
,
Muritius I R Naikofi
5
Universitas Katolik Widya Mandira, Indonesia
*Correspondence
ABSTRACT
Keywords: USLE, SDR,
Erosion, Sedimentation.
Erosion is the loss or erosion of land or parts of land from a
place by water or wind. Erosion causes the loss of fertile soil
layers good for plant growth and reduces the soil's ability to
absorb and retain water. The Liliba watershed area in
Kupang City includes Maulafa District, Oebobo District, and
Kelapa Lima District. The Liliba River Watershed (DAS) is
part of the development of the Noelmina River area, which
flows into Oesapa Beach. The Liliba watershed has an area
of 4,534 hectares with a central river length of 20,176.22 m.
Using the USLE Method and SDR Transport Analysis, it
was found that the erosion that occurred was 3.72 tonnes per
year, and the amount of sediment transport that occurred was
2.73 tonnes per year.
Introduction
The biggest challenge in managing natural resources is to create and then maintain
a balance between fulfilling the needs of human life and the sustainability of the use and
existence of natural resources (Asdak, 2023). The primary natural resources, namely land
and water, are renewable but easily damaged or degraded. Soil damage can occur by (1)
loss of soil elements and organic material in the root area, (2) accumulation of salt in the
root area, (3) saturation of the soil with water, and (4) erosion. This soil damage causes a
reduction in the soil's ability to support plant growth (Anasiru, 2015).
According to (Neolaka et al., 2022), erosion is the loss or erosion of land or parts
of land from a place by water or wind. Erosion causes the loss of fertile soil layers good
for plant growth and reduces the soil's ability to absorb and retain water. A river basin
(DAS) is a land area topographically limited by mountain ridges that collect and store
rainwater. It becomes a water catchment area to channel it to the sea via the main river
(Asdak, 2023). A water catchment area is an ecosystem whose main elements consist of
natural resources, including land, water, and vegetation, as well as human resources as
users of natural resources (Soetedjo, n.d.).
The Liliba river basin (DAS) is administratively located in 2 (two) administrative
areas, namely Kupang City and Kupang Regency. The Liliba watershed area in Kupang
Regency includes Nekamese District and Taebenu District. The Liliba watershed area in
Calculation Analysis of Erosion Rates and Sedimentation Transport in the Liliba Watershed
Jurnal Indonesia Sosial Teknologi, Vol. 5, No. 5, Mei 2024 2067
Kupang City includes Maulafa District, Oebobo District, and Kelapa Lima District. The
Liliba River Watershed (DAS) is part of the development of the Noelmina River area,
which flows into Oesapa Beach (Seran, 2022). The Liliba watershed has an area of 4,534
hectares with a central river length of 20,176.22 m. The Liliba watershed serves the
community's agricultural needs, flood control, and tourism activities (Kupang et al.
Number 12 of 2011). Currently, there are many social activities along the banks of the
Liliba River. This can be seen in many residential developments, even those on the river's
edge. It can also be seen that a lot of rubbish is thrown into the river basin. This, of course,
also influences the emergence of sedimentation in river basins (Sudira et al., 2013). This
research aims to obtain initial data so that it can be compared again with analyses that
will be carried out in the next 5 or 10 years. This research aims to determine the rate of
erosion in the Liliba watershed using the Usle method.
Research Methods
The research was conducted in the Liliba River Watershed, Kupang City
Figure 1
Location of the Liliba watershed
The first analysis is erosion analysis using the USLE method.
The research method used in erosion analysis is the USLE (Universal et al.
Equation) method, which involves several essential steps. First, primary data on the study
location, including soil type, topographic characteristics, rainfall patterns, and land use,
were carefully collected. Furthermore, these parameters will be used to calculate erosion
using the USLE formula. The next step is to apply the USLE formula, which includes soil
erosion, slope, land cover, and land management factors. The data that has been collected
Sri Santi L M F Seran, Agustinus H Patiraja, Krisantos Ria Bela, Azarya Bees, Muritius I R
Naikofi
Jurnal Indonesia Sosial Teknologi, Vol. 5, No. 5, Mei 2024 2068
will be processed and analysed using this method to produce an estimate of the level of
soil erosion at the study location. Subsequent analysis will compare these results with
existing erosion standards and identify the main factors contributing to soil erosion in the
area (Sujatmoko & Hirvan, 2022). This approach is hoped to provide an in-depth
understanding of the level of soil erosion and the factors that influence it, which can be
used for more sustainable land management and environmental protection.
Figure 2 Research Flow Diagram
Results and Discussion
The Liliba watershed is in Kupang Regency (upstream) and Kupang City (middle
and downstream). Taebenu sub-district, Kupang Regency on the east side, and two sub-
districts in Kupang City, namely Maulafa sub-district and Oebobo sub-district.
Meanwhile, the downstream part is the Kelapa Lima sub-district in Kupang City (Fathan,
Conclution
Discussion
Analysis Using the
USLE Method
Data sekunder
Data Primer
Study Literature
Calculation of
Sediment Transport
Using SDR
Start