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Analisis Kinerja Sub DAS Bila dengan Pendekatan lahan dan Tata Air Khairul Anami, Muhammad Fitrah; Lias, Syamsul Arifin; Ahmad, Asmita
Jurnal Ecosolum Vol. 9 No. 1 (2020): JUNI
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ecosolum.v9i1.8868

The watershed can be seen as a natural system where hydrological biophysic processes and community socio-economic activities take place which results in changes in the carrying capacity of watersheds. The issuance of Government Regulation Number 37 of 2012 concerning Watershed Management became the legal basis for the watershed management to evaluate the Performance of Watershed. At present, the watershed hydrology condition in Wajo district is decreasing which causes an increase in sedimentation in Lake Tempe. This study uses the Purposive Sampling method, gravimetry for determining total suspended solid values, and river discharge measurement. The results showed that the value of Total suspended Solid was still relatively good in the range of 0-100 mg L. For land parameters, the percentage of critical land is included in the medium category, the percentage of vegetation cover is in the bad category, and the erosion index is in the very low category. For the parameters of quality, quantity and water continuity, the flow regime coefficient is in the medium category, the annual flow regime coefficient is in the low category, sediment load is in the very low category, and the water use index is in the very good class. So that the performance of Bila Sub-watershed was included in the medium category. The results showed that the performance of Sub-watershed included in the medium category. The performance of Bila Sub-watershed included in the medium category and did not have a significant sedimentation influence to Lake of Tempe, especially in July.

Karakterisasi Lahan Sawah Bukaan Baru Hasil Konversi Lahan Hutan di Desa Kalosi Kecamatan Towuti Kabupaten Luwu Timur Felix, Irfandi; Neswati, Risma; Lias, Syamsul Arifin
Jurnal Ecosolum Vol. 9 No. 1 (2020): JUNI
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ecosolum.v9i1.9115

The conversion of the function of productive agricultural land to non-agricultural land has taken place and is difficult to avoid as a result of the rapid rate of growth and development in an area so that agricultural production must be increased, especially food production to meet food needs with efforts to expand planting areas and the printing of new fields, but generally constrained by low-quality land. This study aims to determine the characteristics of the new openings paddy fields converted from forest land in the Village of Kalosi District Towuti for the development of irrigated paddy fields. This research method is descriptive, data collection is done by observations in the field and laboratory tests. The determination and sampling of soil in this study is purposive sampling. The results showed that the research location was suitable to be used as an irrigated field which had rainfall of Â± 2329 - 3631 mm/year, an average temperature of 27oC, a minimum temperature of 23oC, a maximum temperature of 32oC, slope 0-8%, clay texture, dusty clay, sandy clay loam, H2O soil reaction 5.6 - 5.9, CEC 35 - 60 cmol/kg clay, C-organic > 2%, salinity 0.15 - 1.20 dS m-1, base saturation > 40%, base cation can be exchanged 11 â€“ 19 cmol kg-1, the dominant type of mineral found kaolinite clay mineral and irrigation water quality has a pretty good standard of water quality.

Korelasi Antara Debit Aliran dan Sedimen Melayang (Suspended Load) di Sungai Data’ Kabupaten Pinrang Zulfikar Ali Ahmad; Muh. Nathan; Syamsul Arifin Lias
Jurnal Ecosolum Vol. 8 No. 1 (2019): JUNI
Publisher : Universitas Hasanuddin

The hydrological process that occurs in a watershed is related to erosion process, sediment transport and downstream deposition. Land use changes and watershed management practices will also affect erosion and sedimentation. The purpose of this study was to determine the magnitude of flowrate, suspended load concentration (suspended load), and floating sediment discharge and correlation of floated sediment discharge and flowrate at the Data’ River. Measuring river characteristics is done by measuring river water flow and river slope. Sediment collection floated with EWI (equal with incerentment) method. Laboratory analysis was carried out by calculating the amount of flow discharge, sediment concentration, and sediment discharge. The results showed the lowest amount of flow discharge occurred on 17/12/2016 with a value of 0.271 m3/s with a floating sediment concentration of 17.167 mg / L, and the sediment discharge floated at 0.402 tons/day. The correlation between flow discharge and floating sediment discharge using a sccatter diagram shows that the determination value R2 is 0.9754 with the equation y = 0.1x + 0.4355.

Karakteristik Ukuran Butir dan Mineral Liat Tanah pada Kejadian Longsor (Studi Kasus: Sub Das Jeneberang) Nur Isra; Syamsul Arifin Lias; Asmita Ahmad
Jurnal Ecosolum Vol. 8 No. 2 (2019): DESEMBER
Publisher : Universitas Hasanuddin

Longsor dapat dipicu oleh karateristik tanah yang terbentuk pada suatu wilayah yang dipengaruhi oleh ukuran fraksi tanah, terutama fraksi tanah yang berukuran lebih halus, yaitu fraksi tanah dari mineral liat. Stabililitas wilayah sub DAS Jeneberang pasca kejadian runtuhnya kaldera Gunung Bawakaraeng, menyebabkan gangguan berupa longsoran disekitar wilayah sub DAS lainnya. Penelitian ini bertujuan untuk mengetahui karakteristik ukuran butir dan mineral liat tanah pada kejadian longsor di sub DAS hulu Jeneberang. Penelitian ini menggunakan metode deskriptif kuantitatif dengan mengidentifikasi ukuran butir menggunakan ayakan ASTM 48 dan mineral liat tanah menggunakan FTIR. Titik longsor (TL) ditentukan dari kejadian longsor yang terjadi dan titik pembanding (TPB) ditentukan dari topografi dan bahan induk yang sama dengan titik longsor. Topografi pada daerah penelitian berombak hingga sangat curam dengan rata-rata curah hujan delapan tahun terakhir 3484 mm/tahun. Hasil analisis Ukuran butiran pada semua titik longsor dan titik pembanding didominasi ukuran 0,5 mm dengan bentuk butiran subrounded pada TL1, TL3, TL5, TL6, TL7, TL8, TL 10, TPB3, TPB4 dan subangular pada TL2, TL4, TL9, TPB1, TPB2. Dari hasil analisis mineral liat bahwa mineral liat dominan pada TL1, TL2, TL3, TL10, TPB1, TPB2 adalah kaolinit. TL6, TL5 adalah haloisit. TL8, TL4 adalah montmorilonit. TL9, TL7, TPB3 adalah klorit dan TPB4 adalah nakrit. Longsor yng terjadi dipicu oleh mineral liat tersedia yaitu kaolinit, haloisit, montmorilonit, dan klorit, sementara ukuran butir tanah tidak memberikan banyak pengaruh pada kejadian longsor.Kata kunci: Sub DAS Jeneberang, Longsor, Ukuran Butir, Mineral Liat Tanah

Analisis Kinerja Sub DAS Bila dengan Pendekatan lahan dan Tata Air Muhammad Fitrah Khairul Anami; Syamsul Arifin Lias; Asmita Ahmad
Jurnal Ecosolum Vol. 9 No. 1 (2020): JUNI
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ecosolum.v9i1.8868

The watershed can be seen as a natural system where hydrological biophysic processes and community socio-economic activities take place which results in changes in the carrying capacity of watersheds. The issuance of Government Regulation Number 37 of 2012 concerning Watershed Management became the legal basis for the watershed management to evaluate the Performance of Watershed. At present, the watershed hydrology condition in Wajo district is decreasing which causes an increase in sedimentation in Lake Tempe. This study uses the Purposive Sampling method, gravimetry for determining total suspended solid values, and river discharge measurement. The results showed that the value of Total suspended Solid was still relatively good in the range of 0-100 mg L. For land parameters, the percentage of critical land is included in the medium category, the percentage of vegetation cover is in the bad category, and the erosion index is in the very low category. For the parameters of quality, quantity and water continuity, the flow regime coefficient is in the medium category, the annual flow regime coefficient is in the low category, sediment load is in the very low category, and the water use index is in the very good class. So that the performance of Bila Sub-watershed was included in the medium category. The results showed that the performance of Sub-watershed included in the medium category. The performance of Bila Sub-watershed included in the medium category and did not have a significant sedimentation influence to Lake of Tempe, especially in July.

Karakterisasi Lahan Sawah Bukaan Baru Hasil Konversi Lahan Hutan di Desa Kalosi Kecamatan Towuti Kabupaten Luwu Timur Irfandi Felix; Risma Neswati; Syamsul Arifin Lias
Jurnal Ecosolum Vol. 9 No. 1 (2020): JUNI
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ecosolum.v9i1.9115

The conversion of the function of productive agricultural land to non-agricultural land has taken place and is difficult to avoid as a result of the rapid rate of growth and development in an area so that agricultural production must be increased, especially food production to meet food needs with efforts to expand planting areas and the printing of new fields, but generally constrained by low-quality land. This study aims to determine the characteristics of the new openings paddy fields converted from forest land in the Village of Kalosi District Towuti for the development of irrigated paddy fields. This research method is descriptive, data collection is done by observations in the field and laboratory tests. The determination and sampling of soil in this study is purposive sampling. The results showed that the research location was suitable to be used as an irrigated field which had rainfall of ± 2329 - 3631 mm/year, an average temperature of 27oC, a minimum temperature of 23oC, a maximum temperature of 32oC, slope 0-8%, clay texture, dusty clay, sandy clay loam, H2O soil reaction 5.6 - 5.9, CEC 35 - 60 cmol/kg clay, C-organic > 2%, salinity 0.15 - 1.20 dS m-1, base saturation > 40%, base cation can be exchanged 11 – 19 cmol kg-1, the dominant type of mineral found kaolinite clay mineral and irrigation water quality has a pretty good standard of water quality.

PEMETAAN POTENSI KERUSAKAN TANAH DI KABUPATEN POLEWALI MANDAR: Mapping of Potential Soil Damage in Polewali Mandar District Syamsul Arifin Lias; Syahrul
Jurnal Ecosolum Vol. 10 No. 2 (2021): DESEMBER
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ecosolum.v10i2.19533

As a natural resources that must be maintained for its sustainability, land with all its functions and roles has an essential position in the ecosystem. As a growing medium for producing biomass, soil has the potential to experience quality degradation due to uncontrolled human activities, especially the production of biomass itself. The first step in overcoming soil damage is to carry out an inventory of the potential soil damage in an area. Inventory can be done by mapping spatially, especially on the potential factors of soil damage. The unavailability of information on potential soil damage, both in terms of area and distribution, is an obstacle in monitoring and controlling soil damage in various areas, including Polewali Mandar District. The purpose of this study was to map the distribution and extent of potential soil damage in Polewali Mandar District. This research was carried out by referring to the technical guidelines for compiling soil damage status maps for biomass production. This map is based on the main thematic maps and other supporting data and information. The potential for soil damage was analyzed using two approaches, namely the superimpose/overlay method or overlapping thematic maps and the scoring method for factors considered to have an effect on soil damage. Based on the results of the weighting analysis of all potential soil damage variables, information is obtained that the research area has 3 classes of potential soil damage. Potential damage II (PR II) with a low class area of 49,288.1 Ha or about 23% of the research area. The potential for damage III (PR III) with moderate class is 147,553.7 ha or about 70.7% of the research area. The potential for damage IV (PR IV) with high class area is 613.6 Ha or about 0.3% of the research area.

INDEKS BAHAYA EROSI DI SUB DAS PASUI HULU DAS SADDANG: Erosion Hazard Index in Upstream Sub Watershed Pasui of Saddang Watershed Lia Asmira; Syamsul Arifin Lias; Sartika Laban
Jurnal Ecosolum Vol. 11 No. 1 (2022): JUNI
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ecosolum.v11i1.21597

Sub watershed Pasui is an upstream area of Saddang watershed with mountain topography dominated by agricultural cultivation activities of coffee, cocoa, cloves and onions without conservation methods. Agricultural cultivation activities that do not apply conservation methods on steep slopes are expected to increase the rate of erosion in this region. This study is aim to determine the magnitude of potential erosion and erosion hazard index in Sub watershed Pasui upstream Saddang watershed. The method of study is conducted survey and soil sampling in Sub watershed Pasui, Baraka subdistrict and Buntu Batu, Enrekang regency. The study took place from February to August 2021. Erosion restoration uses the USLE method, while the restoration of erosion hazard index refers to The Minister of Forestry Regulation No. 60 of 2014. Paddy field cover, mixed dry land agriculture and forest are classified as low erosion hazard index class with potential erosion value <15 ton/ha/year. Meanwhile, dry land and savanna agriculture belong to a very high erosion hazard index class with a potential erosion value. The weighted average potential erosion value is 189,46 tons/ha/year, while the weighted average erosion hazard index in the Sub watershed Pasui upstream Saddang watershed is 8,83 and belongs to the highest erosion hazard class.

Kajian Erosi pada Hutan Tanaman Industri di Kecamatan Tompobulu Kabupaten Maros: Erosion Study in Industrial Plantation Forests in Tompobulu District, Maros Regency Lias, Syamsul Arifin; Laban, Sartika; Asyraf, Muhammad
Jurnal Ecosolum Vol. 12 No. 2 (2023): DESEMBER
Publisher : Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ecosolum.v12i2.25855

The small value of erosion on a land is sometimes ignored even though it can sometimes have an effect on a land. Industrial plantation forests (HTI) are present as a government effort to combine timber production and forest rehabilitation. However, the problems faced are low land productivity, decreased soil fertility due to erosion processes in the soil layer. The research hypothesis is that the use of a layered canopy, good soil infiltration will reduce the rate of erosion and surface flow. This research aims to study the amount of erosion in industrial plantation forests in Tompobulu District, Maros Regency. This research was conducted in January-February 2022 in Bahagia Hamlet, Bontomanurung Village, Tompobulu District which was carried out using the erosion plot method. Erosion plots were made in two stands in monoculture and agroforestry industrial plantation forest areas. The measurement results of the amount of flow rate in monoculture HTI is greater than agroforestry HTI which each has a surface flow, namely 113.86 m3/ha and 55.43 m3/ha. While the erosion rate in monoculture HTI is greater than agroforestry HTI, each of which has an erosion rate, namely in monoculture HTI of 0.19 tons/ha and agroforestry HTI of 0.06 tons/ha. The estimated value of annual erosion and tolerable soil loss (TSL) in each stand, namely monoculture HTI is 2.57 tons/ha/year and 4.69 tons/ha /year, while in agroforestry HTI respectively 1.45 tons/ha/year and 9.69 tons/ha/year. Each of the two stands produced estimates of annual erosion that were smaller than the tolerable soil loss (TSL). Good interception (use of layered canopy, vegetation with large leaf surface area) and good infiltration can reduce erosion and surface runoff.

Water availability analysis of Walanae River Lias, Syamsul Arifin; Assegaf, A; Sakka, Sakka; Paharuddin, Paharuddin; Syamsuddin, E
Anjoro: International Journal of Agriculture and Business Vol 3 No 1 (2022): Anjoro
Publisher : Agribusiness Department, Agriculture and Forestry Faculty, Universitas Sulawesi Barat, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/anjoro.v3i1.1442

The Walanae Watershed plays an essential role as a water provider for irrigation and industry in the central part of South Sulawesi Province, Indonesia. The Walanae River flows through Enrekang, Soppeng, and Bone Regencies. This paper describes the availability of water in the Walanae watershed. Water discharge of the Walanae river recorded at Tampangeng station from 2000 to 2014 is analyzed using descriptive statistics to obtain a flow duration curve. The calculation results show that the available discharge is quite extensive throughout the year with a range of 16.5 m3.s–1–316 m3.s–1, and an average of 138 m3.s–1. The minimum discharge generally occurs from September to November, while the peak discharge generally occurs in January and July. The results show that water availability for 9, 10, 11 months, and all years are: 92.2 m3.s–1, 83.4 m3.s–1, 66.3 m3.s–1, and 15.8 m3.s–1, respectively.

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