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Iwan Juwana
Institut Teknologi Nasional (Itenas) Bandung
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Engineering Environmental Science Other

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Valuasi Ekonomi Objek Wisata Goa Pindul Kabupaten Gunungkidul Menggunakan Pendekatan Travel Cost Method WIBIARIKSA PUTRI; IWAN JUWANA
Jurnal Reka Lingkungan Vol 7, No 1 (2019)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekalingkungan.v7i1.1-11

Abstract

AbstrakWisata Goa Pindul Kabupaten Gunungkidul merupakan wisata penelusuran goa dengan peningkatan jumlah pengunjung yang signifikan pada setiap tahunnya. Wisata Goa Pindul merupakan barang publik sehingga dibutuhkan pendekatan untuk menerjemahkan nilai ekonomi yang dimilikinya. Salah satunya menggunakan Travel Cost Method yaitu metode valuasi ekonomi dengan memanfaatkan biaya perjalanan pengunjung sebagai nilai ekonominya.  Penelitian ini menggunakan dua pendekatan Travel Cost Method. Zonal Travel Cost Method (ZTCM) merupakan metode analisis biaya perjalanan yang dikeluarkan pengunjung dengan membagi jumlah pengunjung dari berbagai lokasi yang berbeda jarak. Individual Travel Cost Method (ITCM) merupakan metoda analisis biaya perjalanan menggunakan data survey yang berasal dari pengunjung secara individu dalam analisis statistik. Hasil penelitian ini diketahui nilai ekonomi total dari Goa Pindul sebesar Rp. 10.705.348.126 menggunakan ZTCM dan Rp. 26.075.382.185 menggunakan ITCM. Nilai surplus konsumen yang didapat sebesar Rp. 7.428.342.496 menggunakan ZTCM dan Rp. 10.399.524.104 menggunakan ITCM. Nilai ekonomi yang diketahui nantinya dapat dimanfaatkan sebagai alternatif pengelolaan lingkungan.Kata kunci: Goa Pindul, Nilai Ekonomi Total, Travel Cost Method, Surplus Konsumen.
Penyusunan Indeks Tingkat Pelayanan Sistem Pengelolaan Sampah Kota ABDUL ASIS RUMAKAT; IWAN JUWANA; SITI AINUN
Jurnal Reka Lingkungan Vol 9, No 1 (2021)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekalingkungan.v9i1.23-33

Abstract

AbstrakData PD. Kebersihan Kota Bandung, menunjukkan persentase tingkat pelayanan sampah pada tahun 2017 sebesar 98,14%. Namun pada kenyataannya, masih banyak ditemukan tumpukan sampah di beberapa tempat yang bukan peruntukannya, hal ini menunjukkan angka tersebut belum dapat mewakili pelayanan sampah secara keseluruhan. Penelitian ini bertujuan untuk menyusun indeks yang digunakan untuk menilai kinerja pelayanan sampah kota. Indeks ini disusun dengan cara mengidentifikasi komponen, indikator dan sub-indikator, menentukan kriteria penilaian, melakukan pembobotan, melakukan penggabungan serta menyusun interpretasi indeks. Terdapat 5 komponen, 26 indikator dan 21 sub-indikator yang teridentifikasi. Pembobotan dilakukan dengan pemberian nilai berbeda pada komponen, indikator dan sub-indikator dengan metode aritmatik. Interpretasi indeks dibuat kedalam 5 kategori dengan skala 0-100. Dari hasil penyusunan indeks ini, selanjutnya akan digunakan untuk menilai tingkat pelayanan persampahan di Kota Bandung.Kata kunci : tingkat pelayanan, komponen, indikator, sub-indikator. AbstractAccording to the data from PD Kebersihan Kota Bandung, in 2017 the percentage of the performance level of solid waste is 98.14%. However, it is visible that a large amount of solid waste dumped directly to the environment. This indicates that the existing service level performance value is unable to represent the overall solid waste service. Thus, this study aims to develop a solid waste service level index. This study was undertaken by selecting components, indicators and sub-indicators, determining the weights for the components, indicators and sub-indicators, as well as defining the aggregation and interpretation of the final index. Thorough this study, 5 components, 26 indicators and 21 sub-indicators were identified. The chosen weights for the index was the different weighting. Aggregation index using arithmetic method with the interpretation of the final index will be based on 5 categories of 0-100 scale. Keywords : service level, component, indicator, sub-indicator.  
Studi Komparasi Komposter Berbasis Masyarakat NATASYA HASNA; IWAN JUWANA; MOHAMAD SATORI
Jurnal Reka Lingkungan Vol 9, No 1 (2021)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekalingkungan.v9i1.34-44

Abstract

AbstrakSampah organik merupakan sampah dominan di  Bank sampah Sahdu, maka perlu pengolahan untuk mengurangi timbulan sampah organik di TPA. Penelitian ini membandingkan 3 jenis komposter aerob di Bank sampah Sahdu yaitu bata terawang, drum dan takakura. Jenis sampah yang digunakan adalah sampah organik campuran (sisa makanan dan sampah halaman). Kapasitas komposter bata terawang, drum dan takakura dapat menampung sampah per harinya dari 456, 210 dan 20 sumber. Kinerja komposter bata terawang, drum dan takakura dalam mengolah sampah organik menjadi kompos adalah 53,45%, 48,27% dan 56,01%. Kualitas kompos yang dihasilkan seluruh komposter memenuhi baku mutu, kecuali parameter pH kompos dari hasil komposter drum tidak memenuhi baku mutu. Kata kunci: sampah organik, bank sampah, komposter aerobik.Abstract Organic waste is the most dominant waste produced, thus the reduction of this type of waste will reduce waste entering the landfill. This research aims were to compare the performance of 3 types of aerobic composters in Waste bank Sahdu which are brick overlay, drum and takakura. The wastes used in this research is mixed organic waste (food waste and yard waste). The capacity of brick overlay, drum and takakura are able to treat waste per day from 456, 210 and 20 households respectively. As related to their performance, the bric overlay, drum and takakura are able to treat 53,45%, 48,27% and 56,01% of organic waste into compost, respectively. The compost quality that produced by all composter has met the standard quality, except pH parameters from the composter drum. Keyword: organic waste, waste bank, aerobic composter. 
Pengembangan Indeks Penilaian Bank Sampah Skala Kota Studi Kasus Kota Bandung dan Kota Cimahi MEGA PRANADITYA; IWAN JUWANA; SITI AINUN
Jurnal Reka Lingkungan Vol 8, No 2 (2020)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekalingkungan.v8i2.121-133

Abstract

AbstrakBank sampah skala kota adalah aplikasi pengelolaan sampah untuk mengurangi sampah suatu kota yang akan dibuang ke TPA. Penelitian ini bertujuan untuk menyempurnakan indeks sebelumnya. Dengan meninjau indikator sebelumnya melalui tinjauan pustaka, yang kemudian akan divalidasi dengan metode AHP untuk menentukan pembobotan. Terdapat 4 kategori responden yaitu, professional expert, akademisi, instansi dan pihak bank sampah. Kajian ini menghasilkan tiga komponen, tiga belas indikator dan enam puluh satu sub-indikator teridentifikasi. Berdasarkan hasil AHP, bobot dari masing-masing komponen adalah Sistem Manajemen (40%), Sistem Operasional  (30%) dan Fasilitas Bank Sampah (30%). Jumlah indikator dari masing-masing komponen berkisar 4-5 indikator dengan bobot 15%-35%. Adapun sub indikator memiliki jumlah berkisar 2-8 dengan bobot 10%-50%.  Kata Kunci : Bank Sampah, Indeks, Metode AHP, Komponen, Indikator, Sub-IndikatorAbstractWaste bank is one application of waste management by utilizing waste that is considered having re-sellvalues, which at the end can be used to reduce the waste dumped into landfill. Thus, a tool to assess the readiness of a waste bank to function at a city-scale is needed.This study aims to refine the previous index. This was done by first, reviewing previous indicator through literature review, which was then verified by the application of the AHP method which was usedwas also used to determine the weights for each indicator. The respondents for AHP applications were selected from four categories which were garbage expert, academics, intitutions and management representatives of waste bank. At the end of the study, three components, thirteen indicators and sixty one sub-indicators were identified. The name of the components and their respective weights are Management System (55%), Operating System (25%) and Waste Bank Facility (20%). The number of indicators from each components ranged from 4 to 5 indicators with the weights range from 15% to 35%. As for the sub indicators, they range from 2 to 8 sub indicators with the weights between 10% to 50%.  Kata Kunci : Waste Bank, Index, AHP Method, Components, Indicators, Sub-Indicators
Calculation of Pollutant Load in Cipunagara River: Livestock Sector Iwan Juwana; Diki Prastyo Nugroho
Journal of the Civil Engineering Forum Vol. 6 No. 2 (May 2020)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1111.55 KB) | DOI: 10.22146/jcef.52675

Abstract

Cipunagara is the largest watershed in Subang Regency with River Cipunagara as the mainstream. Previous works showed increased activities around Cipunagara watershed, especially in segment 3, leading to a decline in the water quality. The importance of this river increases due to the development plan of Sadawarna and Cilame Reservoirs, which are used for irrigation and other activities. This study aims to identify pollution sources and to analyze the capacity of Cipunagara River in relation to potential pollution load from the watershed for the next 5 years. The study focuses on livestock, which is one of the main sectors contributing to pollution. The main steps include segment selection, calculation of existing pollutant load and prediction within the next 5 years from livestock waste. The segment selection was based on the number of activities from several sectors, the spatial plan of the region, as well as the quality and quantity Cipunagara River. The calculation of existing pollutant load was based on actual pollutant and flow of the river, while the prediction of pollutant load relied on emission factor of each pollutant parameter. The results showed that pollution index in Cipunagara River was severe. The existing and the projected potential pollutant loads in segment 3 include 1,668.76 kg/day and 2,081.25 kg/day for BOD; 4,053.74 kg/day and 5,063.29 kg/day for COD; 8.72 kg/day and 13.34 kg/day for N-Total; and 1.75 kg/day and 2.16 kg/day for P-Total, respectively. These results can be used by the local governments to manage water quality of the river. 
Determination of Risk Areas in the Cimahi City (Drainage Sector) Based on City Sanitation Strategy Guidelines Iwan Juwana; Elvira Rizqita Utami
Journal of the Civil Engineering Forum Vol. 6 No. 3 (September 2020)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (474.651 KB) | DOI: 10.22146/jcef.53052

Abstract

Cimahi is one of the cities which participated in the Accelerated Habitat Sanitation Development Program in 2011 due to its poor sanitation conditions. The city experienced high flooding in 2018 as observed in the 36.4 hectares or approximately 0.76% of the total area affected even though its drainage system was discovered to be covering 89.87% in 2015. There are also several reports of displacement of residents and significant financial loss in the city due to flooding in the past decade and this means urgent attention needs to be provided to improve the condition of the city. Therefore, this study was conducted to calculate the level of risk from the drainage sector in each urban village of Cimahi City. This involves using scores ranging from 1 – 4, with a score of 1 indicating very low risk while 4 represents very high risk based on exposure factors such as percentage of inundation area, sanitation risk index (IRS) score, and the opinions of local government as well as impact factors such as population, population density, poverty rate, and urban/rural function. The research made use of both primary and secondary data with the primary data obtained through interviews with the population in the study area and local government representatives while secondary data were obtained from different institutions. The results showed 7 out of the 16 urban villages in Cimahi City are in Risk Category 1, 5 in Category 2, 1 in Category 3, and the remaining 2 in Category 4. This information with the risk category map for each village is expected to be used by the local government of Cimahi to analyze the flood-related problems better and create more effective solutions. 
Analisis Willingness to Pay Masyarakat Kelurahan Antapani Tengah Menuju Optimalisasi TPS3R Muhammad Faathir Alhakam; Iwan Juwana
Jurnal Serambi Engineering Vol 4: No. Edisi Khusus (Oktober 2019)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v4i2.1465

Abstract

Central Antapani sub-district is one of the regions in Bandung City that has a reduce reuse recycle waste processing facility, namely TPS 3R Cibatu. There are still problems that cause solid waste management did not run optimally. The manager of TPS 3R Cibatu confirmed that there would be an optimization attempt. But, the limited funds from previous solid waste retribution became a problem to accelerate that solid waste management optimization. The research’s purpose is to analyze Willingness to Pay (WTP) from the community of Central Antapani sub-district in the optimization attempt of TPS 3R Cibatu, because there has not been researched that done the study of the amount of the community’s WTP. The method used is the Contingent Valuation Method (CVM) and bidding game technique. The number of respondents that being interviewed is 160 householders, with the details of 135 householders who are willing to pay and 25 householders who are not. Based on the interview result, obtained the average WTP of Rp. 7.163/month and the total WTP of Rp. 16.079.000/month. Based on the statistical analysis, known that the factors that affected the WTP value’s respondents are educational level and solid waste retribution fund.
Pemetaan Area Risiko Sanitasi Sektor Air Limbah Domestik Kota Cimahi Heksantia Rahmadinda Yasya; Iwan Juwana
Jurnal Serambi Engineering Vol 4: No. Edisi Khusus (Oktober 2019)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v4i2.1450

Abstract

Cimahi is one of developing cities in Indonesia that has sanitation condition with low services, especially in domestic wastewater management. In 2016, the coverage of domestic wastewater services in the city only reached 68.17%. In consequences, some communities discharging their wastewater to the stream. This matter could lead to water pollution that would indirectly affecting public health. Based on these problems, this reserach was carried out to calculate the level of risk in each urban village of Cimahi. The risk level is stated in the form of scores (1-4) with a description of 1 is very low risk; 2 is low risk; 3 is high risk; 4 very high risk. The risk calculation considers the determinants (exposure and impact) which consist of  percentage of wastewater service, risk index, perceptions of related regional organizations, population, population density, poverty rates, and regional categories. The results obtained from the calculation of the risk of domestic wastewater in Cimahi show that the Pasirkaliki, Cibabat, Citeureup, Cipageran, Baros, and Cibeber have a very low risk; Cimahi and Utama are at low risk; Karangmekar, Cigugur Tengah and Cibeureum are at high risk; Padasuka, Setiamanah, Leuwigajah and Melong have a very high risk.
Strategi Peningkatan Pelayanan Persampahan Berbasis 3R di Kelurahan Jatihandap Melalui Penerapan Contingent Valuation Method Muhammad Dimas Zulri; Iwan Juwana
Jurnal Serambi Engineering Vol 5, No 3 (2020)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v5i3.2074

Abstract

The increasing population in Indonesia is directly proportional to the growth of new settlements. In line with this, the growth of waste volume in Indonesia is closely related to the growth of its population. The level of welfare and lifestyle in Indonesia has resulted in a significant increase in waste generation, especially in urban areas. Jatihandap is one of the areas in Mandalajati Subdistrict, Bandung City that increases the influence of waste generation by each people and wants to improve the quality of its waste services to reduce these impacts. One way that can be done to measure the willingness of citizens to improve waste services is to measure the Contingent Valuation Method. Contingent Valuation Method (CVM) Based on the results of this study, WTP values were 138 people from 153 samples selected. The estimated WTP (EWTP) is Rp. 12,971 and the total WTP (TWTP) is Rp. 80,385,000 / month. Based on multiple linear regression analysis, the WTP value of Jatihandap Urban Village is influenced by the amount of garbage contributions and gender equality from the results of the questionnaire that has been done.
Valuasi Nilai Ekonomi Total dari Pemanfaatan Limbah B3 Slag Baja sebagai Bahan Pengerasan Jalan (incomplete) Lydia Suwargana Putri; Iwan Juwana
Jurnal Serambi Engineering Vol 6, No 2: April 2021
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v6i2.2869

Abstract

A common issue is that B3 steel slag waste produced by the iron and steel smelting industry is often dumped into the environment and can  lead to environmental pollution. The hazardous waste management that can be performed  is the use  of B3 steel slag waste as a road paving material. The method of analysis of this research is carried out based on the total economic value then a financial feasibility analysis is carried out using the concept of Cost Benefit Analysis (AMB). The purpose of this research is to identify and classify DUV, IUV, to perform a Total Economic Value assessment, and cost-benefit analysis. The result of the classification of the analysis of the total economic value of this research is the direct use value obtained for an  amount of Rp 2.504.943.750.000, an indirect usege value of Rp 11.285.686.875.000, and the total economic value of Rp 13.790.630.625.000. The Cost-Benefit Analysis (CBA) conducted in this study is financially feasible, because it meets the financial feasibility standards for a project with a NPV value of Rp 4.827.270.437.317, the Net BCR value of 7,78 and the Gross BCR value of 2,02, IRR of 154,2 %, and the Payback Periode of 4 months 3 days.
Co-Authors ABDUL ASIS RUMAKAT Al Madaidy, Ali Bakari, Haroon Diki Prastyo Nugroho Dyah Marganingrum Elvira Rizqita Utami Fionita, Indah Haroon Bakari HASNA, NATASYA Heksantia Rahmadinda Yasya Hidrijanti, Ajeng Alya Lydia Suwargana Putri MEGA PRANADITYA Mochammad Fariq Yogaswara Mohamad Satori Muhammad Dimas Zulri Muhammad Faathir Alhakam NATASYA HASNA PRANADITYA, MEGA PRANADITYA, MEGA Rahayu, Yushi RUMAKAT, ABDUL ASIS Sampe, Hisky Robinson Saputra, Andriansyah Ramadhany Siti Ainun Sundana, Eka Jatnika Sutadian, Arief Dhany Utami, Elvira Rizqita WIBIARIKSA PUTRI Yenita Sandra Sari Yenita Sandra Sari, Yenita Sandra Yogaswara, Mochammad Fariq