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Iwan Juwana

Institut Teknologi Nasional (Itenas) Bandung

Author-ID : 864586

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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Articles

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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

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

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.

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

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