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A’in, Churun
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MANAGEMENT OF SEKETAK RIVER, CENTRAL JAVA, INDONESIA BASED ON DETERMINATION OF WATER QUALITY STATUS AND POLLUTION LOAD APPROACH A’in, Churun; Rudiyanti, Siti; Suryanti, Suryanti; Zevriawan, Aldhimas Bagus
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 20, No 3 (2024): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.20.3.100-109

Abstract

Due to the presence of renowned universities, Tembalang, Semarang City, is experiencing rapid development. However, this development not only brings positive impacts but also raises environmental issues, one of which is river pollution. Seketak River, a ±10.5 km long river that has its headwaters in Banyumanik Subdistrict and empties into Diponegoro University's Education Reservoir, is one of the affected areas. This river pollution has the potential to disrupt water quality and aquatic biota life. The source of pollution is suspected to come from domestic, industrial, and livestock waste around the Seketak watershed. Therefore, intensive research was conducted to analyze the status of water quality and pollution load based on point sources. This research aims to provide recommendations for proper management and control of pollution. Data were collected during the transitional season (dry to rainy) using the Pollution Index (IP) method based on the Decree of the Minister of Environment No. 115 of 2003 and the Pollution Load (BP) method. The research involved four sampling points, each representing a pollutant source (industry, settlement, campus, and livestock), with two repetitions. The results showed that the average IP value of Seketak River was in the lightly polluted category, referring to the Class II Quality Standard of PP No. 22 of 2021. In the first repetition, the IP value was 2.87, while in the second repetition it reached 3.26. The Pollution Load Analysis identified 5 variables that exceeded the maximum load including Nitrite, Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), iron (Fe) and lead (Pb). These findings emphasize the importance of integrated management efforts to mitigate pollution in Seketak River. 
VALUASI EKONOMI KEGIATAN WISATA DI HUTAN MANGROVE PASAR BANGGI REMBANG SELAMA MASA PERCONTOHAN COVID-19 Nisak, Yuyun Khoirun; Solichin, Anhar; A’in, Churun
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 18, No 4 (2022): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.18.4.205-210

Abstract

Hutan Mangrove Pasar Banggi, Rembang difungsikan sebagai tempat wisata yang terkenal dengan sebutan “Jembatan Merah”. Sejak September 2021 wisata ini dibuka kembali sebagai wisata Percontohan selama Covid-19. Adanya pandemi tentu akan mempengaruhi sektor perekonomian sehingga perlu dilakukan analisis valuasi ekonominya. Tujuan Penelitian ini adalah mengetahui valuasi ekonomi kegiatan wisata di Jembatan Merah selama masa percontohan dalam kurun waktu September sampai Desember 2021 serta mengetahui daya dukung kawasan tersebut. Penelitian ini bersifat studi kasus, metode analisis data yang digunakan adalah Travel Cost Method (TCM) dan Willingness To Pay (WTP) untuk kegiatan pariwisata, serta Daya Dukung Kawasan (DDK) untuk menghitung daya tampung wisatawan per hari. Penentuan jumlah responden menggunakan metode Slovin, pemilihan responden wisatawan menggunakan accidental sampling, dan responden kunci pengelola menggunakan purposive sampling. Valuasi ekonomi kegiatan wisata di Jembatan Merah selama masa Percontohan berdasarkan TCM adalah Rp2.250.183.933,00 dan total WTP sebesar Rp87.102.800,00. Rata-rata WTP Rp5.680,00, data ini dapat digunakan sebagai acuan pengadaan tiket masuk dan parkir. Daya dukung kawasan yaitu 243 orang/hari, kunjungan wisatawan di Jembatan merah 19.771 (67,78%) belum melebihi DDK (29.139 orang selama masa percontohan) namun sudah melebihi 50% dari aturan. Estimasi valuasi ekonomi selama masa percontohan di Jembatan Merah sesuai dengan DDK yaitu Rp4.275.716.312,00. Covid-19 mempengaruhi nilai ekonomi hampir 50% dari DDK hal ini dikarenakan adanya aturan physical distancing. Mangrove Forest Pasar Banggi, Rembang functioned as a tourism known as the "Jembatan Merah". Since September 2021 this tour has been reopened as a pilot tour during Covid-19. Pandemic will certainly affect the economic sector so it is necessary to analyze its economic valuation. The purpose of this study was to determine the economic valuation during a pilot tourism from September 2021 to December 2021  and area carrying capacity. This research base on case study, with data analysis used is the Travel Cost Method (TCM) and Willingness To Pay (WTP) for tourism activities, Area Carrying Capacity (DDK) to calculate the tourist capacity in a day. Determination of respondents number using Slovin, while the selection of tourist respondents using accidental sampling, and to determine the key respondents as manager is purposive sampling. The economic valuation of tourism activities at Jembatan Merah during the pilot period based on the TCM method was IDR 2.250.183.933 and the WTP method was 87.102.800 IDR. The average WTP IDR 5.680 can be used as a reference for parking and entry fee. DDK is 243 people/day,  tourist visits to Jembatan Merah 19.771 (67,78%) have not exceeded DDK (29,139 people during the pilot tour) but have exceeded 50% from rules.The estimated economic valuation during the pilot period at Jembatan Merah is in accordance with DDK, which is 4.275.716.312 IDR. Covid-19 affects the economic value of almost 50% of DDK, this is due to physical distancing rules
Co-Authors Anhar Solichin Nisak, Yuyun Khoirun Siti Rudiyanti Suryanti Zevriawan, Aldhimas Bagus