Judul: Estimasi Nilai Kerugian Ekonomi akibat Pencemaran Air di Waduk Cirata, Wilayah Kabupaten Cianjur, Provinsi Jawa Barat
Abstrak: Cirata Reservoir is one of cascade reservoir which was built by dammed Citarum River’s flow for some purposes, such as hydropower plant, fisheries, and floating cage aquaculture. Cirata Its water quality is declining due to water pollution. This pollution causes economic losses for the users of Cirata Reservoir, those are: floating cage aquaculture farmers, fishermen, and PT. PJB UP Cirata as the management of Cirata hydropower plant. This research aims to identify the respondents’ perceptions about the water pollution use descriptive analysis and to estimate the economic losses which are caused by water pollution in Cirata Reservoir Cianjur Regency in 2013 use economic loss approach and benefit transfer method. Commonly, the respondents understand about the water pollution in reservoir and suffered by it. Based on data analysis obtained that economic loss estimation of floating cage aquaculture is IDR 427,581,110,250.00 (the biggest loss), economic loss estimation of fisheries is IDR 1,176,696,421.00, and economic loss estimation of hydropower plant is IDR 198,418,167,672.67. Therefore, total economic loss estimation due to water pollution in Cirata Reservoir Cianjur Regency in 2013 is IDR 628,175,974,343.67.
Keyword: water pollution., resource damage assessment, economic loss, Cirata Reservoir

Judul: Kerugian Ekonomi PLTA Akibat Sedimentasi dan Peran Kelembagaan Dalam Pengelolaan Waduk Cirata - Jawa Barat
Abstrak: Cirata dam, a man made resource, included in the The Common Pool Resources (CPRs). Trend of CPRs are over use and produce externality. The impact of these externalities are the mass death of fish in pondfish, corrosive plant equipment, decreased production of hydroelectric power and the most important suistainability of dam. At least 3 sectors inside activity which contribute these sedimentation: fisheries, agriculture, and domestic activities. The objective of this study are to estimate which pollutant’s source that contribute to sedimentation by estimating the solid and liquid waste; estimating economic losses of hydropower and analyze appropriate institutional model as the CPRs dam management. Data analysis for estimating economic losses using benefit-cost analysis and for institutional analysis using Dolsak&Ostrom approach. The results showed that the main source of pollution comes from fisheries sector. The contribution from solid waste 742 ton/day and from domestic ativities 58 ton/day. The willingness to pay community for waste management program is Rp25.000/month for fisheries family and Rp6.175,00/month for non-fisheries family. Hydropower losses is Rp11 million comes from 8 years remain life time reservoir. Cost of enviromental improvement is Rp65 million. Institutional analysis showed that management of dam are low enforcement, high demand of dam product, no leading sector for collective action, and there is the political interest. The study emphazed the importance of institutional arrangement for dam suistainability management.
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Judul: Sintesis α-Fe2O3 menggunakan metode sol gel
Abstrak: In this reseach was succeeded make powder α-Fe2O3 with particle size 202.64 nm. Synthesis using Sol-Gel method with SiO2 coating derived from Si(OC2H5)4 at temperature of 750 oC for 5 hours. Characterization XRD prove that sample form is α-Fe2O3 (11 peaks) and β-Fe2O3 (2 peaks) with crystal size 20.69125 nm and crystallization 44 %. The cystal structure of α-Fe2O3 is rhombohedral and β-Fe2O3 is hexsagonal. Optic characterization show that the sample absorbing light at wavelength less than 480 nm. Bandgap energy of the optical characterization measurments is 2.74 eV.
Keyword: α-Fe2O3, annealing, bandgap energy, sol-gel, crystal structure.