Judul: Analisis Debit Sungai Dengan Menggunakan Model SWAT Pada DAS Cipasauran, Banten
Abstrak: Total water demand at non industrial and industrial region in Cilegon is increasing. With its water production capacity of 2,000 lt/s, PT Krakatau Tirta Industri can't fulfill the amount number of demand from all sectors at Cilegon. To cover the shortage of water supply of ±600 lt/s, PT KTI must take more water from Cipasauran Watershed. SWAT model could be use to make a discharge analysis concerning to water supply at Cipasauran Watershed. Input data such as soil characteristics, climate data, landuse, and hydrology data at the area of the watershed were prepared and inputted at the data input file. In SWAT simulation, 4 process were done, i.e. watershed delineation, hydrological response unit (HRU) forming, data process and SWAT simulation, and visualization process. The result showed that the daily and monthly calibration process crossed 84% and 83% with the 95PPU area, with daily and monthly p-factor value of 0.84 and 0.83. Thus, calibrated model result was valid, though R2 and NS value were not satisfied. Using the validated SWAT model, the daily discharge in Cipasauran Watershed was about 0 - 3.309 m3/s, whereas the monthly discharge was 0.648 - 3.266 m3/s. It meaned that daily and monthly water demand of 0.6 m3/s were fulfilled about 98.22% and 100%.
Keyword: 

Judul: Analisis debit dengan menggunakan Model Tangki pada Sungai Cipasauran, Banten
Abstrak: PT. Krakatau Tirta Industri (PT.KTI) merupakan salah satu perusahaan di Kawasan Cilegon yang memasok air bersih untuk sektor industri dan nonindustri dengan kapasitas terpasang sebesar 2.00 m³/s. Permintaan akan pasokan air terus bertambah seiring telah dibangunnya berbagai industri baru di Kawasan Industri Krakatau Cilegon. PT. KTI melakukan berbagai alternatif penambahan air yang memungkinkan untuk menanggulangi kekurangan air baku yang terjadi, diantaranya dengan menambah pengambilan air dari Sungai Cipasauran. Tujuan dari penelitian ini adalah memodifikasi model pendugaan debit Sungai Cipasauran berdasarkan model tangki dan mengetahui ketersediaan air berdasarkan model tangki jersebut. Pelaksanaan penelitian dilakukan dua tahap, yaitu tahap pertama berupa pengumpulan data sekunder, serta tahap kedua berupa tahap analisis. Data yang gunakan untuk proses optimasi adalah data hujan dan debit sungai harian dengan periode Juli 2007-Juni 2008. Hasil optimasi model untuk periode tersebut menghasilkan nilai R sebesar 0.85, Mean Absolute Error sebesar 1.56, Root Mean Square Error sebesar 2.69, dan LOG sebesar 0.11, dan hasil validasi model untuk periode tersebut menghasilkan nilai R² sebesar 0.72. Berdasarkan analisis yang telah lakukan, jumlah debit air yang dapat dimanfaatkan dari Sungai Cipasauran berdasarkan model yang telah dibuat untuk periode Juli 2007-Juni 2008, Juli 2008-Himi 2009, dan Juli 2009-Juni 2010 berturut-turut sebesar 13,412,343 m³/tahman, 9,078,351 m³/tahun, dan 8,713,695 m³/tahun…
Keyword: Cipasauran watershed, tank model, PT. Krakatau Tirta Industri

Judul: Quality of Eggs Based on Different Age of Chickens from Yong's Farm, Seremban, Malaysia
Abstrak: This study aimed to determine the quality of eggs from different ages of chickens from Yong’s Farm, Seremban, Malaysia. The method used was 60 eggs were collected from three of different ages of chicken; 25 (n=20 eggs), 35 (n=20 eggs) and 58 weeks old (n=20 eggs). The variables included egg weight, shell thickness, yolk color, yolk index, albumen index and Haugh unit. The results showed the highest egg weight was recorded with 58 weeks old chicken. The egg shell thickness found at week 25 week (0,455 ± 0,08 mm), 35 weeks (0,495 ± 0,08 mm) and 58 weeks (0,475 ± 0,08 mm). Yolk color was at the highest mean of.12,6 ± 0,68 (25 weeks) while on week 35 and 58 it ranges between 5,45 ± 0,51 and 5,55 ± 0,51. The yolk index was recorded on week 25 and no specific trends were observed and the yolk index was not significant between 35 and 58 weeks of age. Albumen index was highest at week 25 were (0,129 ± 0,0), week 35 (0,113 ± 0,03) and week 58 (0,088 ± 0,02). The highest HU was recorded at week 25 (94,81 ± 5,33) and decreased to (90,52 ± 6,64) at week 35 and (81,95 ± 6,24) at week 58. It can be concluded that chicken influences both exterior and interior quality, except the yolk color with the quality of eggs decreasing as the age increases.
Keyword: chicken age, external quality, internal quality, Haugh Unit