Browsing by Author "Handayani Yohanna Lilis"

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    ANALISIS HUJAN ALIRAN MENGGUNAKAN MODEL IHACRES (Studi Kasus DAS Indragiri)
    (2013-07-16) Wibowo, Ryan Ardhi; Suprayogi Imam; Handayani Yohanna Lilis
    Hydrological phenomena are very complex and difficult to be understood completely, so it needs a simplification in the form of model. IHACRES model is one of the well known rainfall-runoff model that have been successful in investigating the hydrological response of the various watersheds around the world. The existence of this success, it is necessary to research the reliability of the IHACRES model in Indonesia, namely in the Indragiri watershed. This model is calibrated, verified and simulated based on discharge data recording at Lubuk Ambacang station for 10 years (1995-2004) and then validated against discharge data at Pulau Berhalo station. This research was conducted by varying the length of data is grouped into scheme 1 until scheme 8. The research results show that the best scheme in calibration phase is scheme 3 (3 years calibration) with R2 value of 0,8140, while the verification phase, the best scheme is scheme 6 (6 years calibration) with R2 value of 0,5508. In the validation phase using the data in Pulau Berhalo station, scheme 7 (7 years calibration) showed better performance than scheme 3 and scheme 6 with R2 value 0.361 and bias 17.155 mm/year. Overall, the results of this research provide understanding that the success obtained in the calibration phase does not guarantee the success at verification phase.
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    KAJIAN PEMANFAATAN DATA HUJAN SATELIT UNTUK PEMODELAN HIDROLOGI (STUDI KASUS DAS PULAU BERHALO)
    (2013-07-27) Isnaini, Yunan; Sutikno Sigit; Handayani Yohanna Lilis
    Limitations on the completeness and accuracy of the data become the problem to analyzing and to perform hydrological modeling. One attempt to overcome this problem is to use analytics programs satellite rainfall data, it is Integrated Flood Analysis System (IFAS). IFAS program is quite effective and efficient to simplify or approximating of an actual reality hydrological phenomena. This study took place at the sub-watershed Indragiri, Pulau Berhalo. Utilization of satellite rainfall data in this study was simplified in the form of models. The model was simulated and calibrated with rainfall-runoff period from 1 January to 31 December 2004 and was validated with period 1 January to 31 December 2006. Modeling become optimal after the calibration process with the correlation (R) value of 0,65, volume error (VE) of 3,34%, and the coefficient of efficiency (CE) of 1,06. This showed that the model has a substansial realeted with the measured data (0,4 0,75).
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    PENGOLAHAN AIR LIMBAH HOTEL DENGAN METODE FREE SURFACE CONSTRUCTED WETLAND MENGGUNAKAN TUMBUHAN EQUISETUM HYMALE
    (2015-12-11) Ridwan, Mohammad; Darmayanti Lita; Handayani Yohanna Lilis
    Throwing domestic waste water directly to the drainage without treatment had caused the water pollution. The effect of water pollution can disturb the health and water biota. One of simple technology to decrease the pollutant in the water is constructed wetland. This research is aimed to know the effectivity of Free Surface Constructed Wetland with water bamboo (Equisetum Hymale) and peat in processing the hotel waste water. The research used constructed wetland. The quality parameter of water that was tested are pH, COD, TSS. Statistic calculation that was used in this research is one way Anova (Analysis of variance) .The result of the research showed that the constructed wetland with peat and water bamboo (Equisetum Hymale) resulted the highest effeciency in decreasing pH from 8.5 to 6 or 29.41% , COD from 97.7 mg/l to 43 mg/l or 55.98% , and TSS from 447.90 mg/l to 66.00 mg/l or 85.26%. Constructed wetland with the media of peat and without using the plant resulted the highest effeciency in decreasing pH from 8.5 to 6.5 or 23.53% , COD from 250 mg/l to 173 mg/l or 30.8% , and TSS from 447.90 to 79.20 mg/l or 82.32% All result showed that constructed wetland can improve the quality of the waste water.