Hermin Poedjiastoeti
Universitas Islam Sultan Agung Semarang

Published : 4 Documents

Found 4 Documents

International Conference on Coastal and Delta Areas Vol 1, No 2 (2015): the 2th International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Babon River is one of the important rivers in Central Java through the Semarang Regency, Semarang City and Demak Regency. However, the amount of domestic, agricultural and industrial waste dumped into Babon River leads to increased pollution load and decrease in capacity. This study aimed to calculate the pollution load capacity using the Streeter Phelps method with appllied QUAL2Kw program to describing the quality of river water through the profiles of BOD, COD and TSS. And then it was compared with the standard stream due to Government Regulation No. 82/2001 about Management of Water Quality and Water Pollution Control. The study area includes Babon River from upstream to downstream that divided into 8 segments. The simulation BOD’s curve, COD’s curve and TSS’s curve results that maximum pollution load capacity of the Babon River for BOD and COD parameters contained in the segment 8 and the TSS parameter is in segment 2, while for the minimum pollution load capacity for BOD parameter contained in segment 1, COD in segment 6 and TSS in segment 7. The result of simulation due to pollution load capacity uses minimum flow rate is compared with Government Regulation No. 82/ 2001, it indicate that in segment 8 has no capacity for water quality standard class I, II and III with pollution load capacity of BOD ranged 24, 5 kg / day – 54,2 kg / day, and then the pollution load capacity of COD has exceeded the water quality standard class I of 42,1 kg / day, while pollution load capacity of TSS parameter meet the capacity of all classes.Keywords: Babon River, Pollution Load Capacity, Water Quality, QUAL2Kw
Jurnal SPATIAL Wahana Komunikasi dan Informasi Geografi Vol 17 No 2 (2017): JURNAL SPATIAL WAHANA KOMUNIKASI DAN INFORMASI GEOGRAFI
Publisher : Program Studi Pendidikan Geografi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPATIAL.172.1


Changes in land use that occur in the watershed indicate a decrease in water quality one of them in the Garang Hilir Sub watershed . Land use in watershed has a great impact on river water quality. Changes in land cover and land management practices have been considered key factors affecting changes in hydrological systems, leading to changes in runoff and water quality. The objectives of the study were to assess changes in land use, changes in water quality and the linkages between them. The analysis used is land use change and calculation of  Water Quality Index-Garang Hilir River (IKA-SGH). Determination of Water Quality Index of Garang Hilir River (IKA-SGH) using objective analytical approach secondary data of water quality of measurement  from Environmental Agency (BLH) of Central Java Province from September 2002 to June 2014 in 4 (four) monitoring sites in Garang River. Water quality index is done in three stages namely the selection of dominant parameters with the help of Factor Analysis, the weighting of dominant parameters with Analytical Hierarchy Process (AHP) approach is Pairwise comparison and making sub-index graph. The effect of land use change on water quality using quantitative descriptive analysis. The data used to determine the relationship is the average value of the Garang River Water Quality Index (IKA-SGH) and the extent of land use change from 2002 to 2014. In general the quality status of water quality in Garang Hilir River from 2002 to 2014 is in the "Medium" category ( 50.1 - 70) to "Good" (70.1 - 90). The more towards the estuary, the decrease in IKA-SGH value tends to occur in the river segment. Land use from 2002 - 2014 in the study area tends to change widely in each year. The settlements experienced a widespread increase in their use (12%), while irrigated rice fields experienced the largest reduction of area (-77%). The more agricultural land and cultivated land that transformed into settlements and other constructed land such as for industry, shrubs and the increasing of settlements and other wastes (industrial) and open land in Garang Hilir Subwatershed, causing the decrease of water quality of Garang Hilir River.  
Jurnal Lingkungan Sultan Agung Vol 1, No 1 (2012): Jurnal Lingkungan Sultan Agung
Publisher : Universitas Islam Sultan Agung

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Kalasan subdistrict is located in Yogyakarta Special Region, in which its development expands to the north as well as to the east. Kalasan subdistrict is one of the eastern areas ofYogyakartawhich is in the developing process of population, sosial, economics, and culture. These developments affect the domestic water utilization that is analyzed based on the type of job, education level, income level, and the type of water source.The objectives of this research are (1) to recognize the needs of domestic water in Kalasan subdistric in different sosial economic level; (2) to recognize the need of water on the peak hour and the daily maximum utilization; (3) to examine the effect of the water source type on the domestic water utilization for daily use.Methods used in this research include interview to gather data based on stratified proportional random sampling. The data analysis covered the descriptive analysis with cross tabulation and statistic analysis with Multiple Regression, and alsoChi Square. The data gathered are the water use by the member of family, the type of job, education level, income level, and the type of the water source.This research get the result that is: (1). Water utilization per capita in Kalasan Subdistrict have come up to like water utilization in small town specified by Dirjen Cipta Karya Departemen Pekerjaan Umum of equal to 130 litre/capita/day;   (2). Education level in Kalasan Subdistrict have an effect on to domestic water utilization, this matter indicate that the excelsior mount the education, ever greater hence water utilizated, so that mount the high education tend to utilize the water more extravagant; (3). Income level do not have an effect on to domestic water utilization; (4). Domestic water utilization  in Kalasan Subdistrict is not defined by certain type of job; (5). Water utilization  on peak hour in  the morning is 266,73 litre/day, while water utilization on daily maximum is 774,09 litre/day which be at the Sunday, peak hour factor in Kalasan Subdistrict is 1,30 and daily maximum factor is 1,26; (6). Domestic water utilization determined by certain water source type. Keywords  : water utilization, peak hour, and maximum daily water utilization
Penilaian Kerentanan Air Permukaan terhadap Pencemaran di Sub DAS Garang Hilir Berbasis Multi-Indeks Poedjiastoeti, Hermin; Sudarmadji, Sudarmadji; Sunarto, Sunarto; Suprayogi, Slamet
Jurnal Wilayah dan Lingkungan Vol 5, No 3 (2017): December 2017
Publisher : Department of Urban and Regional Planning, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (621.163 KB) | DOI: 10.14710/jwl.5.3.168-180


Assessing the surface water vulnerability to pollution in the Garang Downstream Watershed Semarang requires a study concerned with some environmental components/indicators. Vulnerability measurement through surface water susceptibility index formulation on pollution is important considering the absence of surface water pollution effect indicators in an efficient assessment system. Therefore, a multi-indicator vulnerability assessment on surface water pollution is necessary. The Surface Water Vulnerability Index to Pollution (SWVIP) is composed of five components, namely water quality (WQ), rainfall (R), land use and vegetation cover (LVC), river hydrogeometric (RH) and population (P). Regarding index development, the subindex graphs and the weighting of each component are created. The application of composite index measurement yields an equation of SWVIP = 0.29.WQI + 0.23PI + 0.14RI + 0.20.LVCI + 0.14.RHI and an index value of 73.87 including the "rather high" category that represents the "vulnerable"condition in the Garang Downstream Watershed Semarang. This suggests that the five selected components used in the index creation can provide useful information to decision making in the surface water pollution control.