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THE PERFORMANCE ANALYSIS OF IRRIGATION AREA OF CIBENDUNG WEIR OF BREBES REGENCY Zain, Nur Azis; Farhan, Ohan
Journal of Green Science and Technology Vol 1, No 1 (2017): Journal of Green Science and Technology
Publisher : FAKULTAS TEKNNIK UNIVERSITAS SWADAYA GUNUNG JATI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v1i1.1031

Cibendung Weir comprised in the district of Banjarharjo Brebes Center Java, the located approximately less than 50 km from Cirebon and 40 km from Brebes Center Java, and exist some villages such as, Cikakak, Karang Maja, Tiwulandu Village in East and Tonjong, Singkup, Gandol in West.Cibendung Weir have duct the name is Induk Cibendung Weir or named D.I Jangkelok Hilir. At first, the water able to dilute more less 6677ha but in this time only more less 6349ha, the trouble is diversion of the use of land. This Cibendung Weir was built in the years 1901 ? 1904.? The irrigation areas of Cibendung Weir supply six kemantren such as Kemantren Cibendung, Kemantren Bantarsari, Kemantren Losari Hulu, Kemantren Losari Hilir, Kemantren Kubangjero, and Kemantren Rungkang.The purpose of this research is become reference from evaluation performance of the irrigation area in Cibendung Weir by analyzing the physical condition of building although duct in the irrigation area of Cibendung Weir, analyzing of human resource in the irrigation area of Cibendung Weir, analyzing of rain Hydrology in the irrigation area of Cibendung Weir, analyzing of income from Bendung Cibendong, analyzing of the patterns plants in the irrigation area of Cibendung Weir, and analyzing planning plant and the realization of planting in the irrigation area of Cibendung Weir.The method of this research is qualitative method, in which the fission of the problem is explained that subject or the object research based on the facts which used during doing the research in performance of irrigation system and try to make a good relation in deep from the aspects particularly.Based on the build condition in this irrigation area is classified as satisfactory with percentage of damage reached 11,30%. Meanwhile, the duct condition in this irrigation area Cibendung Weir is good classified with percentage of damage reached 8,21%. The condition of organizer in DI Jangkelok Cibendung Weir only available 51 people, while in needed is 67 people with less percentage reached 17,94% so that service toward the duct condition is less completed and have the impact to net condition which less wake or always damaged, this situation should be increased.From the results of the analysis of the ratio of demand discharge with available discharge added effective rainfall in Irrigation Area Jengkelok,Cibendung Weir fulfilled,but many unused discharge it is necessary to modify cropping pattern in orde to maximize the potential of available discharge. The planting realization in 7 years ago in the irrigation area Jangkelok Cibendung Weir? it is less from the planning plant, but in the period of 2011/2012 occurs increased 7,34% and the realization of intensity planting is average 243,77% while the average of planning plan is 268,91% thus the lower plant in productivity in this case since it can?t be done to planting in this wide area.

The Analysis Of Hydrology In Comal River Gunawan, Gunawan; Anwar, Saihul; Farhan, Ohan
Journal of Green Science and Technology Vol 3, No 2 (2019): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY
Publisher : FAKULTAS TEKNNIK UNIVERSITAS SWADAYA GUNUNG JATI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v3i2.2384

This research was conducted to find out the availability of water to the requirements of water and also predict flood plan discharge for return period based on hydrological analysis in Comal River.Calculations are carried out using rainfall data obtained from PUSDATARU of Pemali - Comal from 1999 - 2017.Used the rainstation in the region of Comal Watershed, there are 7 rain stations. Catchment area of rain station used Thiessen Polygon Method to know value of catchment area of each rain station. The Gumbel distribution (Generalized Extreme Value distribution Type-I) is used to model the distribution of the maximum (or the minimum) of a number of samples of various distributions. The calculation of the flood discharge design is using the Nakayasu, Rational, Weduwen, Weduweden, and Haspers method.Based on the result of this research it can be concluded that the biggest water potential occurs in January is 199.60 m3/s and the smallest in August is 0.84 m3/s. Cropping pattern carried out with one year there are three cropping patterns, namely paddy - paddy - secondary crops. For the water requirements, enough can be fulfilled, but in August and September, where the planting period III for the secondary crops experiences a deficit. The method used to design flood discharge is the Nakayasu method. For the embankment construction and normalization is profitable.Keywords: River, Flood, Embankment, Thiessen, Comal ?

Performance Indicators of Basic Infrastructure of Kotaku Program (The City without Slums) Tribhuwana, Awliya; Farhan, Ohan
Jurnal Teknik Sipil dan Perencanaan Vol 22, No 2 (2020): Jurnal Teknik Sipil & Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v22i2.24011

Abstract. Wotgali Village is a slum area. The aim of the current research is to find out the performance of slum base infrastructure using Lakip (Government Agency Accountability Report) of KOTAKU (City without Slums) Program. The first step was performed by identifying the initial settlement (base line), then some treatments on the facilities and infrastructure (finish line), performance evaluation stages of the preparation, planning, implementation, and sustainability stages. The research used qualitative and quantitative approach. Qualitative measurement began with a numerical assessment of the results on the level of regional slum. In addition, quantitative data used the Lakip simulation using results of the KOTAKU program stage performance. Results of the initial condition reach value of 32%. It is categorized as slight slums with an average sectoral slum of 36.68%. Basic infrastructure development which has final technical reached 24% and is included in slight slum with an average sectoral of 27.50%. The performance of LAKIP Kotaku was in preparation phase 90.46% (very good performance), planning stage was 89.93% (very good performance), implementation stage was 90.25% (very good performance), sustainability stage was 85.21% (better performance). Thus, the achievement of KOTAKU program is 85.19% with a range of value of 80-90. The value is included as better performance result. Results of the analysis can be concluded that level of slum can be reduced to 19% (not slum) by creating some improvements to basic facilities and infrastructure. In the following year, involving Lakip Performance, the planning stage can be enhanced through community participation and active involvement.

Analysis of Floating Net Cages on The Carrying Capacity of The Darma Reservoir tribhuwana, Awliya; Muttaqin, Zaenal; Farhan, Ohan
Jurnal Teknik Sipil dan Perencanaan Vol 23, No 1 (2021): Jurnal Teknik Sipil dan Perencanaan
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v23i1.27641

Abstract. Darma Reservoir functions as a reservoir for irrigation, fisheries, and recreational and sports facilities. Currently, it only functions for irrigation and fish farming by floating net ponds. The development of floating net frameworks was so rapid that it conflicted with reservoir management. This study aims to determine the density of the floating net framework of the sedimentation conditions of the Darma Reservoir and to determine the development of the sedimentation rate of the Darma Reservoir in relation to the service life of the reservoir characterized by reduced dead storage. The first step was carried out by surveying the presence of the number of floating net cages, the distribution of the feed, the percentage of feed demand, the carrying capacity of the reservoir, then a topographic survey of the depth of the Darma reservoir to determine the capacity, rate and volume of sediment deposits. This study used quantitative approach, it began with distributing questionnaire forms and measuring the depth of the reservoir. The current condition of floating net cages is 4916 occupying 5.819% of the inundation area of 312.15 ha with an elevation of 712.50 m, while floating net cages are allowed according to the carrying capacity of Darma Reservoir waters amounting to 1,021. tons / harvest while the spawning pond is 3.483 tons/harvest. The volume of normal active storage for elevation 712.50 in 2020 is 28.086 million m3, while the volume of sediment deposits is 9.262 million m3 32.98%, the average sediment rate in the reservoir from 1988 to 2020 is 0.2894 million m3/year, while the sediment rate in catchment area Dam Dharma with an area of 23.5 km2 of 71.873 mm/year. Sedimentation in the Darma Reservoir has exceeded the limit of the base elevation of the reservoir, the elevation of the dead reservoir and the lowest elevation, but the reservoir is still functional. The planning life of the darma reservoir is up to 50 years, the suitability of the initial planning of operations in 1970 with operations until 2020.

Performance Indicators of Basic Infrastructure of Kotaku Program (The City without Slums) Tribhuwana, Awliya; Farhan, Ohan
Jurnal Teknik Sipil dan Perencanaan Vol 22, No 2 (2020)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v22i2.24011

Abstract. Wotgali Village is a slum area. The aim of the current research is to find out the performance of slum base infrastructure using Lakip (Government Agency Accountability Report) of KOTAKU (City without Slums) Program. The first step was performed by identifying the initial settlement (base line), then some treatments on the facilities and infrastructure (finish line), performance evaluation stages of the preparation, planning, implementation, and sustainability stages. The research used qualitative and quantitative approach. Qualitative measurement began with a numerical assessment of the results on the level of regional slum. In addition, quantitative data used the Lakip simulation using results of the KOTAKU program stage performance. Results of the initial condition reach value of 32%. It is categorized as slight slums with an average sectoral slum of 36.68%. Basic infrastructure development which has final technical reached 24% and is included in slight slum with an average sectoral of 27.50%. The performance of LAKIP Kotaku was in preparation phase 90.46% (very good performance), planning stage was 89.93% (very good performance), implementation stage was 90.25% (very good performance), sustainability stage was 85.21% (better performance). Thus, the achievement of KOTAKU program is 85.19% with a range of value of 80-90. The value is included as better performance result. Results of the analysis can be concluded that level of slum can be reduced to 19% (not slum) by creating some improvements to basic facilities and infrastructure. In the following year, involving Lakip Performance, the planning stage can be enhanced through community participation and active involvement.

Analysis of Floating Net Cages on The Carrying Capacity of The Darma Reservoir tribhuwana, Awliya; Muttaqin, Zaenal; Farhan, Ohan
Jurnal Teknik Sipil dan Perencanaan Vol 23, No 1 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v23i1.27641

Abstract. Darma Reservoir functions as a reservoir for irrigation, fisheries, and recreational and sports facilities. Currently, it only functions for irrigation and fish farming by floating net ponds. The development of floating net frameworks was so rapid that it conflicted with reservoir management. This study aims to determine the density of the floating net framework of the sedimentation conditions of the Darma Reservoir and to determine the development of the sedimentation rate of the Darma Reservoir in relation to the service life of the reservoir characterized by reduced dead storage. The first step was carried out by surveying the presence of the number of floating net cages, the distribution of the feed, the percentage of feed demand, the carrying capacity of the reservoir, then a topographic survey of the depth of the Darma reservoir to determine the capacity, rate and volume of sediment deposits. This study used quantitative approach, it began with distributing questionnaire forms and measuring the depth of the reservoir. The current condition of floating net cages is 4916 occupying 5.819% of the inundation area of 312.15 ha with an elevation of 712.50 m, while floating net cages are allowed according to the carrying capacity of Darma Reservoir waters amounting to 1,021. tons / harvest while the spawning pond is 3.483 tons/harvest. The volume of normal active storage for elevation 712.50 in 2020 is 28.086 million m3, while the volume of sediment deposits is 9.262 million m3 32.98%, the average sediment rate in the reservoir from 1988 to 2020 is 0.2894 million m3/year, while the sediment rate in catchment area Dam Dharma with an area of 23.5 km2 of 71.873 mm/year. Sedimentation in the Darma Reservoir has exceeded the limit of the base elevation of the reservoir, the elevation of the dead reservoir and the lowest elevation, but the reservoir is still functional. The planning life of the darma reservoir is up to 50 years, the suitability of the initial planning of operations in 1970 with operations until 2020.

ANALYSIS OF DRAINAGE CHANNEL CAPACITY IN CIREMAI RAYA, LARANGAN SUB-DISTRICT OF CIREBON CITY Akbar Winasis; Ohan Farhan; Heri Mulyono
Journal of Green Science and Technology Vol 5, No 1 (2021): JOURNAL OF SCIENCE AND TECHNOLOGY VOL. 5 NO. 1 MARCH 2021
Publisher : FAKULTAS TEKNNIK UNIVERSITAS SWADAYA GUNUNG JATI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v5i1.4907

The perumnas gunung area is one of the areas in the Larangan sub-district, Harjamukti Subdistrict, Cirebon City, whose drainage system greatly disturbs the activities of the population in Cirebon City because when heavy rain causes the high volume of water in the drainage so that it comes out to the highway and is very disturbing it can also cause congestion.To solve the problem of inundation and flooding, it requires maximum rainfall data, population density data and hydraulic data from direct observation at the research location. From the rainfall data, the intensity of the rainfall is calculated, then the standard deviation is calculated to get the return period value using the Gumble formula. From the calculation of the Return Period, the calculation of the flood discharge is carried out using a rational method and calculating the discharge of the existing channel. Calculation of the capacity of the existing channel discharge is carried out by calculating the discharge of rainwater and discharge of household wastewater.From the calculation of Hydrology and Hydraulics, the value of Rainfall Intensity is 46.632 mm / day, the overall channel discharge = 0.603 m3 / s, the calculation of the total discharge from household wastewater and rainwater discharge for the 2-year return period is 0.0076 m3 / s. . From the calculation results, the authors conclude that the dimensions of the existing canal can still accommodate the flow of rainwater and household wastewater. The solution to overcome flood inundation on Jalan Ciremai Raya, it is necessary to normalize the drainage channel so that the drainage channel can function properly.

ANALYSIS OF THE CARRYING CAPACITY OF URBAN DRAINAGE DIMENSIONS Awliya Tribhuwana; Fathur Rohman; Ohan Farhan
Journal of Green Science and Technology Vol 5, No 1 (2021): JOURNAL OF SCIENCE AND TECHNOLOGY VOL. 5 NO. 1 MARCH 2021
Publisher : FAKULTAS TEKNNIK UNIVERSITAS SWADAYA GUNUNG JATI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v5i1.4954

The rain that fell in the city of Cirebon, especially the drainage on Jalan Pemuda, could not accommodate and drain the water so that it could create puddles on the roads and surrounding areas. Hourly rain intensity, planned flow rate and channel cross-sectional dimensions are the first steps for flood prevention. Hydrological analysis is used to calculate the discharge capacity of the drainage plan. The results were then analyzed the dimensions of the channel, the drainage ability to accommodate the falling rainwater where Qs is bigger than Qp. the channel discharge has not been able to accommodate the Q plan in the channel so that there will be a runoff of 17.759%. So to anticipate runoff, it is necessary to have a channel improvement plan of 33.477%. In addition to channel improvement solutions, arrange and define the boundaries of water storage areas by measuring and mapping boundaries and issuing regulations that prohibit or limit the construction of buildings that can reduce the ability of areas to store and absorb rainwater by referring to the basic building coefficient (KDB) permitted as stated in the RT/RW.

THE PERFORMANCE ANALYSIS OF IRRIGATION AREA OF CIBENDUNG WEIR OF BREBES REGENCY Nur Azis Zain; Ohan Farhan
Journal of Green Science and Technology Vol 1, No 1 (2017): Journal of Green Science and Technology
Publisher : FAKULTAS TEKNNIK UNIVERSITAS SWADAYA GUNUNG JATI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v1i1.1031

Cibendung Weir comprised in the district of Banjarharjo Brebes Center Java, the located approximately less than 50 km from Cirebon and 40 km from Brebes Center Java, and exist some villages such as, Cikakak, Karang Maja, Tiwulandu Village in East and Tonjong, Singkup, Gandol in West.Cibendung Weir have duct the name is Induk Cibendung Weir or named D.I Jangkelok Hilir. At first, the water able to dilute more less 6677ha but in this time only more less 6349ha, the trouble is diversion of the use of land. This Cibendung Weir was built in the years 1901 – 1904. The irrigation areas of Cibendung Weir supply six kemantren such as Kemantren Cibendung, Kemantren Bantarsari, Kemantren Losari Hulu, Kemantren Losari Hilir, Kemantren Kubangjero, and Kemantren Rungkang.The purpose of this research is become reference from evaluation performance of the irrigation area in Cibendung Weir by analyzing the physical condition of building although duct in the irrigation area of Cibendung Weir, analyzing of human resource in the irrigation area of Cibendung Weir, analyzing of rain Hydrology in the irrigation area of Cibendung Weir, analyzing of income from Bendung Cibendong, analyzing of the patterns plants in the irrigation area of Cibendung Weir, and analyzing planning plant and the realization of planting in the irrigation area of Cibendung Weir.The method of this research is qualitative method, in which the fission of the problem is explained that subject or the object research based on the facts which used during doing the research in performance of irrigation system and try to make a good relation in deep from the aspects particularly.Based on the build condition in this irrigation area is classified as satisfactory with percentage of damage reached 11,30%. Meanwhile, the duct condition in this irrigation area Cibendung Weir is good classified with percentage of damage reached 8,21%. The condition of organizer in DI Jangkelok Cibendung Weir only available 51 people, while in needed is 67 people with less percentage reached 17,94% so that service toward the duct condition is less completed and have the impact to net condition which less wake or always damaged, this situation should be increased.From the results of the analysis of the ratio of demand discharge with available discharge added effective rainfall in Irrigation Area Jengkelok,Cibendung Weir fulfilled,but many unused discharge it is necessary to modify cropping pattern in orde to maximize the potential of available discharge. The planting realization in 7 years ago in the irrigation area Jangkelok Cibendung Weir it is less from the planning plant, but in the period of 2011/2012 occurs increased 7,34% and the realization of intensity planting is average 243,77% while the average of planning plan is 268,91% thus the lower plant in productivity in this case since it can’t be done to planting in this wide area.

The Analysis Of Hydrology In Comal River Gunawan Gunawan; Saihul Anwar; Ohan Farhan
Journal of Green Science and Technology Vol 3, No 2 (2019): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY
Publisher : FAKULTAS TEKNNIK UNIVERSITAS SWADAYA GUNUNG JATI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v3i2.2384

This research was conducted to find out the availability of water to the requirements of water and also predict flood plan discharge for return period based on hydrological analysis in Comal River.Calculations are carried out using rainfall data obtained from PUSDATARU of Pemali - Comal from 1999 - 2017.Used the rainstation in the region of Comal Watershed, there are 7 rain stations. Catchment area of rain station used Thiessen Polygon Method to know value of catchment area of each rain station. The Gumbel distribution (Generalized Extreme Value distribution Type-I) is used to model the distribution of the maximum (or the minimum) of a number of samples of various distributions. The calculation of the flood discharge design is using the Nakayasu, Rational, Weduwen, Weduweden, and Haspers method.Based on the result of this research it can be concluded that the biggest water potential occurs in January is 199.60 m3/s and the smallest in August is 0.84 m3/s. Cropping pattern carried out with one year there are three cropping patterns, namely paddy - paddy - secondary crops. For the water requirements, enough can be fulfilled, but in August and September, where the planting period III for the secondary crops experiences a deficit. The method used to design flood discharge is the Nakayasu method. For the embankment construction and normalization is profitable.Keywords: River, Flood, Embankment, Thiessen, Comal

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