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ANALISIS PERMODELAN SUB DAS PADA DAERAH ALIRAN SUNGAI KRUENG PASE KABUPATEN ACEH UTARA Rahmawati Rahmawati; Eldina Fatimah; Masimin Masimin
Jurnal Arsip Rekayasa Sipil dan Perencanaan Vol 2, No 3 (2019): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jarsp.v2i3.13461

Watershed management can be started by evaluation how the response of watershed hydraulic toward rainfall and become run off that will flow downstream. Transformation of rain into flow is a method used to find out effect of land use change and its parameter toward flow hydrograph. Watershed Kr. Pase is one of most rapid reduction of forest area. Land use change occurred in this watershed affecting discharge amount of run off which required further calculation. This calculation using the rational method by calculating rainfall intensity parameter (I),watershed area (A), and flow coefficient (C) in watershed. Data of land use provide in this study are on year 2007, 2013, and 2017 which will examine watershed Kr. Pase into subwatershed model, whereas from map analysis obtained three subwatersheds. After some calculation off run off discharge at watershed Kr. Pase, than it is use sub-watershed with longest concertration time (tc).

PENGARUH KRIB TERHADAP KECEPATAN ALIRAN PADA SUNGAI KRUENG ACEH Sari Rezeki; Eldina Fatimah; Masimin Masimin
Jurnal Arsip Rekayasa Sipil dan Perencanaan Vol 3, No 4 (2020): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jarsp.v3i4.16726

Krueng Aceh River is one of the rivers that has a large discharge crossing two administrative regions, namely Banda Aceh City and Aceh Besar District. One of the problems in Krueng Aceh river, precisely around the area of Pango fly over towards the downstream area is the high flow speed distribution at the turn of the river. The impact of the bridge pillar on the river turn results in changes in the cross section of the river endangering the public facilities in front of it. Based on this analysis, it is necessary to control and secure the river, namely by placing the Groyne. The purpose of this study is to obtain a speed distribution that occurs from placing Groyne construction. The methodology used in this study with hydrodynamic numerical modeling approach is by using the Surface Water Modeling System program (SMS 11.2). Calibrating with the parameter n = 0.025 has obtained an absolute error value of 0.039 in cross 1 and 0.051 in cross 2. Based on the analysis of 20 scenarios with 7 m and 9 m distance variations, 5-unit and 3-unit Groyne variations, and the variations in perpendicular angle and 10°, 30° (degrees) towards the downstream and the upstream area, as well as the flow speed with the same number of Groyne and distance variations, the result shows that (V7 m V9 m à 5 unit) and (V7 m V9 m à 3 unit). The simulation results show that the more the number of Groyne there are, the more negative the impact on the downstream area becomes, the more narrow the Groyne, the higher the flow speed value increases. From the 20 scenarios, we obtained a Groyne scenario that is in accordance with the field conditions, namely the Groyne scenario with a distance of 7 m, 3-unit cribs, and a Groyne placement angle of 30° towards upstream area (GUb3L7). The result of the velocity distribution observation shows that the scenario of GUb3L7 Existing (without pillars)

KAJIAN KERUGIAN RISIKO BANJIR PADA SUNGAI KRUENG MEUREUBO Ahmad Zikra Jumhasla Putra; Masimin Masimin; Eldina Fatimah
Jurnal Arsip Rekayasa Sipil dan Perencanaan Vol 1, No 2 (2018): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jarsp.v1i2.10966

Krueng Meureubo River is one of the big river through the West Aceh district. Krueng Meureubo River has a length of ± 188 km and a catchment area of 1.632 km2. The aims of this study is to conducting inundation and the value of losses caused by floods in Krueng Meureubo river. The scope of this study includes analysis of rainfall plans, flood discharge plans, and the value of losses caused by floods. Based on data processing at 4 (four) rain stations, the annual maximum annual rainfall is obtained at each station for 10 years. Analyzing the frequency of rainfall data plan is by using several distributions, namely: Distribution Distribution Gumbel Type I, Distribution Distribution Log Pearson Type III, Distribution Normal Distribution and Distribution Log Normal. The results of the distribution test analysis to estimate the magnitude of the flood discharge with a certain repeat period, the rainfall data is closer to a distribution, calculation of Distribution and Smirnov-Kolmogorof test of each station to produce a rainfall plan. Based on the result of the test by using Smirnov-Kolmogorof test shows the suitable distribution is following the Log Pearson distribution III. Analyzing the estimated flood discharge on the Krueng Meureubo catchment area determine with a 2-year, 5-year, 10-year, 25-year, 50-year and 100-year re-period. The peak flood discharge estimated by using Hidrograf Satuan Sistetis (HSS) Gama I. The inundation area is obtained from the height of the flood from the cross section of the Krueng Meureubo river. The cross section used in this study is the cross section of KN 7 located in Rundeng village, Johan Pahlawan sub district. The value of losses due to floods that occur when the discharge of Q100 year (1,516 m3 / s) is Rp468.098.453.000, - which consists of loss of damage to residents settlements and rice fields.

KAJIAN POLA CURAH HUJAN DURASI PANJANG TERKAIT DENGAN WAKTU KEJADIAN BANJIR DI KABUPATEN ACEH UTARA Azwar Azwar; Ella Meilianda; Masimin Masimin
Jurnal Arsip Rekayasa Sipil dan Perencanaan Vol 4, No 1 (2021): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jarsp.v4i1.16723

North Aceh Regency almost every year experiences flooding due to heavy rains, both due to rain in the area and flooding of shipments due to heavy rains in neighboring districts namely Bener Meriah. Judging from the time of the incident, heavy rains always occur in the final months of each year. The duration of rainfall is two, namely: (a) short duration and (b) long duration. The second limit is the duration of rain 24 hours (1 day), so that the duration of rainfall is long if the time of occurrence is longer than 24 hours. For tropical climates such as the Aceh region known to experience two seasons, namely: a) the rainy season and b) the dry season in terms of climatology, the rainy season is identical to the occurrence of flooding. The dry season or rainy season are related to the time of year, for example the flood season occurs in the final months of each year, the dry season occurs in the middle of the year, especially for the North Aceh region. The objectives of this study are (a) to obtain information on the relatively heavy rainfall distribution pattern for long duration rainfall events, namely 1-day, 3-day, 5-day and 7-daily. (b) Knowing the timing of flood events is calculated based on the movement of the sun. The data used is daily rainfall data obtained from the Lhokseumawe Meteorological Station from 1986 to 2016. The results of the analysis are to find out the maximum rainfall for 1-day, 3-day, 5-day, and 7 daily. Because what was investigated was the pattern of rain, the partial series method was used, namely the possibility of some data being taken in one year. The results of processing data show that the highest incidence of 1-day maximum rainfall occurs in the IV quadrant or week 52 which is equal to 45.9%, in this case the highest number of flood events will occur when the sun moves towards the south. To identify heavy rain events that can cause flooding based on station rainfall data correlated with debits recorded on AWLR (Automatic Water Level Recorder). From the results of the identification that there was an increase in river discharge in November and December.

STUDI EROSI DAN SEDIMENTASI PADA SUB-DAS KRUENG KEUREUTO KABUPATEN ACEH UTARA Bayu Agustian; Masimin Masimin; Azmeri Azmeri
Jurnal Arsip Rekayasa Sipil dan Perencanaan Vol 1, No 1 (2018): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jarsp.v1i1.10363

The changing of land use within a watershed area causes erosion and sedimentation. Soil erosion within the watershed is controlled by the climate, nature of the soil, topography, vegetation and human activities. The loose soil materials in the runoff flow result in sedimentation from which the capacity of a built dam is reducing. The research area of this study is sub-watershed of Krueng Keureuto. This sub-watershed provides water as well as soil sedimentation to Keuruto Dam. This research aims to determine the rate of erosion and sedimentation within the sub-watershed of Krueng Keuruto in Aceh Utara District. Revised Universal Soil Loss Equation (RUSLE) model and Modified Universal Soil Loss Equation (MUSLE) model integrated into GIS were used to get the picture of spatial erosion and sedimentation at the investigated site. This research estimated the rate of erosion at the sub-watershed of Krueng Keuruto as much as 1,127 ton/ha/year or 25.684,87 ton/year. The sedimentation shows continuously building up. Annual sedimentation yield (As) is approximately 2.868,94 ton/year.

PENGARUH JUMLAH KRIB TIPE ZIGZAG TERHADAP KECEPATAN ALIRAN PADA SUNGAI KRUENG ACEH Suryati Suryati; Eldina Fatimah; Masimin Masimin
Jurnal Arsip Rekayasa Sipil dan Perencanaan Vol 3, No 4 (2020): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jarsp.v3i4.16727

The velocity at the inner turns of the Krueng Aceh river which is ± 100 meters from the Pango Bridge results in the collapse of river banks and endangers public facilities. For this reason, it is necessary to design a construction to protect the river bank. One of the alternatives is to use groyne construction. This study simulated the gropozag type groyne as an alternative form of groyne to be installed in the field. The aim of the study is to see the effect of gropozag type groyne on the river speed using the Surfacewater Modeling System (SMS) program to predict the direction of flow after the installation of the crib. Calibration is performed by determining the relative error value using velocity measurement data. This study uses gropozag groyne type with a length of 2,47 m (6 % B), 3 perpendicular groyne formation placements with an inclination of 10o,20o and 30o towards the upstream and the downstream area in 2 variations, namely 5-unit groynes and 3-unit groynes. The results shows that the RMA2 model obtained results that are close to the measurement value, where the value of the relative error obtained is 7.74% in cross 1 and 6.27% in cross 2. The lengthwise analysis of maximum velocity of 5-unit groynes shows that the maximum velocity occurs at V3 of 4,029 m/sec in the KRA5 formation (10o inclined to downstream of 5 units). Maximum speed of 3-unit groynes at V3 with KTA3 formation (3 perpendicular units) is 3,612 m/s. The number of groynes installed also affects the velocity of the simulation results. The velocity of the 5-unit groynes series is greater than that of the 3-unit groynes series.

PENGARUH VEGETASI TERHADAP TAHANAN ALIRAN PADA SALURAN IRIGASI I.E. Sulastri Sihotang; Eldina Fatimah; Masimin Masimin
Jurnal Arsip Rekayasa Sipil dan Perencanaan Vol 2, No 2 (2019): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jarsp.v2i2.13210

Irrigation channel in D.I. Timbang Deli, Deli Serdang district Sumut province has a total area of 520 Ha and a 5000 meter long secondary channel. Irrigation channel in D.I. Timbang Deli overgrown vegetation at the base and wall of the channel so it is expected to affect roughness. The objective of the study was the flow resistance with the variation of vegetation volume to the variation of the discharge. The method used in this study is field observation by measuring flow velocity, flow depth and vegetation volume (VT) on trapezoidal tract width of 3.75 m and height of 0.90 m along 154 m. Measurements were performed on 3 points of upstream, middle and downstream channels and 5 transverse dots X1 through X5 4 times with D1 debit variation of 1.32 m³/s and D2 of 0.98 m³/s. The dominant vegetation channels are rigid. Measurement velocity using current meter while for vegetation volume (VT) using grid method. The results showed that vegetation volume VT0 (0,00 m³/0,00%), VT1 (52,417 m³/21,14%), VT2 (70,7921 m³/24,51%) and VT3 (83,053 m³/30,42%). It is seen that the increase in vegetation volume can affect the flow resistance. The result of measurement increased the resistance of flow to VT0 0,052, VT1 equal to 0,062 with percentage 16,13%, VT2 equal to 0,108 with percentage 51,85% and VT3 equal to 0,122 with percentage 57,37% atD1. Meanwhile, at D2 there is an increase of flow resistance to VT0 by 0,044, VT1 is 0,052 with percentage 15,38%, VT2 equal to 0,058 with percentage 24,14% and VT3 equal to 0,070 with percentage 37,14%. This shows that the flow resistance VT0 is smaller than the flow resistance VT1, VT2 and VT3. From the above results are expected to conduct O and P channels by surrounding communities and related government.

PERUBAHAN KECEPATAN ALIRAN AKIBAT VARIASI VOLUME VEGETASI DI BELOKAN SALURAN IRIGASI Muhammad Nasir; Eldina Fatimah; Masimin Masimin
Jurnal Arsip Rekayasa Sipil dan Perencanaan Vol 2, No 2 (2019): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jarsp.v2i2.13211

D. I Timbang Deli is 520 Ha of flow area and 5000 meters of secondary channel is located in Deli Serdang Regency, North Sumatra Province. The turn of the irrigation network in overgrown vegetation on the cliffs and bottom of the channel, is expected to reduce the flow rate. The purpose of the study was to see the distribution of velocity, resistance and energy loss in the secondary channel due to vegetation. The method used is conducting surveys in the field by measuring water depth, vegetation volume and flow velocity. Trapezoidal channel with 36 m length, 1.45 lower width, 3.15 m upper width and 33,510 turn angle. The velocity measured in the middle and downstream regions across the channel is divided from points X1 to X5 with Q1 = 0.62m3/ sec and Q2 = 0.83 m3/sec. The results obtained in the speed distribution in Q1 Vmax mean X1 = 0.296 m/s and X5 = 0.199 m/s, the speed decreases due to the turn of 48.82%. On VV3 Vmaks the average is X4 = 0.216 m/sec and (X1 and X2) = 0,000 m/sec, the volocity decreases due to the presence of vegetation between X1, X2 and X5 at Q1 = 100%. In Q2 the average VV0 Vmax condition of the flow X1 = 0.477 m/s and X5 = 0.323 m/s between X1 and X5 the volocity decreases due to turn 28.45%. VV3 Vmax conditions on average X5 = 0.312 m / s and X1 = 0.000 m / s, between X1 and X5 the speed decreases due to the presence of 100% vegetation. In connection with the above results, with this research the local community and local government can carry out cleaning on the channel on a scale basis.

TINJAUAN EFISIENSI SALURAN IRIGASI PADA JARINGAN UTAMA DAERAH IRIGASI KRUENG TUAN KABUPATEN ACEH UTARA Teuku Johan Maulana; Ella Meilianda; Masimin Masimin
Jurnal Arsip Rekayasa Sipil dan Perencanaan Vol 3, No 2 (2020): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jarsp.v3i2.16565

Irrigation Network Krueng Tuan North Aceh Regency was built in 1994 with 11,150-meter primary channel that is planned can irrigate paddy fields potential 2,226 ha. The Krueng Tuan irrigation area has enormous potential as a food granary, but the irrigation discharge to irrigate rice fields was reduced due to a decline in the functioning of facilities in the Krueng Tuan irrigation network considering the age of buildings that were already age-consuming. This condition can result in an increase in water losses that affect the efficiency of irrigation in the channel. The method used to analyze the efficiency of irrigation channels using the inflow-outflow method. The data were recorded about cross-section dimensions of the channel and measuring flow velocity using the current meter. The results of the efficiency analysis show that there are four primary channel sections was under the theoretical efficiency values, namely the measurement section BT-02 - BT-03 at 88.729%, where water losses are caused by the influence of the physical conditions of the channel on the wall and the bottom and wild leads from the channel using the pump house. Other sections are BT-06 - BT-07 at 80.378%, BT-07 - BT-08 at 73.975%, and BT-08 - BT-09 at 67.094%. Water losses on all channels are caused by the physical condition of the channel that has been damaged in the channel wall and leakage due to the rat hole so that water seeped out of the channels.

KAJIAN KINERJA SISTEM IRIGASI DI DAERAH IRIGASI PANDRAH KABUPATEN BIREUEN Winardi Winardi; Azmeri Azmeri; Masimin Masimin
Jurnal Arsip Rekayasa Sipil dan Perencanaan Vol 3, No 2 (2020): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jarsp.v3i2.16566

The Pandrah Irrigation Area is a technical irrigation network whose water source comes from the Krueng Pandrah river. Pandrah Weir was built in 1987 located in Samagadeng Village, Pandrah District, Bireuen Regency. It has an area of 1,203 hectares of irrigated rice fields. In its development, the damage that occurs in the Pandrah irrigation area also cannot be ignored. It is necessary to review it by assessing the performance of the irrigation system. The purpose of this study was to determine the performance index of the Pandrah irrigation system using the MASSCOTE (Mapping System and Service for Canal Operation Technique) method approach. The assessment of the performance index of the Pandrah irrigation system using the MASSCOTE method approach is carried out by evaluating the Rapid Appraisal Procedure (RAP) on four main indicators, namely service indicators, indicators for Farmers Using Water (P3A), indicators for the operator's Human Resources (HR). In the evaluation of the RAP, it is the value of observations of the respondents of OP officers and P3A farmers who are presented in a questionnaire to cross-assess each respondent in irrigation management. The results of the research on the performance appraisal of the Pandrah irrigation system based on the MASSCOTE method with RAP evaluation showed that the performance index of the absolute value (Level of Service) was 3.05. Hence, the performance index of the Pandrah irrigation system in the existing conditions was in the Good classification. This index and classification value shows the value of irrigation operations in fulfilling services from irrigation management carried out by operators / OP officers and felt by irrigation service beneficiaries, namely P3A farmers.

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