Bambang Istijono
Universitas Andalas, Civil Engineering, Faculty Member
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Earthquake-induced liquefaction, which turns the soil to liquid from solid, can cause substantial lateral movement to the ground surface. It has detected the potential liquefaction due to earthquakes in WestWest Sumatra is very high. The... more
Earthquake-induced liquefaction, which turns the soil to liquid from solid, can cause substantial lateral movement to the ground surface. It has detected the potential liquefaction due to earthquakes in WestWest Sumatra is very high. The most problems due to liquefaction are loss of stability and significant settlements. For particular infrastructure such as railway, liquefaction has a considerable influence on the railway embankments. Then, it needs to be investigated whether the railway corridors are built in areas with a high potential of liquefaction. The analysis method used in this research is by comparing railway corridors against the Map of West Sumatra liquefaction potential. This study presents the most railway corridors in West Sumatra that were built in areas with having the liquefaction potential. For the corridors which may be potentially destroyed by liquefaction, special treatment must be applied to them.
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The Kuranji watershed is one of the watersheds in the city of Padang, which is currently experiencing development due to rapid population growth. This has resulted in land conversion from areas that have vegetation to built areas such as... more
The Kuranji watershed is one of the watersheds in the city of Padang, which is currently experiencing development due to rapid population growth. This has resulted in land conversion from areas that have vegetation to built areas such as settlements. This affects the balance of the Kuranji watershed ecosystem and can lead to geological disasters. Therefore an initial analysis is needed in the development of the Kuranji watershed in the future. This study aims to analyse the interrelation of rainfall and morphometric characteristics that have an impact on geological disasters. The data used are data of maximum rainfall and maximum river discharge in the Kuranji watershed from 2009 - 2018. DEM data (30x30) used to calculate morphometric aspects, consisting of linear aspects, area aspects and relief aspects. The calculation of these aspects is done by a Geographic Information System (GIS) approach using ArcGIS 10.6 software. The result shows that the Kuranji watershed has an area of 22...
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The earthquake on February 25, 2022, in West Pasaman resulted in damage to people’s houses as well as fatalities. The quake happened just under the Mount of Talamau, 18 km northeast of the city of Simpang Empat City, with a magnitude of... more
The earthquake on February 25, 2022, in West Pasaman resulted in damage to people’s houses as well as fatalities. The quake happened just under the Mount of Talamau, 18 km northeast of the city of Simpang Empat City, with a magnitude of 5.2 M. This earthquake was followed by small earthquakes that occurred until February 27, 2022. Damage to houses in the earthquake-affected area became the focus of attention in this research to assess the housing vulnerability related to the earthquake hazard. The vulnerability assessment of house buildings is critical in earthquake-prone areas because it can provide information about the impacts on the buildings. The vulnerability of house buildings is closely related to the potential for damage due to earthquake hazards. The benefit of the vulnerability assessment of house buildings is to arrange the mitigation action plan to reduce the level of damage to building structures. The method, in turn, can reduce the number of fatalities as well. Buildings with a high level of vulnerability to earthquakes are non-engineered or residential buildings that are built without considering essential factors in planning, such as the necessary technical requirements.
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Construction Workers play an important role in attaining a good construction and safe building. However, it has not been getting enough attention to the importance of worker’s roles since it is assumed that engineer has already enough... more
Construction Workers play an important role in attaining a good construction and safe building. However, it has not been getting enough attention to the importance of worker’s roles since it is assumed that engineer has already enough knowledge to control and supervise the construction workers. Based on the survey conducted Disaster Study Center of Andalas University after September 30th, 2009 earthquake, it was found that generally houses in West Sumatera were constructed without the involvement of engineers. The buildings constructed based on the workers experience and knowledge only. Also, more than 95% workers in West Sumatera have lack of knowledge about the earthquake-safe house requirements and retrofitting of damaged houses. The basic knowledge of construction for workers is needed to reduce the victims in case of damaged houses during the earthquake. In this Study, the expert team who understand the aspects of the earthquake-safe house and retrofitting did training for local people and construction workers in Padang Sarai, Padang City and Kurai Taji, Padang Pariaman District. The training provides all activities that support the whole construction process of earthquake-safe house, including the retrofitting method for unreinforced masonry houses using ferrocement layers, which is presented by slides presentation and practice on the field. Evaluation of this program was carried out by pre-test (before training) and post-test (after training). The result of training program shows that the knowledge of local people and construction workers on requirements earthquake-safe house and retrofitting method using ferrocement layer improved significantly. The construction workers understood to how to build their own earthquake-safe house and retrofit the damaged houses. This training program is an effective way in disaster risk reduction to prevent the damage to houses due to the earthquake.
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Padang City is one of the metropolitan cities in West Sumatra Province and has six (6) watersheds, one of which is the Batang Kuranji watershed. Over the last few years Batang Kuranji watershed has experienced significant infrastructure... more
Padang City is one of the metropolitan cities in West Sumatra Province and has six (6) watersheds, one of which is the Batang Kuranji watershed. Over the last few years Batang Kuranji watershed has experienced significant infrastructure and urban development which began with the massive earthquake of 30 September, 2009 with coastal communities, afraid of being affected by larger aftershocks having the potential of a tsunami, moving to the upper watershed. As a result, the type of land cover that was originally an infiltration area has been changing into a runoff area. The Batang Kuranji channel with a discharge (Q25) 870 m3/s may not be able to accommodate the change in discharge which can lead to flooding. This paper aims to determine changes in discharge that occur due to changes in land cover and to analyse whether the use infiltration wells and retention pond can reduce the flooding volume. Two methods to calculate runoff discharge were adopted, HEC-HMS 4.1 Modelling and Nakayasu. It was found that the peak discharged increases to (Q25) 1,037.60 m3/s. Thus, creating retention pond with a dimension of 35 hectare with a depth of 5 m and 34,246 infiltration wells can reduce the flood risk. The percentage of runoff discharge they can accommodate is 90.98% and 9.02% respectively.
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The West Sumatra beach is very beautiful and has much diversity in terms of their natural properties. This paper elaborating the diversity of the West Sumatra Beach related to their abrasion potential. Field investigation conducted to... more
The West Sumatra beach is very beautiful and has much diversity in terms of their natural properties. This paper elaborating the diversity of the West Sumatra Beach related to their abrasion potential. Field investigation conducted to collect the nature diversities such as the plantation, sands and the geometric. The sand samples have been taken from beaches and brought to the laboratory to investigate their physical properties. The geometric of the beaches were analysed to gain the specific parameter which are comparable each other. The special study on the role of vegetation on abrasion protection as well as numerical modelling of their mechanism also had been studied and reviewed in this study. Those diversities then are turned into the engineering parameter and linked each other to gain their relation to abrasion potential. This study than can redraw the relation between the physical soil properties as well as the beach geometric with the abrasion potential of the beaches. The p...
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Up to the end of year 2012, along Batang Kuranji River - Padang had occurred several times a flash flood. In addition to the loss of material and psychological trauma to the people of city of Padang, this flood also caused a decline in... more
Up to the end of year 2012, along Batang Kuranji River - Padang had occurred several times a flash flood. In addition to the loss of material and psychological trauma to the people of city of Padang, this flood also caused a decline in the riverbed and eroded the river bed and the river embankment. The Batang Kuranji River, which has a length of more than 27.4 km, has 202 km2 of watershed in Bukit Barisan, which is suffer from damaged along its flow from upstream to downstream. The disaster in Batang Kuranji is paid the serious attention from the government, it can be seen through the construction of several check dams and 2 groundsill with costs of over 238 billion rupiah in a few years. One of the groundsill built on a river bed close to the residential area in the Pilla Tarok area was completed in 2016. However, in line with the completion of Groundsill, the community around the upper reaches experienced a disturbance in the form of vibrations felt in their homes which was report...
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COVID-19 started in China and then spread to other countries. The Indonesian government officially announced the first case of COVID-19 on 2nd March 2020. Previously, on 4th February, the Ministry of Health issued a Decree of the Minister... more
COVID-19 started in China and then spread to other countries. The Indonesian government officially announced the first case of COVID-19 on 2nd March 2020. Previously, on 4th February, the Ministry of Health issued a Decree of the Minister of Health number HK.01.07 of 2020 regarding “Determination of Novel Coronavirus Infection (2019-Ncov Infection) as a Disease That Can Cause Outbreaks And Efforts to Overcome it”. WHO then declared COVID-19 as a pandemic on 11th March 2021. After that, the central government issued various regulations related to the handling of COVID-19. This paper aims to study the regulations issued by the Indonesian government regarding the handling of COVID-19. The research method uses a content analysis method using nVivo software. The study results show that the regulations are quantified, consisting of 30% related to social, 10% related to the budget, 25% related to health, 20% related to COVID-19 handling organizations, and 15% related to economic recovery. ...
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During the covid 19 pandemic, development, and economic growth were hampered, so the people’s purchasing power decreased. To overcome this, especially in rural areas, the government combined the P3-TGAI Program (the Acceleration for... more
During the covid 19 pandemic, development, and economic growth were hampered, so the people’s purchasing power decreased. To overcome this, especially in rural areas, the government combined the P3-TGAI Program (the Acceleration for Irrigation Water Usability Improvement) and the PKT (Cash for work) Program in empowering the community in one way to recovery community income due to the covid pandemic 19. This article presents the P3-TGAI program as an implementation of community-based engagement in empowering communities. P3-TGAI is part of the PKT Program in Padang City and Padang Pariaman District, during the covid pandemic 19, including the covid protocol 19, which was carried out during the project work. This research uses a literature review method to describe the P3-TGAI and PKT program. Descriptive statistics are used to identify the benefits of the programs for the community and the covid 19 protocol performed during project work. The results of the study were that, although ...
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Irigasi mempunyai dampak yang sangat besar terhadap pemenuhan kebutuhan air untuk sawah-sawah. Irigasi yang baik perlu di perhatikan manajemen operasional dan pemeliharaan irigasi agar dapat memenuhi kebutuhan air untuk sawah-sawah... more
Irigasi mempunyai dampak yang sangat besar terhadap pemenuhan kebutuhan air untuk sawah-sawah. Irigasi yang baik perlu di perhatikan manajemen operasional dan pemeliharaan irigasi agar dapat memenuhi kebutuhan air untuk sawah-sawah penduduk. Untuk mengukur debit saluran irigasi Batang Hari, digunakan alat ukur Currenmeter dan diperoleh hasil pada saluran pembawa utama 12,63 m3/dt, Saluran Induk pada Bangunan Batang Hari (BBH-1) 10,39 m3/dt, sekunder Siguntur 0,81 m3/dt dan total 3 tersier 0,46 m3/dt), Kemudian Saluran Induk pada Bangunan Batang Hari-12 (BBH-12) 7,79 m3/dt, sekunder Koto Padang, 0,76 m3/dt, total 2 tersier 0,51 m3/dt, dan Saluran Induk pada Bangunan Batang Hari 28 (BBH-28) 4,93 m3/dt, sekunder Siat 0,88 m3/dt, dan total 3 tersier 0,72 m3/dt). Pada Bangunan Batang Hari 1 (BBH-1) saluran tersier dengan luas 1308 ha, dengan kebutuhan air sebesar 1,604 m3/dt, sedangkan ketersediaan air hanya 0,460 m3/dt. Pada Bangunan Batang Hari 12 (BBH-12) saluran tersier dengan luas...
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Pengalaman di Negara-negara yang telah maju menunjukkan bahwa konsep "TECHNOPARK" sudah teruji kebenarannya dalam kontek mendorong Percepatan Menumbuhkembangkan industri dan bisnis terutama untuk yang skala kecil dan menengah di... more
Pengalaman di Negara-negara yang telah maju menunjukkan bahwa konsep "TECHNOPARK" sudah teruji kebenarannya dalam kontek mendorong Percepatan Menumbuhkembangkan industri dan bisnis terutama untuk yang skala kecil dan menengah di daerah-daerah sampai wilayah perdesaan.
The synergy between central and local governments, between the governments and the business community, or among adjacent regions are crucial to increasing the potential for regionally based tourism development. One of the primary keys for... more
The synergy between central and local governments, between the governments and the business community, or among adjacent regions are crucial to increasing the potential for regionally based tourism development. One of the primary keys for developing decent tourism industry is fulfilling the convenience of visitors (tourists), which may be achieved with friendly culture and societies, and reliable infrastructures between tourist destinations. West Sumatra Province has been known for rich cultures and beautiful landscapes. However, those does not help to attract tourists and the province has not yet become one of main tourist destination in Indonesia. Furthermore, there is a decline in tourists arrival in West-Sumatra, by 13.2% in 2015. It indicates that there are obstacles and challenges in the tourism industry in West Sumatra Province. To support the industry, this study has an aim to determine the capacity of infrastructures for tourism in West Sumatra. Several discussions with loc...
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The Liquefaction Potential Assessment in a Sosil deposit is an Important aspect of earthquake engineering practice since its contributtion to the safety of construction. The Physical properties of sand oil that include grain size and... more
The Liquefaction Potential Assessment in a Sosil deposit is an Important aspect of earthquake engineering practice since its contributtion to the safety of construction. The Physical properties of sand oil that include grain size and density had known give effects to the liquefaction resistance. Those Physical Properties of sand oil associated to liquefaction resistance have been studied in laboratory. The new method as a results of that study is demonstrated here to assess the liquefaction potential. The example case i a real construction design of reclamation hore in order to develop a new port in Medan, Indonesia. Since the limitation of reclamation source mterial, it founds that the gradation of the ready user materils are suspect to liquefaction. Then, using the new methods, the solution to treat those material as part of the construction requirement. The treatment to be accomplished is compaction efforts to reach a certain relative density in order to avoid the possibility of ...
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Development of transportation infrastructure in the region aims to meet the needs of the community to facilitate mobility of people, goods, and services. However, the work of transportation infrastructure requires a large amount of cost... more
Development of transportation infrastructure in the region aims to meet the needs of the community to facilitate mobility of people, goods, and services. However, the work of transportation infrastructure requires a large amount of cost while the development budget is limited. Therefore, a careful determination of the priority of road handling is urgently required. In this study, an analysis was conducted to determine the priority of handling strategic roads in Tebo Regency. This study uses the Analytic Network Process (ANP) method with 4 (four) criteria to determine the priority of road handling, namely: engineering, economics, regional potential, and policies. It was found that National Road - Pintas being the first priority with a weight of 0.252, then the second priority for National Road - Lubuk Mandarsah with a weight of 0.23.The third priority is Unit I Rimbo Bujang - Unit XI Rimbo Ulu Road with a weight of 0.211.
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Coastal regions are vulnerable to erosion and depletion of land areas for human habitation and economic activities. A description of various types of the hydraulic structures associated in erosion protection applications are provided.... more
Coastal regions are vulnerable to erosion and depletion of land areas for human habitation and economic activities. A description of various types of the hydraulic structures associated in erosion protection applications are provided. Recently, because of the shortage of natural rock, traditional forms of river and coastal structures have become very expensive to build and maintain. Therefore, the materials used in hydraulic and coastal structures are changing from the traditional rubble and concrete systems to the cheaper materials and systems. Erosion problems in coastal zones are become increasingly serious due to the development of artificial activities related to the expansion of city functions, industrial complexes and harbour facilities, as well as the removal of sea sand for use in aggregate resources at the construction sites, which is a major factor in the inflow and outflow of sea sand. In addition, the environmental and economical importance of the coastal beach zones is...
Research Interests: Geology, Coastal Hazards, Coastal Erosion, Erosion, Storm surge, and 4 moreBreakwater, Shore, Cliff, and Rubble
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Land cover change is a strategic issue in the Subwatershed of Danau Limau Manis. The community was triggered by the big earthquake of September 30, 2009, so people moved to the upper watershed. The problem is the increasing number of... more
Land cover change is a strategic issue in the Subwatershed of Danau Limau Manis. The community was triggered by the big earthquake of September 30, 2009, so people moved to the upper watershed. The problem is the increasing number of people, the damage to the watershed ecosystem. This damage can be seen from the erosion of river water and the availability of river water during the rainy season and dry season. An appropriate solution is needed to reduce erosion by modeling land cover. This study aims to determine the value of soil erosion and peak discharge. Erosion using a rational formula using the modified universal soil loss equation model based on land units and peak discharge. The land unit is an overlay of land cover maps, slope maps, and soil maps. Land units that produce erosion and exceed the tolerance limit are carried out with a land cover change scenario using the spatial multi-criteria analysis model. Scenario determination is also based on slope maps, land cover maps, ...
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One of the hazards of the erosion is soil infiltration capacity is decreased in the place of occurrence of erosion and increasing the volume of surface flow. It will also lead to the occurrence of the superficiality of the river due to... more
One of the hazards of the erosion is soil infiltration capacity is decreased in the place of occurrence of erosion and increasing the volume of surface flow. It will also lead to the occurrence of the superficiality of the river due to the deposition of materials of soil erosion. These hazards need alternative agrotechnology which could reduce the rate of soil erosion. This research is to know the hazard of soil erosion in the upper watershed of the Aie Limau Kambiang and find out the alternative agrotechnology for reducing the soil erosion. This research was conducted. Soil samples collected was taken in purposive random sampling based on a unit of land. The data were analyzed using the universal soil loss equation. The research results of the largest erosion threat come from the land use of traditional gardens and plant density is low. The highest erosion 151,012.00 ton/ha/year was founded on the plantation blended that have a steep slope over 35% LS value of 9.5. The better of ag...
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The development of Sianok Canyon area as a tourist destination in Bukittinggi - Indonesia also needs a disaster risk reduction to be included in. The city already has land user plan that restrics the develompment around the upper part od... more
The development of Sianok Canyon area as a tourist destination in Bukittinggi - Indonesia also needs a disaster risk reduction to be included in. The city already has land user plan that restrics the develompment around the upper part od the canyon. This restriction is nor equally effective because it has no consideration based on the actual thinking. the study that provide a scientific consideration is needed since the city has limited land. Then, the geological study and geotechnical invertigation was done to obtain required data. It is followed by the potential landslide analyses of the Canyon area. Furthermore, based on the result of the analysed the ssfety factor and safe distance criteria are proposed for consideration in the development plan of the city as well as to reduce the disaster risk
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Infiltration wells, biopore holes, retention ponds serve to collect surface water from rain and then seep into the ground to become ground water reserves. This study aims to look at the application of a distributed hydrological model for... more
Infiltration wells, biopore holes, retention ponds serve to collect surface water from rain and then seep into the ground to become ground water reserves. This study aims to look at the application of a distributed hydrological model for the analysis of absorbed discharges in infiltration wells, biopore holes and retention ponds in the Batang Kuranji watershed. Research methods the study was conducted using a survey method that is secondary data collection and primary data. In this study the techniques of rainfall data analysis, Batang Kuranji watershed land use, Runoff analysis using distributed hydrological models and absorbed discharges in infiltration wells, biopore holes, retention ponds in the Batang Kuranji watershed. By applying model 4 using 1 infiltration wells, 2 biopore holes and 4 retention ponds can reduce the runoff rate in the sub-watershed by 7.514% - 27.545%, for the watershed level can reduce the discharge of 15.297%, the more the number of absorption wells, biopo...
The construction of irrigation infrastructure in Indonesia continues to increase to fulfill the need for food. However natural disasters, limits to operating and maintenance funding and other factors often result in less than optimal... more
The construction of irrigation infrastructure in Indonesia continues to increase to fulfill the need for food. However natural disasters, limits to operating and maintenance funding and other factors often result in less than optimal operation of these systems. If one part of the system is lack operational then the whole system will be affected. Continuity of supply is very dependent on the reliability of water supply, the irrigation structures and farmers using the irrigation water in an optimal manner. An irrigation system must be reliable over the whole course of its service, not only in the planning stages but also in subsequent phases so it must be managed as efficiently as possible. This study identified the factors determining the reliability of the irrigation system in the 2,665 ha irrigation area of Koto Kandis in Pesisir Selatan district, West Sumatera province. The factors that play a major role in this system were discovered to efficiency of technical operation and maint...
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Research Interests: Geography and Flood Myth
The prediction of water requirement is important in planning and managing irrigation system. Based on this case, this study aims to evaluate water requirement of irrigation to obtain the prediction of maximum value of water requirement.... more
The prediction of water requirement is important in planning and managing irrigation system. Based on this case, this study aims to evaluate water requirement of irrigation to obtain the prediction of maximum value of water requirement. The research took place in Irrigation Area of Ampiang Parak at Pesisir Selatan Regency with the area was 2,363 hectares. The descriptive qualitative analysis approach was used to collect the data by using observation, interview and taking of primer and secondary data. The tabulation of data used Cropwat version 8.0 software to analyze water requirement values. The result of this research the calculation of water requirement values using Cropwat version 8.0 software are 4.772 m3/sec in MT 1, 4.770 m3/sec in MT 2, and 5.05 m3/sec in MT 3. The data shows that irrigation area may not have dryness. However, there is some area that is rainfed. Based on observation at Irrigation Area of Amping Parak there are leaking lines, and there are area irrigations th...
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Akibat bencana alam gempa bumi Sumatera Barat 30 September 2009 terjadi kemacetan di sepanjang jalan Alai-Bypass yang berdampingan dengan drainase Irigasi Gunung Nago di Kota Padang. Selanjutnya Pemerintah berkaitan dengan kegiatan... more
Akibat bencana alam gempa bumi Sumatera Barat 30 September 2009 terjadi kemacetan di sepanjang jalan Alai-Bypass yang berdampingan dengan drainase Irigasi Gunung Nago di Kota Padang. Selanjutnya Pemerintah berkaitan dengan kegiatan mitigasi bencana, membuat jalur evakuasi tsunami dengan melaksanakan pelebaran jalan Alai-Bypass yaitu memperbaiki sistem drainase Irigasi Gunung Nago sepanjang 2 km dengan penutup beton.Analisa Mengenai Dampak Lingkungan (Amdal) merupakan kajian mengenai dampak besar dan penting suatu kegiatan yang diperlukan sebagai proses pengambilan keputusan. Penerapan dilapangan kajian Amdal pada kegiatan ini belum sepenuhnya diterapkan.Penelitian dilakukan dengan menganalisa dokumen kontrak apakah didalamnya diatur mengenai Amdal, melakukan survai menggunakan pendekatan wawancara dan observasi lapangan untuk mengamati dampak yang terjadi serta mengklasifikasikan dampak yang terjadi. Hasil penelitian, selama pelaksanaan kegiatan terdapat dampak negatif dan positif. ...
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Sungai Batang Arau merupakan sungai yang memiliki nilai ekonomis, karena pada sungai Batang Arau khususnya pada daerah muara merupakan tempat pelabuhan kapal dimana pelabuhan ini berfungsi sebagai jalur penghubung antara laut dan daratan.... more
Sungai Batang Arau merupakan sungai yang memiliki nilai ekonomis, karena pada sungai Batang Arau khususnya pada daerah muara merupakan tempat pelabuhan kapal dimana pelabuhan ini berfungsi sebagai jalur penghubung antara laut dan daratan. Pada daerah Muara Sungai Batang Arau sering menimbulkan masalah salah satunya banyaknya sedimen yang mengendap pada Muara Sungai, yang menyebabkan naiknya muka air sehingga dapat menimbulkan banjir dan terhambatnya lalu lintas kapal nelayan saat air sungai surut dan saat air laut pasang. Adapun tujuan dari penelitian ini adalah untuk mendapatkan nilai volume sedimen yang mengendap pada muara sungai Batang Arau pertahunnya berdasarkan curah hujan dan peta tata guna lahan. Mengetahui banyaknya volume sedimen yang mengendap di Muara Sungai Batang Arau dengan menggunakan metode MUSLE. Hasil dari analisis perhitungan volume sedimen pada muara sungai Batang Arau dari Tahun 2005 sampai 2014 adalah Tahun 2005 sebanyak 28,368 m3, Tahun 2006 sebanyak 26,132 ...