Roby Hambali

• Universitas Gadjah Mada

Timbunan sampah yang berada pada Tempat Pemrosesan Akhir (TPA) seharusnya dilakukan layering (penutupan) dengan tanah secara rutin sesuai dengan ketentuan pengelolaan TPA. Penyedian material (tanah) sebagai material penutup timbunan sampah memerlukan biaya yang tidak sedikit, sehingga kegiatan penutupan timbunan sampah di TPA sering mengalami kenda...

Berok River is one of the small scales of fishing activities in Central Bangka Regency for mooring boats and loading-unloading activities. The flow of entry and exit for fishing boats at the mouth of the Berok River often experience problems, where the channel becomes shallow due to sedimentation. The behaviour of sediment transport in river mouths...

Soil shear strength is one of the parameters for assessing the bearing capacity of the soil. Clay soil is a type of soil with poor bearing capacity. To improve the bearing capacity of clay, a mixture of materials can be used as a stabilizing agent. In this study, the mixed material used as a stabilizing agent was bagasse ash plus cement with a perc...

This research aims to determine the use of flue gas desulfurization gypsum waste as a partial substitution of cement for the manufacture of concrete bricks. Flue gas desulfurization gypsum is waste from the tin processing that takes place. This research uses flue gas desulfurization gypsum waste compositions of 5%, 15%, 25%, and 35% by weight of ce...

TPA Parit 6 is the final waste processing site in Pangkalpinang. Solid waste in this site is only piled up; so that it forms an embankment of garbage that is up to 9 m high, part of the embankment has a landslide and causes a bad smell that is very disturbing to the surrounding environment, so good waste management is needed at this site.The aim of...

Arung Dalam Beach underwent significant process of coastal erosion. This study aimed to determine the Hydro-Oceanographic conditions in Arung Dalam Beach using MIKE 21 FM and planning of coastal protection structures. The currents pattern during high tide was dominant from the northwest to the east with a rate of 0.042-0.09 m/second. The current pa...

DAS Baturusa merupakan DAS terbesar urutan keempat di Provinsi Kepulauan Bangka Belitung setelah DAS Mancung, DAS Linggang, dan DAS Kurau. Maraknya aktivitas tambang ilegal disinyalir menjadi penyebab kerusakan DAS di Kepuluan Bangka Belitung, salah satunya DAS Baturusa. Kerusakan yang umum terjadi pada DAS yaitu erosi lahan. Tujuan dari penelitian...

In the context of primary tin mining by PT. Timah on the Bangka Island, an analysis of environmental impacts is needed concerning various related aspects. One of the potential impacts that need to be considered is erosion due to open land for mining activities. Rain and mining water triggers the process of erosion on open land with particular soil...

Floods in Pangkalpinang City are caused by high rainfall. In addition, the decline in the performance of the existing drainage system also causes flooding. The reduction in channel capacity is due to sedimentation, resulting it unable to accommodate the design discharge. This condition has an impact on overflow in the surrounding area. Partial iden...

Pembangunan perumahan secara intensif yang dilakukan di Kota Pangkalpinang dengan kondisi yang minim ruang terbuka hijau menyebabkan tingginya limpasan permukaan pada musim hujan, dan berkurangnya pengisian cadangan air tanah. Hal tersebut menyebabkan terjadinya bencana banjir. Selain itu, rendahnya pengisian cadangan air tanah juga dapat menyebabk...

A large part of post-tin mining land covered by sand tailing which has low water storage capacity, making it vulnerable to drought stress. The innovation of irrigation technology has been developed to overcome this problem such as capillary irrigation system combined with groasis system using a large reservoir with hydroponic wick system called the...

Data curah hujan merupakan komponen penting dalam analisis debit banjir pada daerah yang tidak terdapat debit terukur (ungauged catchment). Namun, karena keterbatasan ketersediaan stasiun pengukur hujan permukaan dan rendahnya aksesibilitas untuk memperoleh data curah hujan, maka diperlukan alternatif lain untuk memperoleh data curah hujan tersebut...

Intisari Pasar Induk Kota Pangkalpinang merupakan suatu Kawasan kompleks yang terdiri dari pemukiman dan perniagaan yang paling berpengaruh dalam kegiatan ekonomi di Provinsi Kepulauan Bangka Belitung. Sebagai pusat perdagangan yang cukup padat, terdapat banyak limbah yang dihasilkan dari aktivitas masyarakat dan pedagang setempat setiap harinya, b...

Short-duration rainfall characteristics in the form of certain intensity, time, and spatial distribution become valuable contribution for lahar flow disaster mitigation in a mountainous region. Due to mitigation purpose, such information can be provided through the rainfall nowcasting process. One of the promising rainfall nowcasting applications i...

Providing reliable rainfall information through the integration of all possible data sources such as rain gauge and radar can make a valuable contribution to the development of the lahar flow warning system. However, the reliability of radar rainfall ( R ) data still needs to be evaluated based on ground rainfall ( G ) given the estimated value of...

Pengujian keandalan (reliability) data penakar hujan otomatis (ARR) di wilayah Gunung Merapi sangat diperlukan, mengingat data tersebut digunakan sebagai acuan untuk mengoreksi kesalahan perkiraan hujan radar X-band MP. Stasiun-stasiun ARR yang mengandung data tidak andal perlu dieliminasi agar perkiraan hujan radar dapat dikoreksi berdasarkan data...

The utilization of the side channel spillway as the primary component of dam is generally due to the limitation of the available space to construct conventional spillway with design discharge capacity. Some impacts may only be identified through the hydraulic physical model study; these include the presence of the chaotic jumps at the downstream of...

X-band radar gives several advantages for quantitative rainfall estimation, involving higher spatial and temporal resolution, also the ability to reduce attenuation effects and hardware calibration errors. However, the estimates error due to attenuation in heavy rainfall condition cannot be avoided. In the mountainous region, the impact of topograp...

Rainfall monitoring is important for providing early warning of lahar flow around Mt. Merapi. The X-band multi-parameter radar developed to support these warning systems provides rainfall information with high spatial and temporal resolution. However, this method underestimates the rainfall compared with rain gauge measurements. Herein, we performe...

Flood warning systems have become increasingly necessary to reduce hazard risk, especially lahar flow disaster. An effective lahar flow early warning system should provide information timely, thus allowing sufficient waiting time to respond. As an input to the lahar flow early warning systems, short-term rainfall information derived from a rainfall...

Pelaksanaan KKN tematik ini didasarkan pada tujuan objektif revitalisasi fungsi sistem drainase Kota Pangkalpinang untuk mengurangi resiko banjir yang selama ini sering terjadi. Untuk dapat melakukan revitalisasi fungsi tersebut, sistem drainase harus dipandang sebagai satu kesatuan sistem tata air, dan penyelesaiannya memerlukan multidisiplin ilmu...

Paradigma baru dalam sistem pendidikan nasional yang diamanatkan dalam Undang undang Nomor 23 tahun 2003 adalah satuan pendidikan berbasis kearifan lokal yang mendorong percepatan pembangunan di daerah berdasarkan potensi yang dimiliki oleh masyarakat lokal. Jurusan Teknik Sipil Fakultas Teknik Universitas Bangka Belitung sebagai bagian dari satuan...

Short duration rainfall information has now become one of many important aspects to support the development of warning criteria for disaster mitigation. Similar importance is also found in the development of warning criteria against the lahar flow disaster at Mt. Merapi area. The rainfall information obtained from the radar observation has also bec...

Pengamatan dan perkiraan hujan menggunakan radar berkembang cukup pesat, mengingat metode ini mampu menghasilkan data hujan dengan resolusi spasial dan temporal yang lebih baik dibanding dengan penakar hujan. Namun demikian, tingkat kebenaran informasinya, yaitu korelasi data hujan radar terhadap pengukuran hujan di permukaan lahan perlu dilakukan...