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OPSI REVITALISASI FUNGSI PRASARANA HIDRAULIK PERSAWAHAN RAWA PASANG SURUT L. Budi Triadi
JURNAL TEKNIK HIDRAULIK Vol 5, No 1 (2014): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Impact Of Water Dynamics Land On Rate And Time Of Peat Swamp Land Subsidence Tropika L. Budi Triadi; Hengky F. Adji; Arif Dhiaksa
JURNAL TEKNIK HIDRAULIK Vol 7, No 2 (2016): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Changes in land use of tropical peat will lead to the release of carbon (C) on the condition that initially stabilized, and resulting in land subsidence. Peatland clearance which is preceded by the construction of the canals will cause the ground water table in peatlands fell. Along with that, the subsidence occurs, which at the beginning of peatland reclamation rate of decline very fast and gradually slow down over time with reduction of organic materials that decompose or burn. Therefore, knowledge of the rate of subsidence is very important to plan drainage and optimal use of peat land in order to preserve the peat. The method or scientific approach used is the assessment directly, include: measurement of the location of groundwater levels, land subsidence at various existing condition of land in different locations, peat soil sampling and calculation with the empirical formula. The calculation of land subsidence using average data groundwater levels during the dry season, in addition to the types of land cover took into account as well. This paper presented the results of the analysis of land subsidence and the projected decline in the next 50 years peatlands in Sei Ahaz, Kapuas, Central Kalimantan and Sungai Buluh, Tanjung Jabung, Jambi and comparative results between the two locations. The implications of this study indicate that the regulation of groundwater levels will control land subsidence.

Potensi Pasang Surut Lahan Rawa untuk Pengembangan Irigasi di Kabupaten Merauke Menggunakan Pemodelan Hidrodinamika 1D2D Yudi Lasmana; Parlinggoman Simanungkalit; Muhammad Gifariyono; Ganggaya Sotyadarpita; L. Budi Triadi
JURNAL TEKNIK HIDRAULIK Vol 9, No 1 (2018): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Development of agriculture in lowland areas in Merauke Regency of Papua Province has been undertaken by both the Government and the community. However, the existing condition shows during the dry season the rice fields are drought so that it can only be one time a year. This is because the water needed to irrigate the land relies on water from the tides while the highest water when the tide has not been able to enter the land. Merauke District has three major rivers, namely Bian River, Kumbe River and Maro River, the three rivers are the source of water that can be the potential to overcome this problem. Therefore, a study was conducted to determine the potential of ups and downs of the River BIKUMA as input in the development of lowland irrigation in Merauke Regency. This study is supported by hydrometry and hydraulic surveys conducted during the dry season during spring tide and neap tide simultaneously for all three rivers. The survey included measuring river geometry activities with a range of 5 Km, river hydrometry measurements (observation of water fluctuations with proportional distances for model calibration and upstream river velocity for discharge). Limitations of river upstream measurements are limited by the distance of the Bian River 125 Km, the River Kumbe along the 171 km, and the Maro River along 66 km. Then performed a 1D2D hydrodynamic mathematical modeling that describes the movement of water from upstream to downstream. From the results of modeling is known that the water entering from the sea to the Bikuma River is greater than the water out to sea. The potential for tides is 1.7 M m3. Furthermore, the simulation of Sobek 1D2D obtained the extent of natural condition, the area that can be inundated is 123.609 ha. Utilization of tidal potential can be channeled to the development of lowland irrigation in Merauke. Upper tidal energy in the upstream can be directed to the development zone location through an integrated lowland irrigation water management system so that water utilization can be optimal.

DAMPAK KENAIKAN MUKA AIR LAUT TERHADAP KESESUAIAN LAHAN RAWA PASANG SURUT TABUNGANEN KALIMANTAN SELATAN L. Budi Triadi
JURNAL SUMBER DAYA AIR Vol 10, No 2 (2014)
Publisher : Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Kesesuaian lahan daerah rawa sangat dipengaruhi oleh kondisi fluktuasi muka air laut, curah hujan, potensial drainase dan intrusi air laut. Dengan adanya pengaruh perubahan iklim global yang menyebabkan naiknya muka air laut, akan merubah hidrotopografi lahan rawa, yang mengakibatkan perubahan jenis tanaman yang sesuai pada lahan tersebut.. Perubahan kesesuaian lahan tersebut dialami oleh daerah rawa yang dekat dengan muara sungai seperti daerah rawa Tabunganen. Daerah rawa Tabunganen yang berada di sekitar muara sungai Barito akan menerima dampak perubahan kenaikan muka air laut secara langsung. Penelitian ini menggunakan GIS untuk mendapatkan peta keseuaian lahan eksisting dan dampak kenaikan muka air laut melalui cara tumpang susun peta-peta tematik, antara lain peta irigasi dan drainase, peta kedalaman gambut dan pirit, serta peta salinitas. Dengan diketahuinya dampak kenaikan muka air laut tersebut terhadap deliniasi kesesuaian lahannya, maka dapat dilakukan antisipasi dengan melakukan adaptasi jenis tanaman terhadap tren perubahan kesesuaian lahan yang terjadi.

Dampak Kenaikan Muka Air Laut Terhadap Kesesuaian Lahan Rawa Pasang Surut Tabunganen Kalimantan Selatan L. Budi Triadi
JURNAL SUMBER DAYA AIR Vol 10, No 2 (2014)
Publisher : Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jsda.v10i2.115

Kesesuaian lahan daerah rawa sangat dipengaruhi oleh kondisi fluktuasi muka air laut, curah hujan, potensial drainase dan intrusi air laut. Dengan adanya pengaruh perubahan iklim global yang menyebabkan naiknya muka air laut, akan merubah hidrotopografi lahan rawa, yang mengakibatkan perubahan jenis tanaman yang sesuai pada lahan tersebut.. Perubahan kesesuaian lahan tersebut dialami oleh daerah rawa yang dekat dengan muara sungai seperti daerah rawa Tabunganen. Daerah rawa Tabunganen yang berada di sekitar muara sungai Barito akan menerima dampak perubahan kenaikan muka air laut secara langsung. Penelitian ini menggunakan GIS untuk mendapatkan peta keseuaian lahan eksisting dan dampak kenaikan muka air laut melalui cara tumpang susun peta-peta tematik, antara lain peta irigasi dan drainase, peta kedalaman gambut dan pirit, serta peta salinitas. Dengan diketahuinya dampak kenaikan muka air laut tersebut terhadap deliniasi kesesuaian lahannya, maka dapat dilakukan antisipasi dengan melakukan adaptasi jenis tanaman terhadap tren perubahan kesesuaian lahan yang terjadi.

Dampak Dinamika Muka Air Tanah pada Besaran Dan Laju Emisi Carbon Di Lahan Rawa Gambut Tropika L. Budi Triadi; Fengky F. Adji; Yudi Lasmana
JURNAL SUMBER DAYA AIR Vol 14, No 1 (2018)
Publisher : Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Drainage of peatlands will lower the water table, decompose the organics matter and increases the fire risk. Therefore knowledge of C emission rate is very important for drainage system planning, in order to preservepeat. Scientific methods that used in this study: calculation of thickness/ depth of the peat, peat volume, oxidized peat volume, C dry peat weight and CO2 equivalent. The rate of emission C is calculated on the basisof emission C and subsidence time. Furthermore, the emission rate C (Mton CO2/ yr) is calculated based on 4 (four) model/ scenario concepts, i.e: actual/ existing condition, plantation, canal blocking and canal blocking with reforestation. This activity was conducted in Sei Ahas, Kapuas, Central Kalimantan and Sungai Buluh, Tanjung Jabung Timur, Jambi. Based on research, it was found that land use change will greatly affect the change of ground water level of peat that contributes to increases the emission of C to the atmosphere.

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