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Journal : JURNAL SUMBER DAYA AIR

Pemodelan Daerah Genangan Banjir Ekstrem Bendung Sungai Piam Kabupaten Langkat Provinsi Sumatera Utara Zevri, Asril
JURNAL SUMBER DAYA AIR Vol 21, No 1 (2025)
Publisher : Direktorat 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.v21i1.915

Abstract

The construction of the Piam River weir is one of the efforts to support food security for the community, especially in Langkat Regency. Increased water levels in the rainy season with high intensity and long duration can cause rapid changes in the return flow with large volumes in the upper reaches of the river. Changes in the return flow can cause flooding in the river plain, resulting in a risk of loss to the community. One of the initial nonstructural efforts in flood mitigation is to delineate flood inundation areas through hydraulic simulation modelling based on the 100-year return period maximum flood discharge, longitudinal and transverse river profiles, and weir profiles. Modelling simulations were carried out using HEC RAS Software in a 2-dimensional manner based on 100-year return period flood discharge data as boundary conditions upstream, DEMNAS as a base map of the river geometry profile, and weir dimensions as boundary conditions downstream. The results of modeling the flood inundation area with a 100-year return period flood discharge of 239.66 m3/det show that the maximum potential flood water level reaches 3 m inundating the plain area up to 500 m from the river bank. The flood inundation area that occurs reaches 390.21 ha so that flood control efforts are needed by building embankments and normalizing the river upstream of the weir.
ANALISIS KEBUTUHAN KAPASITAS TAMPUNGAN EMBUNG DANAU ASAM KABUPATEN DI KOTAWARINGIN BARAT Zevri, Asril
JURNAL SUMBER DAYA AIR Vol 17, No 2 (2021)
Publisher : Direktorat 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.v17i2.719

Abstract

This study aims to analyze the requirement for the storage capacity of Danau Asam Reservoir as one of the solutions in increasing the availability of water to meet the needs of raw water due to population growth and climate change which is quite extreme. The study was conducted in the Danau Asam Reservoir with source of water from two watersheds that flow into the reservoir, namely the Lopo River Basin with a catchment area of 11.81 Km2 and Kamat Bay with a catchment area of 12.42 Km2 in Kotawaringin Lama District in the West Kotawaringin Regency. The method used is a quantitative approach based on a simulation of the water balance between the inflow and outflow. The inflow parameter is calculated based on 90% probability reliable discharge using the FJ Mock method in two watersheds and the outflow parameter is based on the raw water demand discharge which is calculated based on the population growth rate. The result of the research indicate that the capacity of the Danau Asam Reservoir is 391,842.72 m3 to meet the raw water needs in Kotawaringin Lama District with a population of 35397 people.Keywords: Drought, Raw Water, Storage, Kotawaringin Barat
PENGARUH DINAMIKA PASANG SURUT TERHADAP DAERAH IRIGASI RAWA PANTAI KABUPATEN KAPUAS PROVINSI KALIMANTAN TENGAH Zevri, Asril
JURNAL SUMBER DAYA AIR Vol 19, No 1 (2023)
Publisher : Direktorat 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.v19i1.803

Abstract

 The food crisis caused by the Covid-19 pandemic has caused the level of hunger to increase to a chronic level that is almost experienced by the whole world, including Indonesia. The increase in population with extreme climate change is a serious problem to overcome the food crisis in the next few years. The impact of climate change with changes in land use results in limited water availability in the development of irrigated land. One solution to overcome the availability of water for the development of irrigated land is to rehabilitate and improve the network of swamp irrigation areas that utilize the dynamics of tidal water levels. Pantai Swamp Irrigation Area is one of the potential lands to be developed into agricultural cultivation land. The study aims to determine the effect of tidal water level elevation on irrigated land based on hydro-topography. The study was conducted in the Pantai Swamp Irrigation Area with the water source coming from the tidal Kapuas Murung River. The method was conducted quantitatively using HEC-RAS software based on tidal data, cross-section and length of the channel, and surface elevation of irrigated land. The results showed that the influence of the tidal dynamics of the Kapuas Murung River is very dominant in irrigating the land with an average tidal water level elevation of + 1.57 m with hydro-topographic dominance included in categories B and C with an area of B 604.5 Ha and C 1201. 5 Ha.Keywords: Tides, Swamps, Hydro-topography, Sungai, Kapuas