Pemodelan Pola Sedimentasi di Muara Cisadane untuk Mendukung Pengembangan Terpadu Pesisir Ibukota Negara

Mardi Wibowo, Hanah Khoirunnisa, Khusnul Setia Wardhani, R. Wijayanti
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引用次数: 1

Abstract

NCICD is one of the national strategic programs to deal with coastal problems in Jakarta. One alternative structure to be built is WLP or known as coastal resort. As an initial step to make it happen, BAPPENAS plans to build a WLP pilot plan around the S. Cisadane estuary. One of the main considerations for designing the WLP layout is the process and pattern of sedimentation around the Cisadane estuary. Therefore, computational modeling of sediment transport around the Cisadane estuary was carried out for a period of 1 year (August 2020-July 2021). This modeling uses MIKE-21 module MIKE21/3 Integrated Models software which combines hydrodynamics and cohesive sediment transport models. Based on the results of this modeling, it is known that there are differences in sediment transport patterns in the west and east monsoons. During 1 year, changes in the thickness of the bottom sediment around the estuary of S. Cisadane ranged from -0.4 to 0.7 m with a mean of 0.086 m. Coastal reservoir design must take into the very dynamic sedimentation process around the Cisadane estuary.   Pengembangan Terpadu Pesisir Ibukota Negara (PTPIN) merupakan salah satu program strategis nasional untuk menangani permasalahan pesisir di Jakarta. Salah satu alternatif struktur yang akan dibangun adalah WLP atau dikenal sebagai coastal reservoir. Sebagai langkah awal mewujudkannya BAPPENAS merencanakan membangun pilot plan WLP di sekitar muara S. Cisadane. Salah satu pertimbangan utama untuk mendesain layout WLP adalah proses dan pola sedimentasi di sekitar muara Cisadane. Oleh karena itu dilakukan pemodelan komputasi transpor sedimen di sekitar muara Cisadane selama kurun waktu 1 tahun (Agustus 2020-Juli 2021). Pemodelan ini menggunakan software MIKE-21 module MIKE21/3 Integrated Models yang menggabungkan model hidrodinamika dan transpor sedimen kohesif. Berdasarkan hasil pemodelan ini diketahui bahwa terdapat perbedaan pola transpor sedimen di musim barat dan musim timur. Selama 1 tahun, perubahan ketebalan sedimen dasar di sekitar muara S. Cisadane berkisar -0,4-0,7 m dengan rerata 0,086 m. Pola sedimentasi yang sangat dinamis harus mendapatkan perhatian khusus dalam merancang waduk lepas pantai. 
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模拟Cisadane海滩的沉积极点以支持国家首都海的综合开发
NCICD是处理雅加达沿海问题的国家战略项目之一。将要建造的一个替代结构是WLP或被称为海岸度假区。作为实现这一目标的第一步,BAPPENAS计划在S.Cisadane河口周围建立一个WLP试点计划。设计WLP布局的主要考虑因素之一是Cisadane河口周围的沉积过程和模式。因此,对Cisadane河口周围的泥沙输移进行了为期1年的计算建模(2020年8月至2021年7月)。该建模使用MIKE-21模块MIKE21/3综合模型软件,该软件结合了流体动力学和粘性泥沙输移模型。根据该模型的结果,我们知道东西季风的泥沙输送模式存在差异。在一年内,S.Cisadane河口周围底部沉积物厚度的变化范围为-0.4至0.7 m,平均值为0.086 m。海岸水库设计必须考虑Cisadanne河口周围非常动态的沉积过程。国家首都沿海机场开发是解决雅加达沿海问题的国家战略方案之一。将要建造的结构替代方案之一是WLP或被称为海岸水库。作为创建的第一步,BAPPENAS计划在S.Cisadane的沼泽地周围建立一个WLP试点计划。设计WLP布局的主要考虑因素之一是顺沙丹虫周围的过程和沉积模式。因此,在一年的时间里(2020年8月至2021年7月),对顺沙丹虫周围的泥沙输移计算进行了模拟。该模型使用MIKE-21软件模块MIKE21/3综合模型,该模型结合了流体动力学模型和相干输沙器。基于该模型的结果,可以看出东西季节泥沙输移模式存在差异。一年来,Cisadane蠕虫周围的基本沉积阻力变化范围为-0.4-0.7m,直径为0.086m。在设计海上船只时,应特别注意高度动态的沉积模式。
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