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      Simulasi Dampak Perubahan Tutupan Lahan terhadap Respons Hidrologi DAS Ciliwung Hulu

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      Date
      2025
      Author
      Aiman, Muhammad Faris
      Taufik, Muh.
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      Abstract
      Tutupan lahan sangat memengaruhi respons hidrologi suatu DAS sehingga perubahannya dapat mengganggu siklus hidrologi. Respons hidrologi terhadap perubahan tutupan lahan di masa depan perlu dimodelkan untuk memahami perubahan siklus hidrologi yang mungkin terjadi. Penelitian ini bertujuan mengestimasi respons hidrologi DAS Ciliwung Hulu terhadap perubahan tutupan lahan pada tahun 2024, 2029, dan 2034. Prediksi perubahan tutupan lahan pada DAS Ciliwung Hulu tahun 2029 dan 2034 dilakukan menggunakan metode CA-Markov. Sementara itu simulasi respons hidrologi dilakukan menggunakan model SWAT. Penelitian ini menganalisis perubahan tutupan lahan yang terjadi pada periode 2014-2034 serta debit air berdasarkan respons hidrologinya. Hasil menunjukkan adanya tren perubahan tutupan lahan selama periode penelitian berupa peningkatan lahan terbangun hingga 85% dan penurunan vegetasi rapat hingga 19%. Debit air rata-rata bulanan mengalami tren peningkatan selama periode penelitian, meskipun dengan nilai yang tidak signifikan. Debit bulan basah dan debit bulan kering juga mengalami peningkatan sebesar 1%. Selain debit, komponen hidrologi aliran permukaan mengalami peningkatan tetapi aliran air tanah mengalami penurunan. Studi ini memberikan pemahaman tentang respons hidrologi terhadap tutupan lahan yang berbeda dan menyediakan informasi penting bagi para pihak terkait dalam perencanaan DAS Ciliwung Hulu.
       
      Land cover strongly influences the hydrological response of a watershed, so that its alteration can significantly impact the hydrological cycle. The hydrological response to future land cover changes needs to be modeled to understand the changes in hydrological cycles that may occur in the future. This study aims to estimate the hydrological response of the Upper Ciliwung Watershed to land cover change in 2024, 2029, and 2034. We predicted land cover change in 2029 and 2034 using CA-Markov. The hydrological response of the Upper Ciliwung watershed was simulated using SWAT. We analyzed the land cover change that occurred from 2014 to 2034 and the water discharge based on its hydrological response. The results showed a trend of land cover change in the study period in the form of an increase in built-up land up to 85% and a decrease in dense vegetation up to 19%. Monthly average water discharge experienced an increasing trend in the study period with insignificant values. Wet month discharge and dry month discharge also increased by 1%. In addition to streamflow, the hydrological component of surface runoff shows an increasing trend, while groundwater flow exhibits a decline This study provides an understanding of the hydrological response to different land cover and provides information for watershed planning for stakeholders.
       
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      http://repository.ipb.ac.id/handle/123456789/168447
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      • UT - Geophysics and Meteorology [1718]

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      Indonesia DSpace Group 
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