FUZZY ANALYTIC HIERARCHY PROCESS BERBASIS MORFOMETRI UNTUK PRIORITAS PENANGANAN EROSI DI SUB DAERAH ALIRAN SUNGAI OYO (Fuzzy analytic hierarchy process based on watershed morphometry for erosion priority mapping in Oyo Sub Watershed)

Alfiatun Nur Khasanah, Arina Miardini

Abstract


Erosi merupakan salah satu indikasi kerusakan DAS. Dalam pengelolaan DAS perlu dilakukan urutan prioritas penanganan dengan memperhatikan karakteristik DAS, salah satunya yaitu karakter morfometri. Penelitian ini bertujuan untuk mengetahui lokasi prioritas penanganan erosi di Sub DAS Oyo berdasarkan data morfometri dengan menggunakan pemodelan Fuzzy AHP. Parameter morfometrik yang mempengaruhi erosi adalah Rbm (bifurcation ratio), Rc (circulatory ratio), Dd (drainage density), T (texture), Su (gradient), dan Rn (rugness number). Nilai tertinggi dari hasil analisis menunjukkan lokasi prioritas yang harus didahulukan penanganan erosinya. Tingkat prioritas tinggi terdapat pada 21 sub-sub DAS dengan luas 3.82 ha, tingkat sedang pada 35 sub-sub DAS dengan luas 17.780,21 ha, tingkat rendah pada 106 sub-sub DAS dengan luas 48.974,46 ha. Urutan prioritas penanganan erosi pada tingkat sub DAS sangat penting untuk menyusun rencana pengelolaan DAS dalam rangka pengendalian erosi tanah yang sesuai sebagai upaya perlindungan tanah dari erosi lebih lanjut.


Keywords


fuzzy-AHP; morfometri; prioritas; erosi; Sub DAS Oyo

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DOI: https://doi.org/10.20886/jppdas.2020.4.1.63-78

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