Assessing the Heat Vulnerability Index (HVI) in Klang Valley Using Principal Component Analysis (PCA) and an Equal-Weighted Approach
DOI:
https://doi.org/10.23917/forgeo.v39i2.8633Keywords:
Heat Vulnerability Index (HVI), Principal Component Analysis (PCA), Equal Weighted Index (EWI)Abstract
Urbanisasi telah menyebabkan lebih dari 50% populasi global tinggal di daerah perkotaan, berkontribusi pada modifikasi signifikan dalam iklim perkotaan yang memperburuk efek buruk perubahan iklim, khususnya pada kesehatan manusia. Studi ini bertujuan untuk menilai Indeks Kerentanan Panas (HVI) di Lembah Klang, Malaysia, menggunakan Analisis Komponen Utama (PCA) dan Indeks Tertimbang Setara (EWI). Selanjutnya membandingkan kedua metode untuk menentukan mana yang lebih efektif mencerminkan konteks lingkungan dan sosial-ekonomi wilayah tersebut. Berfokus pada suhu permukaan tanah sebagai paparan, variabel sensitivitas dan adaptif lainnya ditriangulasi di mana indeks kerentanan panas dikembangkan. Temuan menunjukkan wilayah lembah Klang memiliki tingkat kerentanan yang bervariasi terhadap tekanan panas, dengan kota yang paling terdampak adalah Kuala Lumpur dan Petaling karena faktor sensitivitas paparan dan kapasitas adaptif. Seperti yang dapat dilihat, HVI-PCA mencakup 7,06% untuk Sangat Rendah, 12,87% untuk Rendah, 54,82% untuk Sedang, 14,99% untuk Tinggi, dan 10,26% untuk kerentanan Sangat Tinggi, sementara HVI-EWI mewakili Sangat Rendah pada 6,62%, Rendah pada 51,29%, Sedang pada 26,86%, Tinggi pada 15,22% dan Sangat Tinggi pada 0,02%. Perbedaan-perbedaan ini menggarisbawahi pentingnya pilihan metodologis, di mana PCA mendukung ketahanan empiris berdasarkan metode berbasis data. Pada saat yang sama, EWI cocok ketika konsensus ahli kurang atau ketika kesederhanaan dan dukungan pemangku kepentingan yang luas diperlukan. Rekomendasi termasuk memaksimalkan representasi indikator untuk penilaian yang akurat dan perencanaan perkotaan yang tangguh terhadap stresor terkait panas. Studi ini dapat berfungsi sebagai HVI dasar dari area studi, yang memungkinkan pengembangan teknik pencegahan untuk mengurangi kondisi panas ekstrem.
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Copyright (c) 2025 Normaisurah Samsuddin, Siti Aekbal Salleh, Nafisah Khalid, Noraain Mohamed Saraf, Rostam Yaman, Lynlei Pintor, Girlie Rueda, Normalyana Samsuddin
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