Judul: Evaluation of The Thermal Comfort in Green Open Space in Pekalongan City Using Physiological Equivalent Temperature (PET)
Abstrak: Keberadaan ruang terbuka hijau di wilayah perkotaan sangat penting untuk menurunkan suhu lingkungan dan memengaruhi tingkat kenyamanan termal di suatu kota. Penelitian ini bertujuan untuk mengetahui tingkat kenyamanan termal ruang terbuka hijau Lapangan Mataram Kota Pekalongan. Metode yang digunakan adalah pendekatan Physiological Equivalent Temperature (PET). Perhitungan nilai kenyamanan dibagi menjadi dua yaitu pengukuran observasi dan wawancara responden dengan aktivitas berlari, berjalan dan duduk. Pengamatan pengukuran dilakukan pada 18 titik Lapangan Mataram yang dibedakan berdasarkan kerapatan tutupan tajuknya. Kerapatan tutupan tajuk diurutkan berdasarkan sky view factor dan dibagi menjadi tiga yaitu naungan tajuk rapat, naungan tajuk sedang, dan naungan tajuk jarang. Hasil pengukuran menyatakan bahwa waktu terbaik untuk mengunjungi Lapangan Mataram berdasarkan nilai PET adalah pada sore hari dengan PET 27 ⁰C-28 ⁰C. Kenyamanan termal di tutupan tajuk rapat lebih baik nilainya dibandingkan di tajuk sedang dan jarang. Berdasarkan kuisioner responden dengan aktivitas berlari, berjalan dan duduk, lebih dari 75% responden merasa ‘nyaman’ pada PET berturut-turut 29.9 ⁰C; 27.8 ⁰C; 32.7 ⁰C, lebih dari 75% responden merasa ‘hangat’ pada PET berturut-turut 30.5 ⁰C; 31.7 ⁰C; 33.4 ⁰C serta lebih dari 75% responden merasa ‘panas’ pada PET berturut-turut 31.2 ⁰C; 34.2 ⁰C; 36.1 ⁰C. Tidak semua nilai rataan PET responden masuk ke dalam rentang PET Taiwan., The existence of green open spaces in urban areas is very important to reduce enviromental temperature and effect the level of thermal comfort in a city. This study aims to determine the level of thermal comfort in the green open space of Mataram Field, Pekalongan City. The method used is the Physiological Equivalent Temperature (PET) approach. The calculation of the comfort value is divided into two, namely observation measurements and interviews with respondents with running, walking and sitting activities. Measurement observations were made at 18 points in the Mataram Field which were differentiated based on their crown cover density. Canopy cover density is sorted based on the sky view factor and is divided into three, namely dense canopy shade, moderate canopy shade, and sparse canopy shade. The measurement results state that the best time to visit the Mataram Field based on the PET value is in the afternoon with a PET of 27 ⁰C-28 ⁰C. Thermal comfort in dense canopy cover is better than in moderate and sparse canopy. Based on the respondent's questionnaire, not all of the respondents' PET values fall into the Taiwan PET range. Based on respondent’s quistionnaire with running, sitting and walking activities, more than 75% of respondents felt ‘comfortable’ on PET in a row 29.9 ⁰C; 27.8 ⁰C; 32.7 ⁰C, more than 75% of respondents felt ‘warm’ on PET in a row 30.5 ⁰C; 31.7 ⁰C; 33.4 ⁰C and more than 75% of respondents felt ‘heat’ on PET successively 31.2 ⁰C; 34.2 ⁰C; 36.1 ⁰C. Not all of the PET respondent’s mean values fall into the range of Taiwanese PET.
Keyword: Mataram Field, Pekalongan City, physiological equivalent temperature (PET), thermal comfort