scholarly journals Analisis Tingkat Kenyamanan Di DKI Jakarta Berdasarkan Indeks THI (Temperature Humidity Index)

2017 ◽  
Vol 15 (1) ◽  
pp. 57 ◽  
Author(s):  
Trinah Wati ◽  
Fatkhuroyan Fatkhuroyan
Keyword(s):  
Thermal Comfort ◽  
Residential Area ◽  
Comfort Level ◽  
Climate Data ◽  
Average Percentage ◽  
Temperature Humidity Index ◽  
Humidity Index ◽  
Urban Heat ◽  
The City

ABSTRAKFenomena iklim mempengaruhi kenyamanan fisiologis di daerah pemukiman. Analisa tingkat kenyamanan di DKI Jakarta dilakukan menggunakan THI (Temperature Humidity Index). Berdasarkan data iklim periode 1985 – 2012 stasiun Kemayoran, Tanjung Priok, Halim, Cengkareng dan Pondok Betung, hasil penelitian menunjukkan rata-rata prosentase tingkat kenyamanan harian dengan kategori tidak nyaman sebesar 22,1 % (81 hari per tahun), sebagian nyaman 71 % (259 hari per tahun) dan nyaman 7,1% (26 hari per tahun). Tingkat kenyamanan menunjukkan semakin ke tengah kota semakin besar prosentase tidak nyaman. Selama periode tersebut terjadi kecenderungan peningkatan indeks THI dengan signifikansi > 50% menunjukkan tingkat kenyamanan di DKI Jakarta cenderung semakin tidak nyaman.Kata kunci: tingkat kenyamanan, temperature humidity index, urban heat islandABSTRACTClimate phenomenon affects physiological comfortableness in residential area. Analysis of thermal comfort level in DKI Jakarta were conducted using THI (Temperature Humidity Index).  Based on climate data stations in Kemayoran, Tanjung Priok, Halim, Cengkareng dan Pondok Betung during 1985-2012 showed that the average percentage of daily thermal comfort level with categories uncomfortable were 22,1% (81 days per year), half comfortable 71 % (259 days per year) and comfortable 7,1% (26 days per year). The study showed that the greater percentage uncomfortable level, the closer into the center of the city and during 1985 to 2012 the THI index tend to increasing with significant level more than 50% meant that the thermal comfort level tend to more uncomfortable.Keywords: thermal comfort level, temperature humidity index, urban heat islandCitation: Wati, T dan Fatkhuroyan. (2017). Analisis Tingkat Kenyamanan Di DKI Jakarta Berdasarkan Indeks THI (Temperature Humidity Index). Jurnal Ilmu Lingkungan, 15(1), 57-63, doi:10.14710/jil.15.1.57-63

scholarly journals Kajian Tingkat Kenyamanan Berdasarkan Termal Humidity Index (THI) Lanskap Jalan Soekarno Hatta Kota Malang

BUANA SAINS ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 47
Author(s):  
Rizki Alfian ◽  
Nuraini Nuraini
Keyword(s):  
Thermal Comfort ◽  
Physical Condition ◽  
Maximum Size ◽  
Comfort Level ◽  
City Area ◽  
Average Temperature ◽  
Humidity Index ◽  
Track Area ◽  
The City ◽  
Selection Of

Streets as part of the city's landscape that support  the function and activities of the city. Each street in the city area has a streetscape which aims to support the users activities. Soekarno Hatta street is one of the protocol street in Malang city with the track area which is quite famous and one of the loud route in Malang City. This research aims to: 1) identify vegetation on the streetscape on Soekarno Hatta street; 2) analyze thermal comfort on the Soekarno-Hatta streetscape. Based on the observation, it is known that the trembesi population dominates at the Soekarno Hatta streetscape. Soekarno Hatta street has an average temperature of 31.1 ° C and an average humidity of 57%. Soekarno Hatta street has THI value of 28.43 whereas THI value which is categorized as comfortable is between 21 - 27. Based on the physical observation on Soekarno Hatta streetscape needs to be done vegetation arrangement because the vegetation in Soekarno Hatta Street has a high density of trees that will interfere with canopy growth when reaching the maximum size. Selection of appropriate shade vegetation and regular maintenance is expected to improve the comfort level in each way. In addition to vegetation, the physical condition of the pedestrian on Soekarno Hatta Road also needs a redesign to support the comfort of pedestrians.

scholarly journals IDENTIFIKASI IKLIM MIKRO DAN KENYAMAN TERMAL RUANG TERBUKA HIJAU DI KENDARI

NALARs ◽  
2019 ◽  
Vol 18 (1) ◽  
pp. 23
Author(s):  
Santi Santi ◽  
Siti Belinda ◽  
Hapsa Rianty
Keyword(s):  
Wind Speed ◽  
Relative Humidity ◽  
Open Space ◽  
Heat Island ◽  
Open Spaces ◽  
Temperature Humidity Index ◽  
Humidity Index ◽  
Urban Heat ◽  
The City

ABSTRAK. Fenomena UHI (Urban Heat Island) mengakibatkan suhu udara perkotaan menjadi tinggi, sehingga menurunkan kualitas lingkungan kota. Untuk dapat meningkatkan kualitas kota dan mengimbangi pertumbuhan kota, maka pemerintah menggalakkan pengembangan infrastruktur hijau perkotaan melalui pengembangan Ruang Terbuka Hijau (RTH). Kota Kendari memiliki beberapa ruang terbuka yang beberapa diantaranya merupakan pusat aktifitas dan interaksi masyarakat kota, diantaranya Taman Walikota dan Pelataran Tugu Religi. Penelitian ini merupakan penelitian deskriptif untuk mengetahui kondisi iklim mikro dan kenyamanan termal ruang terbuka. Data-data yang dikumpulkan berupa karakteristik dan nilai indikator iklim mikro yang meliputi suhu udara, kelembaban relatif, dan kecepatan angin pada sejumlah titik ukur pada siang hari. Data yang dikumpulkan dianalisis menggunakan uji Statistik Independent T Test untuk mengetahui perbedaan iklim mikro antara kedua lokasi dan analisis Temperature Humidity Index (THI) untuk mengetahui tingkat kenyamanannya. Hasil dari uji statistik menunjukkan tingkat perbedaan yang tidak sigifikan antara kedua lokasi, meliputi suhu udara (sig.=0,283); kelembaban relatif (sig.=0,115); dan kecepatan angin (sig.=0,105). Sementara itu, melalui analisia THI menunjukkan nilai index tidak nyaman hampir terjadi pada keseluruhan titik ukur. Nilai THI tertinggi pada lokasi Taman Walikota terletak pada titik A5 (THI=31,9), yaitu pada daerah memiliki kecepatan angin rendah karena posisinya pada bagian tengah kawasan. Sedangkan pada lokasi pelataran Tugu Religi, nilai terendah THI diperoleh pada titik B9 (THI=33,12), yakni titik yang sebagian besar material permukaan lahannya berupa aspal. Kata kunci: ruang terbuka, temperatur, angin, kelembaban relatif, Temperature Humidity Index ABSTRACT. The UHI (Urban Heat Island) phenomenon affected urban air temperatures become high, which decreases the quality of the city environment. To be able to improve the quality of the city and to balance the growth of the city, the government promotes the development of urban green infrastructure through the development of Green Open Space (RTH). Kendari City has several open spaces, some of which are the center of the activities and interactions of urban communities, including the Taman Walikota and the Pelataran Tugu Religi. This research is a descriptive study to determine the microclimate conditions and thermal comfort of open spaces. The data collected is in the form of characteristics and values of microclimate indicators which include air temperature, relative humidity, and wind speed at some measuring points during the day. The collected data were analyzed using the Independent T-Test Statistic Test to determine the differences in microclimate between the two locations and the Temperature Humidity Index (THI) analysis to determine the level of comfort. The results of the statistical tests show a significant level of difference between the two locations, including air temperature (sig. = 0.283); relative humidity (sig. = 0.115); and wind speed (sig. = 0.105). Meanwhile, through THI analysis, the uncomfortable index value almost occurs at the whole measuring point. The highest THI value in the location of the Taman Walikota is located at point A5 (THI = 31.9), which is in the area with low wind speed because of its position in the central part of the city. Whereas in the location of the Pelataran Tugu Religi, the lowest value of THI is obtained at point B9 (THI = 33.12), which is the point where most of the surface material in the land is asphalt. Keywords: open space, temperature, wind, relative humidity, Temperature Humidity Index 

scholarly journals Kajian tingkat kenyamanan berdasarkan termal humidity index (THI) lanskap Jalan Soekarno Hatta Kota Malang

2018 ◽  
pp. 243
Author(s):  
Rizki Alfian ◽  
Nuraini Nuraini
Keyword(s):  
Thermal Comfort ◽  
Physical Condition ◽  
Maximum Size ◽  
High Density ◽  
Comfort Level ◽  
City Area ◽  
Average Temperature ◽  
Humidity Index ◽  
The City ◽  
Selection Of

Study of the Comfort Level Based on Thermal Humidity Index (THI) of Soekarno Hatta Streetscape in Malang City. Streets as part of the city's landscape that support the function and activities of the city. Each street in the city area has a streetscape that aims to support the users activities. Soekarno Hatta street is one of the protocol street in Malang city which is quite famous and one of the crowded route in Malang City. This research aims to: 1) To identify vegetation on the streetscape on Soekarno Hatta street; 2) To analyze thermal comfort on the Soekarno-Hatta streetscape. Based on the observation, it is known that the trembesi population dominates at the Soekarno Hatta streetscape. Soekarno Hatta street has an average temperature of 31.1 ° C and an average humidity of 57%. Soekarno Hatta street has THI value of 28.43 whereas THI value which is categorized as comfortable is between 21 - 27. Based on the physical observation on Soekarno Hatta streetscape needs to be done vegetation arrangement because the vegetation in Soekarno Hatta Street has a high density of trees that will interfere with canopy growth when reaching the maximum size. Selection of appropriate shade vegetation and regular maintenance is expected to improve the comfort level in each way. In addition to vegetation, the physical condition of the pedestrian on Soekarno Hatta Road also needs a redesign to support the comfort of pedestrians.

scholarly journals Lack of vegetation exacerbates exposure to dangerous heat in dense settlements in a tropical African city

2022 ◽  
Author(s):  
Jonas Van de Walle ◽  
Oscar Brousse ◽  
Lien Arnalsteen ◽  
Chloe Brimicombe ◽  
Disan Byarugaba ◽  
...  
Keyword(s):  
Heat Stress ◽  
Vegetation Index ◽  
Daily Maximum ◽  
African City ◽  
Rapid Urbanization ◽  
Temperature Humidity Index ◽  
Populations At Risk ◽  
Humidity Index ◽  
Urban Heat ◽  
The City

Abstract Both climate change and rapid urbanization accelerate exposure to heat in the city of Kampala, Uganda. From a network of low-cost temperature and humidity sensors, operational in 2018-2019, we derive the daily mean, minimum and maximum Humidex in order to quantify and explain intra-urban heat stress variation. This temperature-humidity index is shown to be heterogeneously distributed over the city, with a daily mean intra-urban Humidex Index deviation of 1.2°C on average. The largest difference between the coolest and the warmest station occurs between 16:00 and 17:00 local time. Averaged over the whole observation period, this daily maximum difference is 6.4°C between the warmest and coolest stations, and reaches 14.5°C on the most extreme day. This heat stress heterogeneity also translates to the occurrence of extreme heat, shown in other parts of the world to put local populations at risk of great discomfort or health danger. One station in a dense settlement reports a daily maximum Humidex Index of >40°C in 68% of the observation days, a level which was never reached at the nearby campus of the Makerere University, and only a few times at the city outskirts. Large intra-urban heat stress differences are explained by satellite earth observation products. Normalized Difference Vegetation Index (NDVI) has the highest (75%) power to predict the intra-urban variations in daily mean heat stress, but strong collinearity is found with other variables like impervious surface fraction and population density. Our results have implications for urban planning on the one hand, highlighting the importance of urban greening, and risk management on the other hand, recommending the use of a temperature-humidity index and accounting for large intra-urban heat stress variations and heat-prone districts in urban heat action plans for tropical humid cities.

scholarly journals Kajian Hutan Kota Malabar terhadap Kenyamanan Termal

2020 ◽  
Vol 3 (1) ◽  
pp. 21
Author(s):  
Eduardo Hilario Bado Towary ◽  
Roedy Sulistyono ◽  
Sama’ Iradat Tito ◽  
Muh. Agus Ferdian
Keyword(s):  
Thermal Comfort ◽  
Thermal Condition ◽  
Open Space ◽  
Green Space ◽  
Tree Level ◽  
Vegetation Types ◽  
Vegetation Analysis ◽  
Humidity Index ◽  
Important Value Index ◽  
The City

<pre>Comfort is something that humans need without exception when in a Green Open Space (RTH). Thermal comfort is a thermal condition felt by humans that is influenced by the environment. The existence of green space such as the City Forest of Malabar needs to be measured about it which can define its feasibility. (1) To examine the effect of thermal comfort in the Malabar forest on the community. (2) Analyzing vegetation in the Malabar city forest related to comfort. The results obtained in this study are the Temperature humidity index (THI) of respondents in the Malabar city forest known to average values of 22.42. It can be categorized that the Malabar city forest has a comfortable condition because in the index range 21 to 24. The analysis of the vegetation analysis in the Malabar city forest is concluded for the predominant vegetation sapling level, ie the pole glodokan plant with an important value index of 6.69. Whereas the pole level that dominates is mahogany with an important value index of 6.66. As for the tree level, the dominant vegetation types are plants with an important value index of 127.91</pre>

scholarly journals The Effects of Green Roofs on Outdoor Thermal Comfort, Urban Heat Island Mitigation and Energy Savings

Atmosphere ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 123 ◽  
Author(s):  
Guglielmina Mutani ◽  
Valeria Todeschi
Keyword(s):  
Surface Temperature ◽  
Thermal Comfort ◽  
Urban Heat Island ◽  
Land Surface Temperature ◽  
Land Surface ◽  
Green Roofs ◽  
Heat Island ◽  
Urban Context ◽  
Urban Heat ◽  
The City

There is growing attention to the use of greenery in urban areas, in various forms and functions, as an instrument to reduce the impact of human activities on the urban environment. The aim of this study has been to investigate the use of green roofs as a strategy to reduce the urban heat island effect and to improve the thermal comfort of indoor and outdoor environments. The effects of the built-up environment, the presence of vegetation and green roofs, and the urban morphology of the city of Turin (Italy) have been assessed considering the land surface temperature distribution. This analysis has considered all the information recorded by the local weather stations and satellite images, and compares it with the geometrical and typological characteristics of the city in order to find correlations that confirm that greenery and vegetation improve the livability of an urban context. The results demonstrate that the land-surface temperature, and therefore the air temperature, tend to decrease as the green areas increase. This trend depends on the type of urban context. Based on the results of a green-roofs investigation of Turin, the existing and potential green roofs are respectively almost 300 (257,380 m2) and 15,450 (6,787,929 m2). Based on potential assessment, a strategy of priority was established according to the characteristics of building, to the presence of empty spaces, and to the identification of critical areas, in which the thermal comfort conditions are poor with low vegetation. This approach can be useful to help stakeholders, urban planners, and policy makers to effectively mitigate the urban heat island (UHI), improve the livability of the city, reduce greenhouse gas (GHG) emissions and gain thermal comfort conditions, and to identify policies and incentives to promote green roofs.

scholarly journals Environmental source of stress in livestock productivity - a study of Minna climate data

2018 ◽  
Vol 34 (2) ◽  
pp. 159-170 ◽  
Author(s):  
Sikiru Babatunde ◽  
Egena Acheneje ◽  
Alemede Comfort ◽  
Makinde John
Keyword(s):  
Oxidative Stress ◽  
Heat Stress ◽  
Livestock Production ◽  
Mitigation Strategies ◽  
Climate Data ◽  
Stress Genes ◽  
Temperature Humidity Index ◽  
Humidity Index ◽  
Livestock Productivity ◽  
The Tropics

Stress emanating from environment is a factor limiting livestock productivity in the Tropics because of elevated temperature year round; hence this study took a look at Minna climate data for evaluation of Temperature-Humidity- Index (THI) as a way of identifying climate source of stress on livestock production. Climate Normals for Minna between years 1961 and 2018 were obtained, and the data were analyzed using general formulae for calculating Temperature-Humidity-Index for livestock production. Relationships between production parameters on commercial farms and the THI data indicated that heat stress is a potential cause of oxidative stress in the area. The THI showed that the environmental conditions in the study area has potential for heat stress on animals, and that it can aggravate oxidative stress in livestock under production in the study area, hence there is need for further studies to identify the pathophysiological mechanisms of heat stress so as to develop mitigation strategies for improved animal performance and productivity. The study suggested that instead of the penchant for importing exotic breeds of livestock with the aim of upgrading the indigenous breeds, the way forward could be the utilization of genetic expression of heat and oxidative stress genes in animals as candidate markers for improvement of their productive potentials.

Human thermal comfort in Local climate zones of Berlin

2020 ◽  
Author(s):  
Ines Langer ◽  
Alexander Pasternack ◽  
Uwe Ulbrich
Keyword(s):  
Thermal Comfort ◽  
Urban Heat Island ◽  
Urban Areas ◽  
Heat Island ◽  
Climate Zones ◽  
Local Climate ◽  
Human Thermal Comfort ◽  
Local Climate Zones ◽  
Urban Heat ◽  
The City

&lt;p&gt;Urban areas show higher nocturnal temperature comparing to rural areas, which is denoted by urban heat island. This effect can intensify the impact of global warming in urban areas especially during heat waves, that leads to higher energy demand for cooling the building and higher thermal stress for residents.&amp;#160;&amp;#160;&lt;/p&gt;&lt;p&gt;The aim of this study is to identify the Urban Heat Island (UHI) effect during the heat spell 2018 and 2019 in order to calculated human thermal comfort for Berlin. Berlin, the capital city of Germany covers an area of 892km&lt;sup&gt;2&lt;/sup&gt; and its population is growing, therefore more residential areas will be planned in future through higher building. The methodology of this research is to divide Berlin into Local Climate Zones (LCZ's) regarding the concept of Stewart &amp; Oke (2012). Then to evaluate the accuracy of this concept using 30 microclimate stations. Estimating the magnitude of urban heat island and its seasonal changes in combination with human thermal perception in different LCZ during summer time is another objective of this research.&amp;#160;&lt;/p&gt;&lt;p&gt;Ten LCZ's for Berlin were selected, as class 1 (compact high rise), class 3 (compact low rise), class 7 (lightweight low-rise), class C (bush, scrub), class E (bare rock or paved) and class F (bare soil or sand) don't exist in Berlin. Class A (dense trees) is with a fraction of 18.6% in a good agreement with the percentage of dense trees reported from the city administration of Berlin (18.4%), class G (water) has a coverage of 5.1% through our classification instead of 6.7% reported by the city administration. In summary, the LCZ 1-10 cover 59.3% (more than half) of the city area.&lt;/p&gt;&lt;p&gt;Regarding temperature measurements, which represent a hot summer day with calm wind and clear sky the difference of Local Climate Zones will be calculated and the temperature variability in every LCZ's regarding sky view factor values show the hot spot of the city.&lt;/p&gt;&lt;p&gt;The vulnerability of LCZ's to heat stress will be ranked and discussed regarding ventilation and other factors.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;Literature&lt;/p&gt;&lt;p&gt;Matzarakis, A. Mayer, H., Iziomon, M. (1999) Applications of a universal thermal index: Physiological equivalent temperature: Intern. J. of Biomet 43 (2), 76-84.&lt;/p&gt;&lt;p&gt;Stewart, I.D., Oke, T.R. (2012) Local climate zones for urban temperature studies. Bull. Amer. Meteor. Soc. 93 1879-1900. DOI: 10.1175/BAMS-D-11-00019.1.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;

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