92
M. D. Setiawati et al.
Fig. 6.2 Number of days above 34 °C per year from 1980–2015 in Medan City. Data source Meteorological agency of Indonesia 2016, five meteorological stations
6.5 Vulnerability Data Sources
Developed in this paper, the HVI is estimated based on the aggregation of groups of
parameters. First one, the exposure to the heat such as heat stress index UTCI and
UHI. Second one, the sensitivity to heat such as socio-demographic structure. Based
on the literature review indicators satisfactorily reflecting the relation between heat
and health, and applicable based on existing data sources, 13 variables were selected.
6.6 Heat Stress Index
The heat stress index was measured by UTCI which is defined as a function of temperature, humidity, solar radiation, and wind speed (Fiala et al. 2012)(Bröde et al.; 2012,
2013), described by Eq. 6.1:
UTCI = f (t; RH; Tmrt; v) = t + of f set (t; RH; Tmrt; v)
(6.1)
Note: f means function
the original equation is very long, you can access here: https://drive.google.
com/file/d/1zsySSC8J8t1wAe5eVsz1WASXHJo9aRTo/view?usp=sharing or here:
https://www.ladybug.tools/ladybug-comfort/docs/_modules/ladybug_comfort/utci.
html. All calculation was conducted by Bioklima package 2
M. D. Setiawati et al.
Fig. 6.2 Number of days above 34 °C per year from 1980–2015 in Medan City. Data source Meteorological agency of Indonesia 2016, five meteorological stations
6.5 Vulnerability Data Sources
Developed in this paper, the HVI is estimated based on the aggregation of groups of
parameters. First one, the exposure to the heat such as heat stress index UTCI and
UHI. Second one, the sensitivity to heat such as socio-demographic structure. Based
on the literature review indicators satisfactorily reflecting the relation between heat
and health, and applicable based on existing data sources, 13 variables were selected.
6.6 Heat Stress Index
The heat stress index was measured by UTCI which is defined as a function of temperature, humidity, solar radiation, and wind speed (Fiala et al. 2012)(Bröde et al.; 2012,
2013), described by Eq. 6.1:
UTCI = f (t; RH; Tmrt; v) = t + of f set (t; RH; Tmrt; v)
(6.1)
Note: f means function
the original equation is very long, you can access here: https://drive.google.
com/file/d/1zsySSC8J8t1wAe5eVsz1WASXHJo9aRTo/view?usp=sharing or here:
https://www.ladybug.tools/ladybug-comfort/docs/_modules/ladybug_comfort/utci.
html. All calculation was conducted by Bioklima package 2