Hasti Widyasamratri

This research aimed to simulate scenario of green open space to mitigate heating within microclimate performance. It also optimized the composition of the built environment's surface to reduce urban heating. A numerical model was simulated using ENVI-met, and spatial analysis was conducted with ArcGIS software. Three different scenarios were established to propose solutions for heating reduction. Simulation showed that a balanced composition between buildings and vegetation resulted in air temperature decrease of 2.45°C to 3.31°C compared to no-greenery simulation. Meanwhile, when compared to the existing situation, hybrid greenery achieved a 3.50°C air temperature decrease. This research offered valuable insights into the urban environment by prioritizing landscape design, focusing on buildings and the composition of green open space in surrounding areas

The aim of this study is to investigate the impact of the construction industry on the environment in Malaysia and propose strategies for mitigating its adverse effects through the adoption of sustainable building techniques. The study recognizes the importance of a healthy ecosystem in promoting health conditions, improving living standards, and ensuring a sustainable future for the nation. However, the recent population expansion has placed increased pressure on Malaysia's building industry and infrastructure, resulting in environmental degradation caused by the construction sector. To address this issue, the study examines the overall framework of ecological management implemented in Malaysia's construction industry. It evaluates key aspects of construction management, including the formulation and implementation of environmental policies, the involvement of stakeholders in decision-making processes, and the effective management of construction waste. Additionally, the study conducts a comprehensive assessment of specific regulations and guidelines pertaining to construction waste, water contamination, and air pollution, all of which are prevalent issues in Malaysia's construction activities. Furthermore, the study highlights the benefits of using green materials in construction to minimize environmental impact and enhance overall quality of life. It explores the implementation of green technologies in Malaysia, considering their advantages and disadvantages within the local context. By doing so, the study aims to provide insights into the challenges faced in the widespread adoption of green technologies, taking into account the perspectives of the government, economy, society, and available resources. Ultimately, the study emphasizes the need for collaboration among all stakeholders to address environmental damage effectively. It stresses the importance of an inclusive approach, ensuring that no one is left behind in the efforts to rectify the situation and prevent further deterioration of the environment. By taking proactive measures and implementing sustainable building techniques, it is hoped that the construction industry in Malaysia can contribute to a greener and more sustainable future for the nation.

This research aim to investigate the urban thermal environment profile and land cover classification in the Jakarta Metropolitan Area (JMA) in 1989 and 2013. Thermal environment conducted by installing fix point ground measurement of air temperature and land surface temperature. The land cover classification was carried out by using Landsat TM 5 and Landsat 7 ETM+ data sets. The diurnal variation of air temperature shows that Urban Heat Island (UHI) was occurring in urban and suburban JMA, which can be seen the slower cooling period in the urban area than suburban areas. Positive correlation between air temperature (Ta) and land surface temperature (Ts) on the brush (r2 = 0.78) and the asphalt surface (r2= 0.88) is clearly shown during the study. The rapid urbanization was detected during 1989 to 2013 where the urban sprawl is spread over to the whole area of JMA. Urban built up is the dominant of high increase due to years, while vegetation is decreasing.

The outdoor thermal performance reflects the microclimate condition in any significant area. This study simulated the thermal performance with measured and modeled three meteorological parameters, air temperature (Ta), relative humidity (RH), and wind speed in the dry season tropical city. The research focused on thermal performance simulation and distribution, here, we were neglecting anthropogenic activities as the heat source. The result showed that there were different ranges between a measured and simulated value of Ta, RH, and wind speed. The highest Ta difference between measure and simulation occurred at 11 AM, which was 1.97⸰C. The highest difference of RH occurred at 13 PM (26.75%), and the highest different of wind speed was at 11 AM (0.37 m/s) respectively. The heat distribution in the focus area was influenced by the solar direction which impacted the ground and near-surface air temperature.

Indonesia is an area prone to landslides. The occurrence of this landslide disaster can cause a large impact such as damage and loss both material and non-material. The availability of complete and accurate information in controlling land use in landslide prone areas in the development of an area becomes very important in minimizing the loss of life and losses, both physical, social and economic. This information must be disseminated to the community as an early warning system in disaster mitigation efforts. Identification of the characteristics of landslide prone areas requires a risk mapping of landslide prone areas in efforts to mitigate disasters can be done using Geographic Information Systems (GIS). The results in this study indicate the need to identify disaster risk in detail because basically, an area threatened by disaster does not necessarily mean that each community has the same level of disaster risk. Mapping can be done by clustering or by identifying each building in a vulnerable area based on the level of risk of landslides. Keywords: risk analysis, landslides, disaster mitigation, GIS ABSTRAKIndonesia merupakan wilayah yang rawan terhadap bencana longsor. Terjadinya bencana longsor ini dapat menyebabkan dampak yang besar seperti kerusakan dan kerugian baik materiil maupun non materiil. Tersedianya informasi yang lengkap dan akurat dalam pengendalian pemanfaatan lahan di kawasan rawan bencana longsor dalam pengembangan suatu wilayah menjadi hal yang sangat penting dalam meminimalisir adanya korban jiwa dan kerugian-kerugian baik fisik, sosial maupun ekonomi. Informasi tersebut harus disebarkan kepada masyarakat sebagai sistem peringatan dini dalam upaya mitigasi bencana. Identifikasi karakteristik daerah rawan longsor diperlukan sebuah pemetaan risiko kawasan rawan longsor dalam upaya mitigasi bencana dapat dilakukan menggunakan Sistem Informasi Geografis (SIG). Hasil dalam penelitian ini menunjukkan perlunya identifikasi risiko bencana secara detail karena pada dasarnya, suatu kawasan yang terancam bencana belum tentu tiap masyarakatnya mempunyai tingkat risiko bencana yang sama. Pemetaan dapat dilakukan dengan pengklusteran maupun dengan identifikasi setiap bangunan dalam kawasan rawan berdasarkan tingkat risiko terhadap bencana tanah longsor.Kata Kunci: analisis risiko, tanah longsor, mitigasi bencana, GIS

Coastal is the most vulnerable area in climate change, with no exception in Coastal Java island. Reveal, 65% of the Java island population is to be vulnerable to coastal hazards such as tidal flood. The northern Java coastal area has a significant position in logistic connectivity throughout areas in the entire Java island. Abrasion and sedimentation are the most frequent effect were impacted to the coastal land cover (i.e. ponds, mangrove forest, and settlement). However, there is a lack of awareness among local communities, although they directly impact of those hazards. This study aims to identify local community knowledge of coastal disaster mitigation in Mangunharjo, Tugu sub-district Semarang, by using quantitative methods. Field observation and a simple descriptive statistic were used to analyze. The result showed that the majority of the respondents has high vulnerability on coastal hazard and disaster since they are living very close to the coastal water body.

Green Open Space is an urban expanse covered by some of the trees as a shade area of the city and as the fulfillment of the needs public spaces for the community in activities and social. Efforts continue to be undertaken by the Green Open Space embodiment of Government, one that is by pioneering the implementation of ‘Program Pengembangan Kota Hijau’(P2KH) in improving the quantity and quality of Green Open Space in the area of the county or city. One form of Green Open Space i.e. the garden city that serves to improve the quality of urban and support the needs of the community in getting space to relax and leisure. The condition of children in district Kendal based on information from the community a lot of damage to either the environment or the facilities therein. This study aims to evaluate the application of Green Open Space on quality Grounds in the ‘Program Pengembangan Kota Hijau’(P2KH) sub district of Kendal which consists of the Stadion Utama, Langenharjo and Gajah Mada Parks. The method used was qualitative with deductive approach to rationalistic Unitarians. The analysis used a descriptive analysis i.e. qualitative and verification. Results from the study found that: 1) implementation evaluation results of Green Open Space in the gardens of the town Kendal not optimal, particularly on the Stadion Utama and Langenharjo Parks is still passive because it has not been supported with supporting facilities ; 2) evaluation results applying the Green Community is not optimal because there hasn't been an active ongoing activities so that it can not realize the active role of the community as a community in realizing the green city in district of Kendal; 3) factors that influence the application of optimal yet Green Open Space that is the location of the parks are not on the main road, the spread of vegetation are not optimal in improving microclimate because the settings are less noticed aspects of the function and benefits, passive Parks conditions due to lack of support facilities and the lack of appeal on the parks because the Setup and the pattern of plants that don't meet aesthetic; 4) factors that influence has not been optimal application of the Green Community that is constrained funds and lack of public awareness in maintaining and safeguarding the environment.

Keywords: Urbanization, heat island, dry island, Jakarta, observational analysis Recent population increases in urban areas of Asian countries have extended artificial land cover, increased energy consumption, and caused various problems. Higher air temperatures over urban areas (heat islands) degrade residential environments and affect human health. In Jakarta, the largest city in Indonesia and the second largest city in Asia, previous studies have relied on only a few observation points and physically-based models. To study the thermal environment in Jakarta in more detail, we performed seven fixed-point temperature and humidity observations from the dry to the pre-monsoon season (from 16 September to 18 October) in 2012. Over densely urbanized areas, higher temperatures and lower humidity were observed around noon compared with the sparsely urbanized areas. The maximum differences in temperature and specific humidity were found to be around 3 °C and 0.005 kg/kg, respectively. The differences in temperature and humidity became smaller in the afternoon because of the penetration of sea breezes. At night, the differences became larger again because the sea breeze weakened. Then, a difference of around 3°C was observed, except in the early morning. Although the difference in daytime temperature was smaller between densely urbanized areas and suburban areas, similar tendency was also confirmed in the daily time series averaged for sunny days in dry season.