Kampus ITB Ganesha sudah memiliki fasilitas tap water yang diresmikan pada tahun 2005. Adanya tap water diharapkan dapat memberikan dampak yang baik terhadap pengadaan dan pemanfaatan air bersih dan mengurangi timbulan sampah plastik kemasan air minum. Untuk menilai kesadaran mahasiswa terhadap pentingnya pemanfaatan dan pengadaan air bersih serta dampak lingkungan, perlu dilakukan studi valuasi terhadap public goods tersebut dengan menilai kesediaan membayar (Willingness to Pay). Metode yang digunakan dalam studi ini adalah CVM (Contingent Valuation Method). Pelaksanaan studi dilakukan dengan melibatkan 7 Tim dengan metode kuesioner. Analisis statistika data dilakukan dengan menggunakan pemodelan regresi logistik. Hasil studi menyatakan bahwa penentuan biaya air minum (tap water) yang dilakukan mencapai kriteria 90%-10% melalui bidding games adalah dengan pembagian layer menjadi 5, yaitu:
The availability of green space is decreasing along with the increase in population. Since then the land has been replaced by buildings as more people need a place to support human activities. As a result, the absorption of heat increases, causing the temperature in urbanized areas are higher relative to outlying areas (Urban Heat Island). Therefore, some efforts need to be made to reduce heat absorption, one of which is by applying the green roof. A strong roof structure and roof panel are required to implement green roofs. Wood is a material that has both strength and lightweight. However, the use of wood panels for roofing is not common in tropical areas due to the high rainfall. The wood roofing still has a potential to be used through the application of green roof technology that accommodate a waterproof layer and is not easily degraded by planting media. This study aims to examine the potential use of green roofs which made of wood structures and wood roofing in a tropical climate.
Recently, The construction industry is growing rapidly in the world, including in Indonesia. The construction of high-rise buildings, industry, and housing certainly has an impact on the environment, one of which is the lack of rain catchment areas. The green building concept is expected to reduce energy consumption significantly through several methods of passive design and active design without sacrificing comfort and productivity due to energy savings. One solution to support the concept of green building is the application of green roofs in buildings. Green roof is a building construction where there is a planting medium and vegetation on the roof. The most important green roof capability is the ability to withstand and hold rainwater, especially in urban areas and reduce energy consumption. This study provides an overview of the differences between extensive and intensive types of green roofs, the potential benefits of green roof applications on water quantity and quality, environmental impacts, opportunities and challenges of green roof applications, and economic benefits. Based on this positive aspect, it can be concluded that green roof is one of solution to reduce the environmental impact of buildings, save money, and save water reserves.
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