The performance of green roof with urban heat island

Abstract

The temperature of metropolitan area continues to enhance because of the heat island incident. The practical high temperatures increase the energy problem of metropolitan area, deteriorate comfort conditions and amplify the pollution problems. To counter balance the observable facts, significant mitigation technologies have been developed and projected. Among them, the use of green roofs appears to be extremely promising, presenting comparatively high heat island mitigation prospective. Urban heat island has usually used the distinction plants index as the indicator of plants large quantity to approximation the land surface temperature plants relationship. This study examines the applicability of plants portion derivative from a spectral combination model as another marker of plants abundance. Urban Heat Island has important impacts on the buildings energy utilization and outside ambient air quality .A variety of approaches, as well as observation and simulation techniques have been projected to understand the causes of urban Heat Island formation and to find the corresponding improvement strategies. This paper presents an assessment of the techniques used to study urban Heat Island. The abilities and restrictions of each approach for the exploration of urban Heat Island improvement and forecast are discussed. The treatment of important parameters together with latent, sensible heat in addition to behavior of radiation, effect of vegetation and pool.