One of the key measures to fight urban heat island (UHI) phenomenon is by increasing the use of green approaches including green technologies and vegetation. However, there is a shortage of available space for establishing greening elements due to high density of urban development and high cost of urban land. By using green roofs, the hottest spots of a city can be mitigated. Further advantages of green roofs include mitigating air pollution, improving management of run-off water, improving public health and enhancing the aesthetic value of the urban environment. This paper reviewed, analyzed, and discussed previous literature on green roofs and their role in alleviating UHI. Previous researches acknowledged the ability of green roofs in UHI mitigation. This paper recommends using green roofs as a main strategy for decreasing the harmful impacts of UHI especially the high air temperatures as well as their ability to add to the greening of cities.
Low-lying agricultural land frequently encounter severe water quality and drainage problems caused by many factors including stagnation of wastewater, rain and flooding from rivers. The research was mainly concerned with the change of household wastewater quality in drainage canals in accordance with the promotion of small-scale rural sewage systems . The study was conducted in the Hirata Town of Takasu Waju area of Gifu prefecture. Waju is the farming settlement protected by the circular dykes. Hirata town is famous for its sightseeing spot, Ochobo Inari (Shrine), where many people visit , is expected to have pollution from its wastewater. In order to clarify the increase or decrease of household wastewater pollution , we investigated 13 spots of the drainage canals of the study area after considering the inflow and outflow of the drainage water . The daily pollution load of water quality parameters were calculated for each survey month. Results showed that pollution load of community decreased year by year as a result of wastewater treatment plant and near future if utilization percentage increase , water quality in drainage canals would be more improved. However, water quality improvement in the downstream section could not be seen from the past five years data. Countermeasure should be taken to improve the overall water quality in the study area .
Japanese alluvial area has been an excellent agricultural zone but subjected to complex problems such as drainage, salinity and water quality due to its natural low-lying and flat characteristics. These problems are worsened by the modern economical development and severe relations between water supply and demand press the shortage of water for agricultural use continuously. Consequently, traditional water order in the coastal field which controlled skilfully the uprising of salt from salinized underground layer by the intrusion of seawater to surface layer is getting worse and remarkable risk of salt injury would be increased. The objective of this study is to present a proposal for necessary countermeasures to maintain agricultural productivity in the alluvial area. Two fields were selected near the Naruto Straits with salinity problem in underground layer originated from tidal river. In first case at the Magota River improvement project on western Awaji Island, it become clear that some device like upper and lower layer not to be mixed at construction works are necessary to avoid the uprise of saline groundwater in a range from the river mouth to upstream 600m. In second case at Kawauchi district on the most downstream of the Yoshino River, we considered it is necessary a high level of countermeasure that distributes sufficient fresh water as multipurpose use of irrigation water that include the customary salt exclusion water.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.