Heritage buildings are subject to severe damage due to their exposure to dynamics such as environmental changes, earthquakes, structural loads, etc., thus needing a proper maintenance and management system. However, during the restoration, maintenance, and management process, heritage building practitioners face numerous challenges, such as inefficient project management, financial loss, and project delay. These problems arise due to a lack of digital documentation and updated information management systems. Heritage building management still uses traditional management techniques where heritage information is managed using multiple format systems by different professionals, thus missing collaboration, information integration, and interoperability. Building information modeling (BIM) is presented here as a supporting tool to address these issues. The aim of this study is to develop a novel HBIM framework to manage heritage buildings in an integrated and interoperable environment that supports 3D digital documentation to conserve a heritage building and facilitate restoration planning and facility management (FM) activities. Moreover, we demonstrate FM integration with BIM to promote this digital technique. The results indicate that the proposed framework is feasible and effective in providing information integration and communication between stakeholders in managing heritage buildings.

The building construction industry contribute substantially toward the exhaustion of most of the natural resources and water is one of them. Unsustainable water uses in buildings during its operation phase augmenting water resources consumption and degradation. To reduce resource consumption and harmful environmental impacts; green buildings construction is being promoted. Water conservation is one of the important components in the design of green buildings to save freshwater and satisfy the increasing demand for water. United States (U.S.) green building reference guide rating system contains 11 points out of 110 points for water efficiency for building design and construction. Considering these facts, this study aims to analyze water consumption and conservation potential in the Center for advanced studies during operational phase in the city Jamshoro. Water consumption by occupants during working hours has been assessed. Two scenarios were developed to assess and calculate water use in existing infrastructure and then compared with criteria provided by Leadership in Energy and Environmental Design (LEED) guidelines for new construction and design. It has been observed that currently no proper provision is provided for water reuse or recycling and ordinary water consumption fixtures are used. Results show that 33.50% of total consumed water can be saved by using LEED design and construction criteria. Moreover, grey water reuse can also reduce freshwater consumption 42-25% in both scenarios. Grey water reuse and reducing indoor water consumption in the building can help to conserve water. Such water usage systems will not only help to reduce energy cost but also contribute positively toward ensuring future availability of resources and improve environmental performance. Keywords Building operation • Water conservation • Water efficient techniques • Green building • Environmental performance List of symbols W wcsf Water consumption water closets single flush C f Capacity per flush t n Number of times used O n Number of occupants D n Number of days per week/month WCSF n Total number of water closet W wcdf Water consumption water closets single flush WCDF n Total number of water closet W u Water consumption from urinal U n Total number of urinals W bs Water consumption from bidet spray Q Flow rate (gallons per 15 s) BS n Total number of bidet spray W lf Water consumption from lavatory faucet LF n Total number of lavatory faucet W kf Water consumption from kitchen faucet KF n Total number of kitchen faucet * Bushra Danish Talpur,

Rapid and unplanned urbanization results into spread of urban sprawls and illegal encroachment issues. Illegal construction is problematic, as it creates issues of traffic congestion, sewerage, price hikes and etc. In case of Hyderabad city the encroachment has severely damaged the cultural heritage of the city, as the city has large number of historic heritage. Talpur's tombs are no exception. Therefore, this research is aimed identify the recurring issues Mir's Tomb of Hyderabad and find the flaws in the implementation of the Sindh Cultural Heritage (Preservation) Act, 1994. To achieve this aim, study has used thematic content analysis is being done, 16 interviews were conducted from the field experts, stake holders, academicians and office holders. The collected data was analyzed in the NVIVO software, results showed six themes of recurring issues, namely administrative, environmental, man-created, policy and legislation, physical and social constraints.