Abstract
Currently, irrigation and hydropower are important economic and social development sectors that improve the quality and efficiency of people's life in the world as well as Vietnam. Vietnam has constructed around seven thousand reservoirs to date for many purposes such as water supply, flood control, or hydroelectric power. These reservoir construction projects play an important role in using water resources effectively and efficiently. However, many of these projects have been facing construction delays or increasing investment capital. This study aims to investigate the main causes of construction delay of reservoir projects through data collected from 310 valid respondents. Based on comprehensive literature review, this study identified and assessed a total of 37 primary causes which were grouped into six categories, namely, design phrase (six causes), construction phrase (five causes), human factors (five causes), technical factors (10 causes), legal factors (three causes), and external factors (eight causes). The results of regression analysis indicated that causes of technical, external, and human categories were the main causes of construction delays in reservoir projects. In conclusion, this study was useful for both academics and practitioners in exploring the important causes in reservoir construction projects which can help decision-makers reduce construction delays and use resources efficiently.
Highlights
Irrigation and hydropower are important economic and social development sectors that improve the quality and efficiency of Vietnamese people’s life
This research shows that the most influential factor in construction delays is technical factors: unreasonable construction schedule, organize construction method, etc. This happens mostly on the existing irrigation and hydropower construction project, especially construction schedule and measures to coordinate motorcycles and construction equipment on sites. It shows that training engineers in professional construction progress is essential
This research finds out main external factors influencing project delays are: Hydrological and flow conditions, slowness in decision making process by owner
Summary
Irrigation and hydropower are important economic and social development sectors that improve the quality and efficiency of Vietnamese people’s life. Irrigation and hydropower projects are examples of general outcomes, and they have close working relationships with many people in a variety of fields, including planning, scientific research, surveying, designing, manufacturing, construction, and exploitation management. These projects include many different fields of construction science and technology and have the main following characteristics: (1) huge construction volume with large scale; (2) investment capital is often enormous according to the conditions of each region; (3) contain numerous items, materials, tasks; (4) high-quality requirement; (5) construction conditions difficult; and (6) construction duration is often short. Some of works which are in preparation stage of project such as Ban Mong (Nghe An Province), upper Krong Pach reservoir
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