en.Wedoany.com Reported - In the construction of plateau highways, Qinghai Province has implemented refined ecological restoration and source control measures to promote the coordinated advancement of transportation development and ecological protection in the reconstruction project of the Reshui to Jiangcang section of the Haixing to Tianjun Highway (referred to as the Rejiang Project).
The Rejiang Project is a key component of National Highway 338 and one of the 60 east-west horizontal lines in China's national ordinary highway network, serving cross-provincial transportation functions. The project route runs east-west, spanning over 102 kilometers, constructed to Class II highway standards with a design speed of 40 km/h and a construction period of 2 years.
To minimize the impact of construction on the ecological environment along the route, the project focuses on key ecological restoration aspects, comprehensively advancing three core greening projects: planting grass with coconut fiber blankets on lower slopes, using vegetation concrete slope greening technology for spray-seeding on upper slopes, and planting grass on historically abandoned material pits within the road area. Technically, the project has invited industry experts for on-site guidance and collaborated with local forestry and grassland departments for technical exchanges and discussions. In terms of grass species selection, based on the cold, high-altitude climate characteristics, the project has chosen four resilient native grass species—short-awned Elymus, Chinese fescue, cold-region bluegrass, and dryland bluegrass—mixed and sown in a 2:1:1:1 ratio, while simultaneously conducting trial planting to verify quality.
In source control, the project adheres to the "minimal disturbance" principle during the design phase, fully utilizing the existing alignment of National Highway 338, optimizing earthwork allocation plans, and avoiding the addition of new borrow or spoil sites. During the preparatory phase, priority was given to leasing local old factories as temporary camps, reducing temporary land occupation by approximately 488 mu. In terms of extended management, the project has proactively treated and revegetated 263 abandoned material pits beyond the original design, in addition to completing ecological restoration of 178 designed pits. Furthermore, the project has replaced traditional concrete protection with reinforced gabion protection, reducing concrete usage by over 5,500 cubic meters; conducted two rounds of fish stocking in the Datong River, releasing a total of 85,000 Gymnocypris eckloni; and installed artificial eagle nests in suitable areas along the route to provide habitats for wild raptors.
Currently, all construction tasks of the Rejiang section are progressing steadily and orderly. Going forward, the project will continue to strictly uphold the ecological protection bottom line, regularly advancing grass planting, revegetation, and ecological maintenance work.
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