The South-to-North Water Transfer Canal Project is very important to the water
resources distribution of China, and may bring many environment problems.The
paper studied the Jiping Canal which was the first construction segment and passed
state acceptance earliest of the east route of South-to-North Water Transfer Canal
Project. The goal is to ensure the safety, stability and ecological harmony of the
long-distance water transfer project. In order to solve the variety of ecological
restoration issues exist for the construction of water diversion project and operational
management process, different knowledges of the soil and water conservation, botany,
restoration ecology, landscape ecology, landscape architecture and other
multi-disciplinary knowledge were used. A systematic study to the ecological
restoration of the water diversion project was carried through combining the basic
data collection, theory research, on-site investigation sampling and analysis
experiment combined with engineering practice. The main conclusions are as follows:
（1）In order to solve the safety and stability problems of the different sections
of the large-scale water transfer Canal, combinded with the ecological disturbance ,
site factors and site types in the study area were analyzed. The entire project area is
divided into five site types and the 70 plots. The ecological restoration programs were
determined based on the site types and slope stability requirements.
（2）Due to the actual situation and the ecological restoration needs of Diao
hillside high and steep slopes in Jiping main canal, the trinity high and steep slope
ecological restoration of “steep reinforced solid + slope cross-sectional flood
drainage + Plant ecological protection" in steep slope segment was applied concretely
and had a well overall protective effect.
The integrated technology of taking reinforcement, offload, dense and
waterproof in one was reinforced in the high and steep slope. The entire average slope gradient was controlled between 1:2 and 1:2.5 to ensure the safe operation of the
drains in high and steep slope. The technology of slope less charge and one-way
TGDG50 slope reinforcement adopted in the test functioned effectively. The treated
sliding coefficient under normal operating conditions was 1.38.
For the effective discharge of the slope precipitation, a drainage system
composed of three parts by the above cut-off drainage outfalls, drain slope drainage
and drains protection works in high and steep slope, achieve the desired results
indicated a good drainage effect.
The technology using fiber network hydraulic spraying slope stabilization had a
fast adaptability, fast turf, good vegetation restoration effect especially in the gravel
slope revegetation on high and steep slope and achieve the desired results showed a
good ecological repair function.
（3）The technology of dry root net ecological slope protection and tanza
vegetation net ecological slope protection was studied based on the analysis of floods
on the Yellow River floodplain levees effect and applied in the ecological protection
of the Jiping main canal levees.
Based on the study of three species of Jilin seedling willow, vertical explosive
willow and Shandong speed raw willow, the dry root seedlings stem system composed
of the three seedling willow stem had the characteristics of fast forest forming, rapid
growth, effectively soil conservation and so on. For Jiping main canal, Shandong
fast-growing willow is suitable for the dry root seedlings stem system.
The test analysis of protection effect for the three grass species (tall fescue + mixed
ryegrass, white clover and bermudagrass) indicated that the best ecology protection
effect was bermudagrass + tanza vegetation net.
（4）Based on the analyzing of the non-conveyance section in the Jiping Canal of
South-to-North Water Diversion Project, we proposed 4 modes, 7 series and 22 kinds
of plant configuration modes including grass slope protection, arbor and grass slope
protection, shrub and grass slope protection and arbor shrub and grass slope
protection for the different actual situation and the ecological restoration demand of
the different channels. At the same time, we proposed the corresponding plant
configuration technology. The width of grass family (BG) was as follows: planting bermudagrass above
within the channels of the left embankment berm slope, planting trees on the left
lateral and twin row strip of dike road (selection of tree species Ligustrum, Sophora
japonica, fast-growing willow etc.) as street trees, planting trees on the right side of
the berm and on the top of dike channels (selection of tree species Sophora japonica,
fast-growing willow, Fatong, ash, poplar etc.) constituting the ecological shelter forest
net, planting dry root network in the outer slope of the right side of the dike, planting
Juju inside right side of the land acquisition line as the protective ecological fences.
The width of shrub and grass family (BSG) was as follows: planting japonicus
above the channels left embankment berm within the slope, planting shrubs (small
cypress trees, golden privet, Buxus microphylla, Berberis etc.) forming shrub-mode
pattern, planting trees on the left lateral goods font row strip of the Tiding road
(Ligustrum, Sophora japonica, fast-growing willow etc.) as street trees, planting
Ligustrum in the right side of slope toe in the berm channels, planting japonicus and
shrub-mode pattern in the right side of the embankment (Cypress, Euonymus,
Pittosporum etc.), planting Sophora in the right side of the dike and the dike outstation
etc, planting Juju as a protective ecological fences inside of the right side of the land
（5）The ecological landscape restoration of the large-scale water transfer Canal
was proposed.We studied the ecological restoration technology of the 16 management
district node along the Jiping Canal due to the ecological restoration and green
landscaping demands and identified the concept of ecological restoration taking
dragon as thinking and taking bead as shape. Two ecological restoration models which
were Eco-park model and nursery stock base model were proposed based on site
conditions and functional analysis of the management area. At the same time, we
proposed the technologies of kinds of tree planting and road and square pavement of
management area, concrete pavement placement and irrigation system installation.
Keywords： Water Transfer Canal Project, ecological restoration, site types, high
and steep slope, ecologically protected slope by dry root net system, non-conveyance