Ecological Restoration in Water-Level Fluctuation Zone of Rock Slope in Pumped Storage Power Station
To address the difficulty of habitat reconstruction and plant screening in water-level fluctuation zone of rock slope in pumped storage power station,a 1 001 m2 ecological restoration experimental zone was established in Tianchi Pumped Storage Power Station in Henan Province.Plant habitat was constructed by using the composite technology integrating geogrid,ecological bags,and net-suspended spray seeding.According to plant growth characteristics and water-level fluctuation rhythms,we arranged 13 kinds of flood tolerant plants at upper,middle and lower elevation stages,and monitored the plants growth and water quality.Results show that:1)The survival rates of arbor seedlings and shrub seedlings were 100%and 58.7%,respectively.Plants grow better in the upper segment,then the middle segment and lower segment in descending order.2)The average coverage of herbaceous plants in the three elevation segments was 81.7%,demonstrating that the composite engineering technology effectively preserves soil and water,and builds plant growth habitat in the ecological restoration of rock slope in pumped storage power station.3)The content of total nitrogen reduced by 25.4%after the construction of the experimental zone,indicating that ecological restoration in water-level fluctuation zone could effectively reduce the non-point source water pollution and exert ecological benefits.The research findings provide reference basis for ecological restoration in water-level fluctuation zone of rock slope in pumped storage power station.
Tianchi pumped storage power stationwater-level fluctuation zone of rock slopeecological restorationplant screening