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抽水蓄能电站岩质边坡消落带生态修复研究

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为解决抽水蓄能电站岩质边坡消落带生境重建和植物遴选难题,在河南天池抽水蓄能电站岩质边坡消落带建立1 001 m2 生态修复试验区,采用土工格栅+生态袋+挂网喷播复合技术构建植物生境.基于植物生长特性和水位波动节律,在试验区按照上、中、下三段梯级共配置13种耐淹植物物种,开展植物生长监测和水质监测.结果表明:①试验区乔木实生苗存活率达100%,灌木植物平均存活率为58.7%,植物长势优良排序为消落带上段>消落带中段>消落带下段;②试验区三个高程修复段草本植物平均盖度达81.7%,土工格栅+生态袋+挂网喷播复合工程技术在抽水蓄能电站岩质边坡生态修复中能有效保持水土,构筑植物生长生境;③试验区建成后水体总氮浓度消减了25.4%,消落带生态修复能有效消减水体面源污染,发挥生态效益.研究成果可为抽水蓄能电站岩质边坡消落带生态修复提供参考依据.
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

邢继宏、杨聚伟、赵杰、常世举

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河南天池抽水蓄能有限公司,河南南阳 47300

天池抽水蓄能电站 岩质边坡消落带 生态修复 植物遴选

2024

长江技术经济

长江技术经济

ISSN:
年,卷(期):2024.8(6)