Identification And Evaluation Of Ecological Management Technology On Highway Slope In Typical Ecological Fragile Area

In recent years,a large number of ecological management technology was performed on highway slope in the process of highway construction in China.The quality of these technologies varied widely,however,previous studies focused too much on the ecological benefits brought by these technologies,disregarding the costs and the maturity of them,thus making some technologies uneasily to achieve their desired effect,which will cause a lot of waste to restrict the highway construction and economic development.Supported by the National Key Research and Development Program "The methodology and indicator system for assessing ecological restoration technologies and evaluation of global ecosystem rehabilitation technologies",our study considered not only ecological benefits brought by the technology but also the costs and the maturity of the technology in the view of the development stage of highway construction in our country.For these three aspects,we establish an evaluation index system for ecological management technology on highway slope and use AHP to determine the index weight.Based on the evaluation index system,we summarize the whole ecological management technology applied to highway slope in China through the collection of literature,books,soil and water conservation program and preliminary design of highway construction project and acceptance report combined with market research,and then sort them out in four typical ecological fragile areas such as Northern sandy region,Loess plateau region,Tibet plateau region and Southwest Karst mountain region.The index parameters of each technologies were extracted according to the evaluation index and the corresponding quantitative methods.Finally we evaluate each ecological management technology on highway slope in different fragile area.The main contents and conclusions are as follows:1IThe comprehensive score of the ecological malagement technology of highway slope in the northern sandy region is ranked in the order of "Thick layer base material spraying technology"(7.24 points)>"Framework grass technology"(5.47 points)>"Firewood sand barrier"(4.98 points).Single index scoring results show that "Thick layer base material spraying technology" has higher technology maturity,"Framework grass technology" has higher ecological benefits,"Firewood sand barrier" has lower technology cost.2.The comprehensive score of the ecological management technology in the Loess plateau region is ranked in the order of "Soil spray-sowing technology"(6.72 points)>"3D vegetation net technology"(6.53 points)>"Framework grass technology"(5.52 points).Single index scoring results show that "Framework grass technology" has higher technology maturity,"Soil spray-sowing technology,has higher ecological benefits,"3D vegetation net technology" has lower technology cost.3.The comprehensive score of the ecological management technology in the Tibet plateau region is ranked in the order of "Soil spray-sowing technology"(5.42 points)>“3D vegetation net technology"(4.84 points)>"Framework grass technology"(4.61 points).Single index scoring results show that "Framework grass technology" has higher technology maturity,"Soil spray?sowing technology" has higher ecological benefits,"3D vegetation net technology" has lower technology cost.4.The comprehensive score of the ecological management technology in the Southwest Karst mountain region is ranked in the order of "Thick layer base material spraying technology"(7.3 5 points)>"KST shrub technology"(7.15 points)>"Vetiver grass technology"(7.09 points)>"Vegetation-growing concrete technology"(6.27 points)>"Framework grass technology"(4.26 points).Single index scoring results show that "Vegetation-growing concrete technology" and "Framework grass technology" have higher technology maturity,"Thick layer base material spraying technology"has higher ecological benefits,"Vetiver grass technology" has lower technology cost.