ZHANG Zheng, CHEN Ji-hu, JIANG De-wen, et al. Application of Soil and Water Loss Impact Index for Expressway Projects[J]. Bulletin of Soiland Water Conservation, 2014, 33(2): 116-119.
ZHANG Zheng, CHEN Ji-hu, JIANG De-wen, et al. Application of Soil and Water Loss Impact Index for Expressway Projects[J]. Bulletin of Soiland Water Conservation, 2014, 33(2): 116-119. DOI: 10.13961/j.cnki.stbctb.2014.02.025.
The quantitative calculation and evaluation for soil and water conservation schemes of 106 expressways are made using soil and water loss impact index(SWII). The weight of each indicator is calculated by consulting experts about the weights of 9 indicators and applying analytic hierarchy process(AHP). The key factors for soil and water loss in different eroded areas are then analyzed by applying principal components analysis(PCA). According to the calculated SWII
the expressway projects can be divided into three types: high-influencing project with a value of SWII higher than 0.387
medium-influencing project with a value of SWII between 0.258 and 0.387
and low-influencing project with a value of SWII lower than 0.258. Based on the influencing degree of soil and water loss on expressway projects
some technical requirements are presented from the aspects of prevention criteria
engineering grades
allocating requirements of soil and water conservation measures and construction techniques.