【摘要】 铁路建设工程中的路基修筑、隧道开凿、取土弃渣均会导致大量的水土流失,对铁路沿线生态环境造成不利影响。以我国东南沿海地区5条双线铁路的新建工程为例,通过水土流失影响指数评价模型定量比较了5铁路建设工程的水土流失影响。结果表明,福厦线的单位占地面积、单位影响面积和单位工程造成的水土流失总量均最大;温福线的工期最长,其未恢复治理面积的比重也最高;龙厦线的单位土石方总量和单位弃方量最多。甬台温线、温福线、福厦线、厦深线和龙厦线的水土流失影响指数值分别为0.264、0.247、0.375、0.256和0.264,平均值为0.278。更多还原

【Abstract】 During the railways construction,such activities as subgrade building or tunnel excavating will induce soil and water loss, which has negative impact on eco-environment of the regions along the railway.The impact of soil and water loss for double-line-constructions of five railways in southeast coast of China was quantitatively analyzed and evaluated using the SWII method. The results showed that all the occupation land,impact area,and soil and water loss per kilometer for Fuzhou-Xiamen railway construction were the greatest in the five railways;the construction period of Wenzhou-Fuzhou railway was the longest and its proportion of uncontrolled area of soil and water loss per kilometer was the highest.The earthwork volume and wasted excavation per kilometer of Longyan-Xiamen railway were the greatest.The values for impact indices of soil erosion and water loss of Ningbo-Taizhou-Wenzhou railway,Wenzhou-Fuzhou railway,Fuzhou-Xiamen railway,Xiamen-Shenzhen railway and Longyan-Xiamen railway were 0.64,0.247, 0.375,0.265 and 0.64,respectively.The averaged value for these five railways was 0.278.更多还原