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。本文以武广客运专线工程为例,通过水土流失影响指数评价模型来定量分析、评判该工程的水土流失影响程度。结果表明,该项目的水土流失影响指数值为0.21,仅为全国铁路建设项目水土流失影响平均水平的70%,这表明与传统铁路建设工程相比,武广客运专线建设工程的水土流失影响程度相对较低。其主要原因是工程单位长度占地面积(3.19 hm2/km)及影响面积(0.17 hm2/km)较小、工程单位长度总土石方量(7.00万m3/km)较少、工程单位长度水土流失总量(343.85 t/km)不大、水土流失治理面积比例较高(0.916)。
During the railways construction period, subgrade construction, tunnel excavation, etc. will induce soil and water loss, which has negative impact on eco - environment of the regions along the railway. In this study, the impact of soil and water loss for construction of the Wuhan - Guangzhou passenger dedicated railway was quantitatively analyzed and evaluated by using the SWII method. The result shows that the impact index value of soil erosion of this project was 0.21, which was 30% lower than the averaged value of impact indices of railways construction projects in China. The causes for the low index value included less occupation of land （3.19 hm^2/km） and influence area （0.17 hm^2/km） , little earthwork volume （7.00 × 10^4 m^3/km） , small amount of soil and water loss （343.85 t/km）, and high percentage of soil erosion control area （0. 916）.
出处
《亚热带水土保持》
2010年第4期18-21,共4页
Subtropical Soil and Water Conservation
关键词
武广客运专线
水土流失
SWII指数
Wuhan - Guangzhou passenger dedicated railway
soil erosion
impact index of soil erosion （SWII）
