海南高速公路水土保持损益分析

Analysis on Benefit and Loss of Soil and Water Conservation for Expressways in Hainan

以海南3条高速公路为例,通过水土流失影响指数,对3条公路的水土流失影响进行了定量分析。结果表明,3条高速公路的SWII值表现为0.227(文琼)<0.289(中线)<0.310(横线),横线、中线的SWII值大于平均值(0.274 3),文琼小于平均值。考虑到地形因子对SWII的影响,建议在SWII统计中增加地形因子修正系数。

Taking three expressways in Hainan Province as an example, the quantitative analysis of the effects of soil and water loss influencing index on soil erosion and water loss of three expressway was conducted. The S WII value was 0.227 （Wenqiong） 〈 0. 289 （Zhongxian） 〈 0.310 （Hengxian）. Considering the effects of terrain factors on SWII, it was suggested increasing the terrain factor correction coefflciem in the SWII statistics.