高速公路弃土场的水土流失监测及其生态治理  

Soil and Water Loss Mornitoring and Its Ecological Control on Spoil Ground in Expressway Construction

作　　者：卓慕宁[1] 李定强[1] 郑煜基[1] 

机构地区：[1]广东省生态环境与土壤研究所

出　　处：《水土保持通报》2007年第4期96-99,共4页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金重点项目(40331009);广东省科技重大专项(2006A36801001);广东省科技计划项目(2005B33302006;2004B60204003;2002C32202)

摘　　要：高速公路弃土场边坡的生态治理是公路建设环境保护的重要内容。在京珠高速公路粤境南段弃土场开展水土流失监测研究,探讨了弃土场的水土流失及其生态治理的水土保持效果。结果表明,弃土场水土流失剧烈,侵蚀模数平均为3.24×104t/(km2.a),边坡沟蚀现象明显。采用香根草(Vetiveria zizaniodes)生态护坡技术治理弃土场边坡水土流失,水土保持效果显著,坡面土壤流失量比对照小区减少92.24%,边坡稳定,在一定程度上可代替浆砌片石骨架植草护坡措施。因此,高速公路弃土场的水土流失生态治理可大力推广应用香根草生态护坡技术。Ecological control to the slope of spoil ground is the key project of environmental protection in expressway construction. The monitoring experiment for soil and water loss in the spoil ground of Beijing-Zhuhai expressway＇s south section within the boundary of Guangdong Province was conducted to study the soil and water loss, ecological control and application effects of the slopes of spoil ground. Results showed that soil and water loss was serious, and soil erosion modulus was about 32 360 t/（km^2·a） on spoil ground. Moreover, distinct gully erosion was observed on the slope. Soil and water conservation effects from using Vetiveria zizaniodes to protect the slope were significant. Soil loss from the slope where Vetiveria zizaniodes grows decreased by 92.24 %, and the slope was stable compared with the control plots. To a certain extent, using Vetiveria zizaniodes to protect slope can replace the slope protection measure of planting grass in mortar-rubble skeleton. Therefore, it is feasible to popularize Vetiveria zizaniodes cultivation to protect the slope of spoil ground along the expressway.

关 键 词：高速公路 弃土场 水土流失 生态治理 香根草 

分 类 号：X157[环境科学与工程—环境科学] X171.4