平原风沙区工程建设的新增土壤流失量预测

新增土壤流失量预测是编制水土保持方案的前提.利用中国科学院兰州沙漠所的研究成果,对平原风沙区某高速公路建设所造成的新增风力侵蚀量进行预测,结果表明,工程建设期及运行2年的过程中有可能造成的风蚀总量为1 430万kg,新增890万kg,主要来自主体工程和取土场,其风蚀量占风蚀总量的比例分别达到48.4%和48.2%,说明这两部分即是布置水土保持措施的重点所在.

Forecasting new soil loss in the plain wind-sandy area due to the engineering construction

The forecast of new soil loss is precondition for formulating the scheme of soil and water conservation. Based on the research findings from the Lanzhou Institute of Deserts of the Chinese academy of sciences, this paper gives the forecast of new soil loss caused by the expressway construction in the plain wind-sandy area. The forecast results showed that it would he likely to result in 14300 ton soil loss in total caused by wind erosion during the construction period and 2-year operation period and new-added soil lossamount is 8900 ton, which mainly come from main body construction (including of road surface and roadbed slope) and borrow pit, the amounts of wind erosion accounts for 48.4% and 48.2% of the total amount respectively, which makes out that these two aspects are key to arrange the scheme of soil and water conservation.