黑土地土壤风蚀特征参数及风蚀物分布规律研究

The Study on Characteristic Parameters of Wind Erosion and the Distribution of Products Related to Wind Erosion in Black Soil Area

通过对黑土区风季风速和表土含水量的监测、旱作耕地风蚀物野外采集试验、室内风蚀物粒度分析试验,对东北黑土区土壤风蚀特征参数以及风蚀物的垂直分布规律进行定量研究,初步得出黑土区裸露耕地下垫面粗糙度、摩阻风速、起沙风速等风蚀过程的重要特征参数,得出黑土地土壤风蚀风沙流断面风蚀物含量、风蚀物颗粒尺度的垂向规律,为该区土壤风蚀、土地沙化的进一步研究与防治提供基础依据。

By analyzing the wind speed during the typhoon season , the monitor of water content in upper soil , the collection of products re- lated to wind erosion in dry farmland and the analysis of granularity on products above in the laboratory, a quantitative research on the charac- teristic parameters of wind erosion and the vertical distribution of products related to wind erosion in black soil area was carried on. The study showed that the roughness of underlying surface in bare arable land of the black soil area , the friction velocity , the sand raising speed and other important characteristic parameters were obtained, and the conclusion about the content of products related to wind erosion in the sand flow cross-section of the black soil, the vertical distribution of panicle size on products related to wind erosion were drawn. The study provided basic foundation for the wind erosion of black soil and further research and prevention about the land desertification.