寒区黑土侵蚀沟治理新技术研究.

Black soil erosion gullies pose a significant risk to the food security in the northeast of China, and the vast majority of them located in the cold environment. As a universal method of erosion gully control, the check dam faces the complex environmental threats of the freezing area. Confronting the issue of check dams in colder regions being unstable due to various factors like freezing, thawing, snowmelt and rainfall, a novel technology is introduced for managing black soil erosion gullies in cold regions, named ecological flexible gangue soil check dam. This check dam is composed of soil, soil filtering and anti-washout geosynthetics, gangue articulated blocks and plant protection, and offers benefits such as local materials, time efficiency, flexibility, stability, solid waste utilization, stone replacement, and advantageous cuttings,et al. This paper gives the design concept, the key parameters of the check dam and the crucial technologies for practical application, which constitutes a complete set of procedures. The results of field tests reveal that the deformation capacity of the ecological flexible gangue soil check dam is concentrated between -0.051 8 m and 0.030 7 m, within the acceptable range. Neither the channel before nor after the check dam widened, and the sediment deposition depth ranged between 17 cm and 67 cm. The soil erosion is significantly reduced. The vegetation coverage increased by 30% over the course of one year. This suggests the robust stability, governance effect, and substantial ecological advantages of the dam. The innovative ecological flexible gangue soil check dam surpasses the conventional check dam design by integrating eco-technology with organic engineering, offering fresh concepts and methods to manage erosion gully. [ABSTRACT FROM AUTHOR]