论文部分内容阅读
运用人工降雨技术，对黄土低山丘陵区的湿润锋运动规律进行了综合研究。得到了各因素对湿润锋的正规方程解，可预测不同立地条件下的湿润锋，找出了影响湿润锋运动的主导因素，它们依次是降雨历时、降雨强度、土地利用方式与坡度的交互作用。通过分析揭示了各因素对湿润锋的影响程度，湿润锋的下行深度与降雨历时和降雨强度呈正相关，土地利用方式不同。湿润锋的下行深度也不一样，杨林土壤湿润锋的下行速率最快，其次是农田地和草地，最后是裸地和油松林土壤。为黄土低山丘陵区的综合治理提供根据。
By using artificial rainfall technique, the wetting front motion of loess hilly region was comprehensively studied. The solution to the normal equations of the wetting front is obtained for all factors. The wetting front can be predicted under different site conditions, and the dominant factors affecting the wetting front movement are found. These are the interaction of rainfall duration, rainfall intensity, land use and slope . Through the analysis, the impact of various factors on wetting front was revealed. The downward depth of wetting front was positively correlated with rainfall duration and rainfall intensity, and the land use patterns were different. Wetting front down the depth is not the same, Yang Lin wetting front down the fastest rate, followed by farmland and grassland, and finally the bare soil and Pinus tabulaeformis soil. It provides a basis for comprehensive management of loess hilly region.