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以沪(上海)陕(陕西)高速公路信阳至南阳段填沙路基边坡为研究对象,运用径流场法建立了21个径流小区,对边坡的降雨特征因子与坡面土壤侵蚀关系进行了定量分析。结果表明:侵蚀性降雨量、侵蚀性平均雨强均与土壤侵蚀量存在较强的相关关系;降雨侵蚀力值与土壤侵蚀量存在很强的相关性;降雨量级与土壤侵蚀量有较强的相关性,降雨历时与土壤侵蚀量无明显的相关关系;侵蚀性降雨的前3、5、7 d降雨量与土壤侵蚀量的相关性均较差。该分析结果可为提高土壤侵蚀预测预报的准确性、有效预防和降低路基边坡土壤侵蚀提供科学依据。
Taking the Xinyang-Nanyang embankment embankment slope of Shanghai-Shaanxi (Shaanxi) Expressway as the research object, 21 runoff plots were established by using the runoff field method, and the relationship between rainfall feature factors of slope and slope soil erosion Quantitative analysis. The results show that both erosive rainfall and erosive mean rainfall intensity have a strong correlation with soil erosion; there is a strong correlation between rainfall erosivity and soil erosion; rainfall intensity and soil erosion There was no significant correlation between rainfall duration and soil erosion. The correlation between rainfall before 3, 5 and 7 days of rainfall and soil erosion was poor. The results of this analysis can provide a scientific basis for improving the accuracy of soil erosion prediction and forecasting and preventing and reducing the soil erosion of subgrade slope effectively.