不同自然降雨雨型下紅壤坡地地表徑流和壤中流輸出特征
[Abstract]:The red soil hilly area in southern China is affected by rainfall and soil properties, and the flood disaster coexists with the seasonal drought. It is of great significance to study the runoff output characteristics in the rainfall process of sloping land. Based on the large-scale soil leakage device in the soil and water conservation ecological science and technology garden of Jiangxi Province, the runoff output characteristics of three different treatments of red soil slope land, including grass mulching, hay mulching and bare exposure, were studied under 32 natural rainfall events during the three-year period. The results showed that there was no surface runoff in the red soil slope of the study area under light rain, and under moderate rain, the proportion of surface runoff, 80% and 12% of the total runoff was 58%, 80% and 12%, respectively, which were covered by grass and hay under moderate rain type, and that the total amount of surface runoff was 58%, 80% and 12% respectively. For promoting rainfall infiltration, hay mulching is the best. Under heavy rain and above, soil middle flow was the main treatment of grass mulching and hay mulching, accounting for 63% and 64%, respectively, and surface runoff was dominant in bare treatment, accounting for 93%. In addition to planting plants to strengthen vegetation cover in the development of red soil sloping land, the application of mulching measures can play a better role in water conservation and soil moisture conservation.
【作者單位】: 江西省水土保持科學(xué)研究院;江西省土壤侵蝕與防治重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金項(xiàng)目(41461060,41501300) 水利部公益性項(xiàng)目(201401051) 江西省水利科技項(xiàng)目(KT201310,KT201521)
【分類號(hào)】:S157
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