植物篱措施对紫色土坡耕地产流产沙及微地形的影响
发布时间：2019-04-13 07:37
【摘要】：基于遂宁水土保持试验站坡耕地2012—2016年次降雨和径流输沙数据,定量分析了自然降雨下植物篱对坡耕地产流产沙及微地形的影响。结果表明:植物篱小区总径流深是对照小区的80%~84%,总冲刷量是对照小区的34%~44%,植物篱减沙作用优于减流。对照小区(Ⅱ小区和Ⅴ小区)径流深、冲刷量与平均雨强、降雨量均极显著相关(P0.01);植物篱小区(Ⅰ小区、Ⅲ小区和Ⅳ小区)径流深、冲刷量与平均雨强、降雨量均呈正相关,其中径流深与降雨量极显著相关。各雨型间产流产沙差异不显著,其中植物篱对A型雨(大雨强、短历时)减流减沙效果优于B型雨(中雨强、中历时)和C型雨(小雨强、长历时)。定植植物篱后,篱带前出现泥沙淤积带,15°香根草(Ⅰ小区)、10°香根草(Ⅲ小区)和10°新银合欢(Ⅳ小区)平均坡度分别演变为11.97°,7.73°和7.89°,香根草植物篱的效果较明显,植物篱使得坡耕地梯田化发展。
[Abstract]:Based on the rainfall and runoff sediment transport data of slope cultivated land in Suining soil and Water Conservation Test Station from 2012 to 2016, the effects of hedgerow on runoff sediment yield and microtopography of sloping farmland under natural rainfall were quantitatively analyzed. The results showed that the total runoff depth of hedgerow plot was 80% ~ 84% of that of the control plot, and the total scour amount was 34% ~ 44% of that of the control plot, and the sediment reduction effect of hedgerow was better than that of the control plot. The runoff depth and scouring amount were significantly correlated with the average rain intensity and rainfall in the control plot (鈪，
本文编号：2457368
[Abstract]:Based on the rainfall and runoff sediment transport data of slope cultivated land in Suining soil and Water Conservation Test Station from 2012 to 2016, the effects of hedgerow on runoff sediment yield and microtopography of sloping farmland under natural rainfall were quantitatively analyzed. The results showed that the total runoff depth of hedgerow plot was 80% ~ 84% of that of the control plot, and the total scour amount was 34% ~ 44% of that of the control plot, and the sediment reduction effect of hedgerow was better than that of the control plot. The runoff depth and scouring amount were significantly correlated with the average rain intensity and rainfall in the control plot (鈪，
本文编号：2457368
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