雨强和土地利用类型对豫西南山区产流产沙的影响

发布时间：2018-06-23 17:51

本文选题：人工降雨 + 雨强　；参考：《武汉大学学报(工学版)》2017年02期

【摘要】：为掌握雨强和土地利用方式对丹江口水库水源区水土流失的影响,采用室内人工模拟降雨试验,采集豫西南山区5种常见土地利用类型的表层土壤,研究其在6种雨强下的水土流失规律,结果表明:雨强对不同土地利用类型的产流产沙影响显著,5种土地利用类型土壤中的产流产沙量与雨强均呈幂函数增加,说明雨强越大,相应的产流产沙量也越多;6种雨强的平均产流量、产沙量均为坡耕地梯田荒草地乔木林灌草地,这是因为林地和灌草地土壤具有良好的保水保土效果,其产流产沙量都小于其他土地类型.结论:在豫西南山区有必要开展坡改梯和退耕还林还草工程,以减少用地中的水土流失,确保丹江口水库水质.
[Abstract]:In order to understand the influence of rainfall intensity and land use mode on soil and water loss in water source area of Danjiangkou Reservoir, the surface soil of five common land use types in southwest mountainous area of Henan Province was collected by artificial rainfall simulation experiment in laboratory. The results showed that the rainfall intensity had a significant effect on runoff and sediment yield of different land use types, and that the amount of runoff and sediment yield and rain intensity in 5 types of land use types were increased by power function, which indicated that the more rain intensity was, the greater the rainfall intensity was. The more runoff and sediment yield, the more the average runoff of 6 kinds of rain intensity, and the sediment yield is terraced field, barren grassland, Arbor forest, grassland, which is because the forestland and the shrub grassland soil have good water and soil conservation effect. The sediment yield is smaller than other land types. Conclusion: it is necessary to carry out slope transformation ladder and conversion of farmland to forest and grass in mountainous area of southwest Henan province in order to reduce soil erosion and ensure water quality of Danjiangkou Reservoir.
【作者单位】：黄河水文水资源科学研究院;河南省水文水资源局;河南省水土保持监督监测总站;河南农业大学林学院;
【分类号】：S157

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