| 基于USLE模型的重庆仙鱼小流域土壤流失减少比例评价 |
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| 引用本文： | 郭宏忠,才业锦,陈琳,代数.基于USLE模型的重庆仙鱼小流域土壤流失减少比例评价[J].西南农业大学学报,2011,33(1). |
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| 作者姓名： | 郭宏忠 才业锦 陈琳 代数 |
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| 作者单位： | 重庆市水土保持生态环境监测总站;西南大学资源环境学院; |
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| 基金项目： | 重庆市水利局项目“重庆水土保持世界银行贷款项目水土保持监测评价”;重庆市水利局项目“重庆市土壤侵蚀模数”的部分研究成果 |
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| 摘 要： | 以仙鱼小流域为例,通过对各项措施图斑的平均坡度、坡长、保土措施、植被覆盖度、土地利用方式等调查,采用USLE方程的各参数因子,计算土壤流失减少比例.仙鱼小流域通过治理后,水土流失减少比例为28.19%,水土流失防治达到目标要求;通过对不同措施图斑水土流失减少比例分析,水土流失减少比例随着坡度或坡长的增加而增加,以25°坡度、70 m坡长作为变化的分界点,当坡度在25°以下或坡长小于70 m时土壤流失减少比例变化趋势较缓,当坡度在25°以上或坡长大于70 m时土壤流失减少比例增长趋势较快;各项水土保持措施中,以石坎坡改梯防治水土流失的效果最好,坡面水系工程措施可有效提高坡耕地抵御季节性干旱的能力.该研究结果可为今后开展小流域综合治理提供实践经验.
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| 关 键 词： | 土壤流失减少比例 评价 小流域 USLE模型 植被覆盖度 |
Evaluation on Soil Loss Reduced Ratio Based on USLE Model in Xianyu Small Watershed in Chongqing |
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| GUO Hong-zhong,CAI Ye-jin,CHEN Lin,DAI Shu.Chongqing General Monitoring Station of Soil , Water Conservation,Chongqing ,China,.School of Natural Resources , Environment,Southwest University,Chongqing.Evaluation on Soil Loss Reduced Ratio Based on USLE Model in Xianyu Small Watershed in Chongqing[J].Journal of Southwest Agricultural University,2011,33(1). |
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| Authors: | GUO Hong-zhong CAI Ye-jin CHEN Lin DAI ShuChongqing General Monitoring Station of Soil Water Conservation Chongqing China School of Natural Resources Environment Southwest University Chongqing |
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| Institution: | GUO Hong-zhong1,CAI Ye-jin2,CHEN Lin1,DAI Shu21.Chongqing General Monitoring Station of Soil and Water Conservation,Chongqing 401147,China,2.School of Natural Resources And Environment,Southwest University,Chongqing 400716 |
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| Abstract: | Soil loss reduce ratio(SLRR) is an important indicator in the evaluation of various measures to reduce soil erosion in small watersheds.Taking the Xianyu small watershed in Chongqing city for example and using various parameters of the USLE(universal soil loss equation) model,this paper calculates the proportion of soil erosion reduction through various measures(average slope,slope length,soil conservation measures,vegetation coverage and land-use).The treatment of this small watershed proved to have attain... |
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| Keywords: | soil loss reduced ratio assessment small watershed USLE model vegetation coverage |
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