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Alternative TitleEffects of Agave americana on Soil and Water Conservation of Slope in Dry-Hot Valley of Jinsha River
何周窈1,2; 熊东红1
Source Publication山地学报
Contribution Rank1
Abstract为查明剑麻的水土保持效应,以金沙江干热河谷作为研究区域,通过径流小区定位观测法,分别观测了10°和20°坡面上种植剑麻的产流产沙特征。结果表明:(1)元谋县20142016年,年均降雨量为659.46 mm,年均降雨天数为82天。(2)三年间10°剑麻地和裸地平均径流深分别为101.91 7.56 mm和236.70 9.06 mm,剑麻地比裸地减少56.95%; 20°剑麻地和裸地平均径流深分别为152.78 8.12 mm和252.20 10.47 mm,剑麻地比裸地减少39.42%。(3) 20142016年, 10°剑麻地平均径流系数仅为0.23 0.17,裸地为0.50 0.17,剑麻地比裸地减少了54.00%; 20°的剑麻地与裸地平均径流系数分别为0.36 0.16和0.53 0.17,两者相比减少32.08%。综上所述,剑麻不仅拥有明显的拦沙作用,其截流效应也十分显著,在金沙江干热河谷区表现出良好的水土保持效应。(4)观测期间10°坡面上剑麻地和裸地的平均土壤侵蚀模数分别为355.27 31.86 t /(km~2. a)和1788.68 153.11 t /(km~2. a),剑麻地相比裸地减少80.14%; 20°坡面上剑麻地平均土壤侵蚀模数为2023.29 189.22 t /(km~2. a),裸地为4506.14 362.70 t /(km~2. a),两者相比减少55.10%。
Other AbstractIn this study,effects of Agave americana on soil and water conservation of slope were studied by the runoff plot positioning observation method using 10° and 20° runoff plot in the dry-hot valley of Jinsha River. The result showed that the annual rainfall was 659.46 mm and the rainfall days were 82 d in Yuanmou. The annual soil erosion modulus in the 10° bare land was estimated at 1788.68 153.11 t /( km~2. a) during 2014 to 2016 and the same slope of Agave americana land was 355.27 31.86 t /( km~2. a). Compared to the bare land,there was a decrease of 80.14% in the Agave americana land. For the slope of 20°,the annual soil erosion modulus in the bare land was 4506.14 362.70 t /( km~2. a),while that of the Agave americana land was 2023.29 189.22 t /( km~2. a). Planting Agave americana reduced the amount of sediment by 55.10%. The average runoff depth of different slopes was also significantly different in three years. On the slope of 10°,bare land was 236.70 9.06 mm and Agave americana land was 101.91 7.56 mm. The average runoff depth in the 10° Agave americana land was 56.95% less than that of bare land. The average runoff depth in the 20° bare land and Agave americana land were estimated at 252.20 10.47mm and 152.78 8.12 mm,respectively. The average runoff depth in the 20° Agave americana land was 39.42% less than that of bare land. During the monitoring time,the average runoff coefficient of bare land with a slope of 10° was 0.50 0.17 and same slope of Agave americana land was 0.23 0.17,indicating that the average runoff coefficient of 10° Agave americana land was 54.00% less than that of bare land. For 20° slope,the average runoff coefficients were estimated at 0.53 0.17 and 0.36 0.16 in the bare land and the Agave americana land,respectively,which demonstrated that the average runoff coefficient of 20° Agave americana land was 32.08% lower than bare land. These results indicated that the Agave americana exhibited a preferable effect on the soil and water conservation in the dry-hot valley of Jinsha River.
Keyword干热河谷 剑麻 产流产沙 径流系数 水土保持效应
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Document Type期刊论文
Affiliation1.中国科学院、水利部成都山地灾害与环境研究所& 中国科学院山地灾害与地表过程重点实验室,成都610041;
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
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何周窈,熊东红. 金沙江干热河谷区坡面剑麻的水土保持效应[J]. 山地学报,2018,36(5):731-739.
APA 何周窈,&熊东红.(2018).金沙江干热河谷区坡面剑麻的水土保持效应.山地学报,36(5),731-739.
MLA 何周窈,et al."金沙江干热河谷区坡面剑麻的水土保持效应".山地学报 36.5(2018):731-739.
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