ZHANG Yuhua,ZHOU Beibei,CHEN Xiaopeng,et al.Effect of Nano Carbon on Soil Moisture Movement Characteristics in the Loess Slope Based on Hydrus Simulation[J].Research of Soil and Water Conservation,2020,27(01):132-138.
基于Hydrus模拟纳米碳对黄土坡面土壤水分运动特征的影响
- Title:
- Effect of Nano Carbon on Soil Moisture Movement Characteristics in the Loess Slope Based on Hydrus Simulation
- 文章编号:
- 1005-3409(2020)01-0132-07
- 分类号:
- S152.72
- 文献标志码:
- A
- 摘要:
- 黄土高原水土流失严重,纳米碳可对黄土坡面水土流失起到较好调控作用。基于Hydrus模型,结合野外坡地模拟降雨试验数据,分析了纳米碳对黄土地区坡地降雨侵蚀的影响过程,并通过模型确定相关参数,为治理黄土地区水土流失及评价模型适用性提供依据。结果表明:纳米碳可提高降雨在坡地土壤的水分入渗量,增加土壤对降雨的容纳能力,且纳米碳施加量越大,土壤增渗效果越好,其中施量为1.0%时,裸地、柠条、苜蓿、黄豆、玉米累积入渗量分别增加17%,5%,12%,6%,7%; Hydrus软件的模拟结果可有效反映纳米碳对坡面降雨入渗的影响过程,通过对相关系数R2,平均绝对值误差MAE和均方根误差RMSE分析,Hydrus拟合结果可信度较高。通过对土壤拟合水力参数的对比分析,纳米碳对土壤水分入渗过程具有较大影响,随纳米碳施加量的增加,各水力参数的变化与纳米碳施加量存在明显的线性关系,进气吸力hd(斜率为41～146)、形状系数n(斜率为0.381～2.573)、饱和导水率Ks(斜率为0.023～0.064)均呈增大趋势。
- Abstract:
- Soil and water loss in the Loess Plateau is serious, and nano carbon can play a good role in regulating water and soil loss on the loess slope. Therefore, this paper analyzed the influence of nano carbon on rainfall erosion on sloping land in loess area by combining the simulated rainfall and the Hydrus model on the field. The relevant parameters are determined by the model to provide a basis for controlling soil and water loss in the loess area and applicability of the evaluation model. The specific results are as follows. Nano carbon can increase the rainfall infiltration on slope soil, increase the soil capacity to accommodate rainfall, and the greater the amount of nano-carbon is applied, the better soil infiltration increases. while the application rate is 1.0%, the cumulative infiltration of bare land, caragana, medlar, soybean, and corn increased by 17%, 5%, 12%, 6%, and 7%, respectively. The simulation results of Hydrus can effectively reflect the effect of nano carbon on the rainfall infiltration on the slope. the Hydrus fitting results are highly reliable through the analysis of the influence of the correlation coefficient R2, the average absolute value error MAE and the root mean square error RMSE. Nano carbon has a great influence on the process of soil water infiltration according to comparing and analyzing the hydraulic parameters of soil fitting. The change of hydraulic parameters has a significant linear relationship with the amount of nano carbon, the suction hd (slope is 41～146), the shape factor n(slope is 0.381～2.573), and the saturated hydraulic conductivity Ks(slope is 0.023～0.064)show the increasing trend with the increase of nano carbon application rate.
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备注/Memo
收稿日期:2019-01-29 修回日期:2019-03-23
资助项目:国家自然科学基金(51239009;41371239);陕西省科技支撑项目(2013KJXX-38);陕西省自然科学基金(2015JQ5161);西安理工大学特色研究计划项目(2016TS013)
第一作者:张育华(1996—),女,陕西西安人,硕士研究生,主要从事农业水土与生态环境研究。E-mail:854767844@qq.com
通信作者:周蓓蓓(1982—),女,江苏徐州人,博士,教授,主要从事农业水土与生态环境研究。E-mail:happyangle222@gmail.com