黄河三角洲湿地土壤毛管水运动特性研究
发布时间：2018-08-01 15:45
【摘要】：以黄河三角洲湿地土壤为研究对象,采用土柱实验方法,设置1.3、1.4、1.5g·cm~(-3)共3个容重处理,实验时长120min,定时测定湿地盐碱土毛管水运动过程及积水入渗过程各指标,并通过Philip模型和Kostiakov模型拟合其动态规律性,以此了解黄河三角洲湿地土壤毛管水过程与运动特性。结果表明,不同容重条件下,湿地盐碱土毛管吸水过程各指标动态变化规律与非盐碱土一致;同等条件下,积水入渗过程各指标值均大于毛管吸水过程,各容重土壤积水入渗的初始入渗率和稳定入渗率分别在0.87~1.93cm·min-1和0.028~0.051cm·min-1,毛管吸水过程的相应指标值分别在0.32~0.43cm·min-1和0.025~0.034cm·min-1,入渗60min时,各容重积水入渗湿润锋距离和累积入渗量分别达到13.58~17.62cm和4.95~6.99cm,是同时刻毛管吸水的1.19~1.22倍和1.13~1.29倍。在实验观测的120min内,3种容重土壤毛管水上升高度与入渗湿润锋、累积毛管吸水量与累积入渗量间均存在显著的正相关关系(P0.05)。利用Philip模型、Kostiakov模型对土壤毛管吸水过程和积水入渗过程进行模拟,两种模型对3种容重土壤均具有良好的适应性,但Philip模型对毛管吸水过程的模拟效果最佳,其R2值均大于0.9639,Kostiakov模型则更适于积水入渗过程的模拟,其R2值大于0.8819。
[Abstract]:Taking the wetland soil in the Yellow River Delta as the research object, the soil column experiment method was used to set up 1.3,1.4,1.5g cm~ (-3) with 3 bulk density treatments. The experiment time was long 120min, and the indexes of the water movement process and the infiltration process of the wetland saline alkali soil were determined regularly, and the dynamic regularity was fitted through the Philip model and the Kostiakov model to understand the dynamic regularity of the water. The results show that under the conditions of different bulk density, the dynamic changes of the indexes of water absorption of wetland saline alkali soil are the same as that of non saline soil. Under the same conditions, the index values of the water infiltration process are greater than that of the capillary water absorption process, and the initial infiltration rate and stability of the accumulated water infiltration in each bulk soil are stable. When the infiltration rate is 0.87~1.93cm. Min-1 and 0.028~0.051cm min-1 respectively, the corresponding indexes of water absorption in the capillary are 0.32~0.43cm. Min-1 and 0.025~0.034cm min-1 respectively. When the infiltration 60min, the wetting front distance and the cumulative infiltration amount of each bulk density water infiltration are respectively reached 13.58~17.62cm and 4.95~ 6.99cm, which is at the same time and 1 of the water absorption of the capillary tubes. .13~1.29 times. In the 120min of the experimental observation, there is a significant positive correlation between the rising height of 3 kinds of bulk soil capillary water and the infiltration of Shi Runfeng, the accumulated capillary water absorption and the cumulative infiltration (P0.05). Using the Philip model, the Kostiakov model simulates the water absorption and water infiltration process of the soil capillary, and the two models have 3 kinds of bulk density. The soil has good adaptability, but the Philip model has the best simulation effect on the water absorption process. The R2 value of the model is more than 0.9639. The Kostiakov model is more suitable for the simulation of the water infiltration process, and its R2 value is greater than 0.8819..
【作者单位】： 鲁东大学资源与环境工程学院;
【基金】：国家水体污染控制与治理科技重大专项(2015ZX07203-007) 山东省高等学校优势学科人才团队培育计划“蓝黄两区滨海资源与环境团队”项目 山东省自然科学基金项目(ZR2013DM010)
【分类号】：S152.7
本文编号：2158053
[Abstract]:Taking the wetland soil in the Yellow River Delta as the research object, the soil column experiment method was used to set up 1.3,1.4,1.5g cm~ (-3) with 3 bulk density treatments. The experiment time was long 120min, and the indexes of the water movement process and the infiltration process of the wetland saline alkali soil were determined regularly, and the dynamic regularity was fitted through the Philip model and the Kostiakov model to understand the dynamic regularity of the water. The results show that under the conditions of different bulk density, the dynamic changes of the indexes of water absorption of wetland saline alkali soil are the same as that of non saline soil. Under the same conditions, the index values of the water infiltration process are greater than that of the capillary water absorption process, and the initial infiltration rate and stability of the accumulated water infiltration in each bulk soil are stable. When the infiltration rate is 0.87~1.93cm. Min-1 and 0.028~0.051cm min-1 respectively, the corresponding indexes of water absorption in the capillary are 0.32~0.43cm. Min-1 and 0.025~0.034cm min-1 respectively. When the infiltration 60min, the wetting front distance and the cumulative infiltration amount of each bulk density water infiltration are respectively reached 13.58~17.62cm and 4.95~ 6.99cm, which is at the same time and 1 of the water absorption of the capillary tubes. .13~1.29 times. In the 120min of the experimental observation, there is a significant positive correlation between the rising height of 3 kinds of bulk soil capillary water and the infiltration of Shi Runfeng, the accumulated capillary water absorption and the cumulative infiltration (P0.05). Using the Philip model, the Kostiakov model simulates the water absorption and water infiltration process of the soil capillary, and the two models have 3 kinds of bulk density. The soil has good adaptability, but the Philip model has the best simulation effect on the water absorption process. The R2 value of the model is more than 0.9639. The Kostiakov model is more suitable for the simulation of the water infiltration process, and its R2 value is greater than 0.8819..
【作者单位】： 鲁东大学资源与环境工程学院;
【基金】：国家水体污染控制与治理科技重大专项(2015ZX07203-007) 山东省高等学校优势学科人才团队培育计划“蓝黄两区滨海资源与环境团队”项目 山东省自然科学基金项目(ZR2013DM010)
【分类号】：S152.7
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