| 1. | The mechanisms and models of volatile contaminants transporting in soils
挥发性有机污染物在土壤中的运移机制与模型 |
| 2. | This paper reviews the research result o . modeling solute transport in soil and discusses the advantage and disadvantage of these models
本文回顾了关于土壤中溶质运移模型的研究成果，讨论了各个模型的优势及其不足之处，介绍了应用最为广泛的传统微分方程模型。 |
| 3. | Soil moisture curve is elementary curve that shows the relation between potential energy and the content of water soil and analyses retaining and transporting in soil water belt
摘要土壤水分特征曲线是表征土壤中水的含量与势能之间的关系，是研究包气带土壤水分的保持和运移所用到的基本特性曲线。 |
| 4. | The tdr measurements of ecw with high spatial and temporal resolution combine with porous ceramic cup solution samplers to follow no3 - n transport in soil is a new , valuable method for analyzing transport of nonconservative ions in soil
土壤中人孔隙的存在可使硝态氮在灌水后的很短时间内随水分以优势流的方式到达下层土壤。 |
| 5. | The adsorption and desorption behaviors of a herbicide on soil is one of the important factors governing bio - availability and persistency of the herbicide , and play an important part in predicting its transport in soil and aquifer
摘要除草剂在土壤上的吸附和解吸行为是支配该除草剂的环境中的生物有效性和持久性的重要因素之一，同时对于预测除草剂在土壤和潜层水中的运动也是有重要作用。 |
| 6. | In field study , the expenment on nitrogen transport and transformation in soils with different irrigation ( with both ground water and sewage effluent ) and fertilization levels has been conducted . with considenng the n - uptake , nitrification and demtrification processes , a model for describing no2 - - n transport and transformation in unsaturated soil has been applied . results show that , the n03 + - n accumulating in soil is contributed more by fertilization but lees by irrigation with sewage effluent , and the model can be used to simulate no3 - - n transport in soils
在室外进行了不同清污水灌水量与施肥条件下氮素迁移转化试验，同时进行了考虑根系吸收，硝化和反硝化的田间非饱和no _ 3 ~ - ? n迁移转化模型的数值模拟，研究结果表明与施肥相比，污水灌溉对土壤中no _ 3 ~ - ? n累积的贡献较小，所建立模型可用于模拟no _ 3 ~ - ? n在土壤中的迁移。 |
| 7. | We use time domain reflectometry ( tdr ) to simultaneously estimate volumetric soil water content , soil solution electrical conductivity , and soil nitrate concentrations in combination with porous ceramic cup solution samplers to follow no3 - n transport in soil exposed to different irrigation , fertilizer quota and temperature . the experiment was conducted with nondestructive soil colums
本研究中以原状土为研究对象，利用时域反射技术随时测定土壤含水量和电导率的特点结合多孔陶瓷杯抽滤技术，研究在不同灌水、施肥和温度下硝态氮的变化。 |
| 8. | The breakthrough curves of cadmium through the soils were simulated by the convection - dispersion equation according to the local equilibrium assumption , and cadmium transport in soils was fitted by the nonequilibrium models ( including the two - site kinetic sorption model and the two - region model ) . then , the factor of affecting cadmium transport was analyzed
用非平衡模型即两点动力学吸附模型和两区模型拟合和模拟了镉在土壤中的穿透曲线，获得了物理和化学非平衡模型的参数，初步分析了土壤中影响镉运移的有关因素。 |
