研究论文
吕贤弼,刘兆昌,王君连,聂永丰,王占生,白庆中.天然和人工叠加流场下弥散试验研究[J].环境科学学报,1990,10(1):27-35
天然和人工叠加流场下弥散试验研究
- FIELD EXPERIMENTATION FOR DISPERSION WITH SUPERPOSITION OF THE NATURAL AND ARTIFICIAL VELOCITY FIELDS
- 基金项目：
- 作者
- 单位
- 吕贤弼
- 清华大学环境工程研究所, 北京
- 刘兆昌
- 清华大学环境工程研究所, 北京
- 王君连
- 清华大学环境工程研究所, 北京
- 聂永丰
- 清华大学环境工程研究所, 北京
- 王占生
- 清华大学环境工程研究所, 北京
- 白庆中
- 清华大学环境工程研究所, 北京
- 摘要：在污灌区浅层含水层进行了现场弥散试验,采用氚做为示踪剂,瞬时投放.因为天然流速较弱,通过注水形成天然的和人工的叠加流场.根据流场特性。建立以Φ-Ψ坐标表示的移流弥散数学模型.采用有限差数值方法求解,其中二维模型应用分裂格式.通过计算的浓度曲线与实验曲线拟合,求得纵、横向弥散率.
- Abstract：After adding instantaneously 3H tracer to an injection well,the dispersion coefficients in the upper stratum of aquifer of a wastewater irrigated area were determined on field. Water was continuously injected into the aquifer to form a natural-artificial superposition velocity field during the experiment. A mathematical convection-dispersion model was established with the Φ-ψcoordinate system considering the character of the velocity field. The finite difference approximation,the splitting scheme for 2-dimensional model,was used.The numerical curves of concentration were adjusted to obtain the longitudinal and lateral dispersivity.
- Key words：ground water pollution dispersion dispersivity.
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