• 关键词：水环境预测  瞬时点源  污染带特征  最大超标面积

• 基金项目：福建省自然科学基金

• 张江山
• 福建师范大学环境科学研究所, 福州 350007

• 摘要：探讨瞬时点源污染带几何特征，给出污染带中心位置，长度、宽度及面积等计算公式。并证明了当Cm=C0e时超标污染带面积达最大值Sm=MhC0e, 表明此值仅与污染物投放量M、扩散水深h和预先给定的浓度C0有关。

• Abstract：The geometric feature of instantaneous point source pollutant zone is discussed. The equations for describing its central position, length, width and area are presented.It is demonstrated that the over standard pollutant zone reaches it maximum size which is presented by S_m= m/hC_0e under the condition of C_m= C_0e.In the equation, S_m varies with the quantity of pollutant discharged, dispersion water depth(h) and initial concentration(C₀)

• Key words：instantaneous point source  pollutant zone feature  the maximum over standard area.

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