瞬时点源超标污染带的几何特征及面积最大值估计

THE GEOMETRIC FEATURE OF INSTANTANEOUS POINT SOURCE OVER STANDARD POLLUTANT ZONE AND THE ESTIMATION OF THE MAXIMUM AREA

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．

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 0 e.In the equation, S m varies with the quantity of pollutant discharged, dispersion water depth( h ) and initial concentration( C 0)