摘要
水环境容量测算是实施总量控制的前提,其大小与污染控制的模式有关。以四川省西南地区某河流的一段为例,在一维稳态条件以及两种计算单元划分依据下(以控制断面或概化排污口所在断面为节点),用段首法、段尾法以及控制断面法三种不同的污染控制模式进行水环境容量测算。测算结果表明:段首法最为严格,适于经济发达地区、水源地或旨在改善水质的区域;段尾法次之,但在其控制下得到的容量与段首法相差不大,适于经济较发达地区;断面控制法,要求达到的环境目标值低,适于我国当前的国情。指出在思维定势下,段首、段尾控制中容易出现以控制断面为节点的计算单元错误划分,分析了该错误导致计算结果异常的原因是稀释容量重复计算而自净容量计算不充分。
Comparative study was carried out on a certain section of a river with regard to water pollution control in order to estimate its assimilative capacity under different contexts,i.e.,section-head control,section-end control and cross-section control.Based on the one-dimensional steady-state modeling and two different divisions of calculation unit,the authors found section-head control would give the most rigorous result in terms of the assimilative capacity,which meant it＇s suitable for pollution control in the economically developed region or where water quality was in first priority such as for drinking water protection.Next was section-end control,and cross-section control was much less demanding.Some drawbacks,which might lead to miscalculating dilution capacity of the river,involved in the pollution control modes of section-head control,section-end control were discussed.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2011年第3期144-148,共5页
Environmental Science & Technology
基金
成都市"十二五"规划前期研究重大课题--成都市生态环境容量及节能减排研究(成都市发改委0030505301054)
米易县环境容量测算与污染减排规划(07H702)
关键词
水环境容量
总量控制
控制断面法
段首控制法
段尾控制法
assimilative capacity
total pollutant amount control
cross-section control
section-head control
section-end control
