摘要
【目的】明确汾河中下游水环境容量,改善水质不断恶化的状况,促进地区经济与水环境容量的协调发展。【方法】在一维稳态水质模型的基础上对排污口进行概化,推导出河段水环境容量计算公式。根据已有水质、水文监测资料和沿岸排污情况,选取污染物中所占比例最大的化学需氧量（COD）和氨氮作为河段的主要污染控制因子,计算出复流前枯、平、丰各频率年和复流后COD、氨氮的水环境容量。【结果】汾河中下游复流前枯、平、丰各频率年COD、氨氮的全年水环境容量分别为27 454.63 t,1 107.40 t;40 910.53 t,1 621.34 t;55 832.85 t,2 202.48 t。复流后COD和氨氮的全年水环境容量分别为26 512.22 t,1 031.60 t。【结论】汾河中下游污染严重,结合现状排污量计算得COD和氨氮在各设计条件下全年削减量分别为0～20 949.08 t和6 443.72～7 614.61 t。
【Objective】 The study was done in order to know the environmental capacity and improve the continual deterioration of the water quality of lower-middle reaches of the Fen River,and promote the harmonious development of economy and aquatic environment.【Method】 Based on the 1-D steady-state water quality model,we generalized the outfall,then derived the formula for calculating water environmental capacity of each reach.We chose COD and ammonia nitrogen as main control factors,with the information of water quality,hydrology data and the discharge points distribution of dry year,normal-water year and wet year in pre-reflow and after reflow,and calculated the water environmental capacity of COD and ammonia with the formula.【Result】 Annual water environmental capacity of COD and ammonia in the lower-middle reaches of the Fen River on the condition of dry year,normal-water year and wet year in pre-reflow is respectively 27 454.63 t,1 107.40 t;40 910.53 t,1 621.34 t;55 832.85 t,2 202.48 t,and after reflow is respectively 26 512.22 t and 1 031.60 t.【Conclusion】 There is serious pollution in lower-middle reaches of the Fen River,under different design terms with the status quo emissions,the annual quantity of pollutants reduction of COD and ammonia arrive at 0-20 949.08 t and 6 443.72-7 614.61 t.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2010年第5期217-223,共7页
Journal of Northwest A&F University(Natural Science Edition)
基金
山西省水利厅科技计划基金项目(2008-6-19)
关键词
汾河中下游
水环境容量
一维稳态水质模型
污染物削减
lower-middle reach of the Fen River
water environmental capacity
1-D water quality model
quantity of pollutants reduction
