Sewage abatement and coliform bacteria trends in the lower Hudson-Raritan Estuary since passage of the Clean Water Act
Sewage abatement and coliform bacteria trends in the lower Hudson-Raritan Estuary since passage of the Clean Water Act
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自《清洁水法》通过以来哈德逊-拉里坦河口下游的污水减少和大肠菌群趋势
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
M. O’Shea
中科院分区：
文献类型：
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作者：
T. Brosnan;M. O’Shea
自1972年《清洁水法》通过以来，整个哈德逊-拉里坦河口都在建造和升级水污染控制工厂。这减少了未经处理的废水排放到河口，从1970年的约19.7立方米/秒（450 mgd）到1988年的不到0.2立方米/秒（5 mgd）。通过研究长期环境总大肠菌群监测数据集的趋势，评估了这对该区域水质的影响。从1968年到1993年，每年夏天都对总大肠菌群进行监测，作为整个哈德逊-拉里坦河口下游40个地点与废水有关的污染指标。大肠菌群在整个河口表现出显着的长期改善（即在过去26年中数量级的减少）。从1968年到1988年大肠菌群浓度的下降主要是对工厂建设和升级的反应。从1989年到1993年的持续下降归因于其他几个纽约市水污染控制计划。这些方案减少了0.045 5立方米/秒（1.04百万加仑/天）的非法排放;由于加强了对下水道的监督和检查，减少了0.15立方米/秒（3.4百万加仑/天）的原废水旁路;并增加了对潮湿天气合并下水道溢流的捕获。1993年，估计符合纽约州总大肠菌群和粪大肠菌群标准是有史以来最高的记录，这一计划。这些改善导致海滩重新开放并取消了潮湿天气沐浴警告。
Since the passage of the Clean Water Act in 1972, significant construction and upgrading of water pollution control plants has occurred throughout the Hudson-Raritan Estuary. This has reduced the discharge of untreated wastewater into the estuary from approximately 19.7 m 3 /s (450 mgd) in 1970 to less than 0.2 m 3 /s (5 mgd) by 1988. The impact of this on water quality in the region was assessed by examining trends in a long-term ambient total coliform monitoring data set. Total coliform bacteria have been monitored each summer from 1968 to 1993, as indicators of wastewater-related pollution at 40 sites throughout the lower Hudson-Raritan Estuary. Coliforms exhibit significant long-term improvements throughout the estuary (that is, order-of-magnitude reductions over the past 26 years). Declines in coliform concentrations from 1968 through 1988 are primarily in response to plant construction and upgrades. Continued declines from 1989 through 1993 are attributed to several other New York City water pollution control programs. These programs have resulted in the abatement of 0.045 5 m 3 /s (1.04 mgd) of illegal discharges; reduced raw wastewater bypassing by 0.15 m 3 /s (3.4 mgd) due to increased surveillance and inspection of sewers; and increased capture of wet weather combined sewer overflows. In 1993, estimated compliance with New York State total coliform and fecal coliform standards was the highest ever recorded by this program. These improvements have resulted in the reopening of beaches and the lifting of wet weather bathing advisories.