Due to frequent drinking water pollution accidents in the past decade, it is common that mountain reservoirs were used as the source of drinking water in China. However, some coastal areas frequently suffer from typho...Due to frequent drinking water pollution accidents in the past decade, it is common that mountain reservoirs were used as the source of drinking water in China. However, some coastal areas frequently suffer from typhoon with extreme precipitation, which results in the water quality deterioration of the reservoirs. The influence of typhoons with extreme precipitation on Jiaokou reservoir and the emergency treatment process of Maojiaping water treatment plant in the past three typical typhoons with extreme precipitation from the year of 2012-2015 were studied. It was found that the degradation of water quality, such as the increase of turbidity and bacteria index, may not merely appear during the events, but last for several days. Changing the dosage of water purification agent, such as coagulant and disinfectant at right time and place may be an efficient emergency water treatment process. Based on the analysis of water quality variation rule during and after the events, it was also found that emergency treatment can be fully prepared before the arrival of a typhoon with extreme precipitation. And in order to better respond to the typhoon with extreme precipitation, several suggestions are also proposed in this paper as follows: establishing vegetated buffers at right place, such as macrophanerophytes,shrub or herbage, increasing investments in infrastructure management, merging or cancelling the small-scale water treatment plants, preparing adequate water purification agent before the typhoon comes, etc.展开更多
Coastal cities represented by Ningbo are directly or indirectly affected by typhoons each year. By analyzing the past three typical typhoons landing in Ningbo from 2013 to 2016, it was found that before and after the ...Coastal cities represented by Ningbo are directly or indirectly affected by typhoons each year. By analyzing the past three typical typhoons landing in Ningbo from 2013 to 2016, it was found that before and after the typhoon transit, reservoir and water treatment plant would be made by the destructive impact, including the increasing water level, water volume in a short time, and the deteriorating water quality. Among those, the water quality caused by typhoons increased the water treatment process load, the amount of water purification agents increased significantly,and the emergency response put a great pressure on the inventory of water plants. Based on the statistics and analysis of the basic parameters of the reservoir and water treatment plant during the typhoon season, the emergency management of the typhoon was divided into three situations, namely, pre-typhoon, typhoon period and post-typhoon. Thus, it is effective for the relevant practitioners of the reservoir and water plant to ensure the safe water supply during typhoon season.展开更多
Siminghu Reservoir already transformed into ＂ the algae muddy＂ type,and had nonclassical bio-manipulation practice using Hypophthalmichthys molitix and Aristichthys nobilis to feed the plankton,control water bloom a...Siminghu Reservoir already transformed into ＂ the algae muddy＂ type,and had nonclassical bio-manipulation practice using Hypophthalmichthys molitix and Aristichthys nobilis to feed the plankton,control water bloom and transform the organic matters into fish product. Through the analysis of the limited data,we think that water bloom of Siminghu Reservoir can be prevented to some extent by breeding H. molitix and A. nobilis,and it can slow down eutrophication of reservoir but cannot control the eutrophication tendency. We must take a variety of comprehensive management measures to control eutrophication from the angle of basin control,and guarantee safety of drinking water resources.展开更多
基金supported by the National Science Foundation of China(NSFC)(grant number 51438006)Priority Academic Program Development of Jiangsu Higher Education Institutions
文摘Due to frequent drinking water pollution accidents in the past decade, it is common that mountain reservoirs were used as the source of drinking water in China. However, some coastal areas frequently suffer from typhoon with extreme precipitation, which results in the water quality deterioration of the reservoirs. The influence of typhoons with extreme precipitation on Jiaokou reservoir and the emergency treatment process of Maojiaping water treatment plant in the past three typical typhoons with extreme precipitation from the year of 2012-2015 were studied. It was found that the degradation of water quality, such as the increase of turbidity and bacteria index, may not merely appear during the events, but last for several days. Changing the dosage of water purification agent, such as coagulant and disinfectant at right time and place may be an efficient emergency water treatment process. Based on the analysis of water quality variation rule during and after the events, it was also found that emergency treatment can be fully prepared before the arrival of a typhoon with extreme precipitation. And in order to better respond to the typhoon with extreme precipitation, several suggestions are also proposed in this paper as follows: establishing vegetated buffers at right place, such as macrophanerophytes,shrub or herbage, increasing investments in infrastructure management, merging or cancelling the small-scale water treatment plants, preparing adequate water purification agent before the typhoon comes, etc.
基金supported by the National Science Foundation of China(NSFC)(Grant number.51438006)Priority Academic Program Development of Jiangsu Higher Education Institutions
文摘Coastal cities represented by Ningbo are directly or indirectly affected by typhoons each year. By analyzing the past three typical typhoons landing in Ningbo from 2013 to 2016, it was found that before and after the typhoon transit, reservoir and water treatment plant would be made by the destructive impact, including the increasing water level, water volume in a short time, and the deteriorating water quality. Among those, the water quality caused by typhoons increased the water treatment process load, the amount of water purification agents increased significantly,and the emergency response put a great pressure on the inventory of water plants. Based on the statistics and analysis of the basic parameters of the reservoir and water treatment plant during the typhoon season, the emergency management of the typhoon was divided into three situations, namely, pre-typhoon, typhoon period and post-typhoon. Thus, it is effective for the relevant practitioners of the reservoir and water plant to ensure the safe water supply during typhoon season.
基金Supported by Science and Technology Plan Project of Zhejiang Province,China(2013C33033)
文摘Siminghu Reservoir already transformed into ＂ the algae muddy＂ type,and had nonclassical bio-manipulation practice using Hypophthalmichthys molitix and Aristichthys nobilis to feed the plankton,control water bloom and transform the organic matters into fish product. Through the analysis of the limited data,we think that water bloom of Siminghu Reservoir can be prevented to some extent by breeding H. molitix and A. nobilis,and it can slow down eutrophication of reservoir but cannot control the eutrophication tendency. We must take a variety of comprehensive management measures to control eutrophication from the angle of basin control,and guarantee safety of drinking water resources.
