The seasonal variation characteristics of the water quality of the Jinpen Reservoir and the impacts of rainfall runoff on the reservoir were investigated. Water quality monitoring results indicated that, during the st...The seasonal variation characteristics of the water quality of the Jinpen Reservoir and the impacts of rainfall runoff on the reservoir were investigated. Water quality monitoring results indicated that, during the stable stratification period, the maximum concentrations of total ni- trogen, total phosphorus, ammonia nitrogen, total organic carbon, iron ion, and manganese ion in the water at the reservoir bottom on September 6 reached 2.5 mg/L, 0.12 mg/L, 0.58 mg/L, 3.2 mg/L, 0.97 mg/L, and 0.32 rag/L, respectively. Only heavy storm runoff can affect the main reservoir and cause the water quality to seriously deteriorate. During heavy storms, the stratification of the reservoir was destroyed, and the reservoir water quality consequently deteriorated due to the high-turbidity particulate phosphorus and organic matter in runoff. The turbidity and concentrations of total phosphorus and total organic carbon in the main reservoir increased to 265 NTU, 0.224 mg/L, and 3.9 mg/L, respectively. Potential methods of dealing with the water problems in the Jinpen Reservoir are proposed. Both in stratification and in storm periods, the use of measures such as adjusting intake height, storing clean water, and releasing turbid flow can be helpful to safeguarding the quality of water supplied to the water treatment plants.展开更多
The reason why the Changxing Island should be the water resource island of Shanghai City is dis-cussed based on the analysis of the natural conditions of the island. Tentative ideas on engineering design and suggestio...The reason why the Changxing Island should be the water resource island of Shanghai City is dis-cussed based on the analysis of the natural conditions of the island. Tentative ideas on engineering design and suggestions for pre-engineering study are proposed.展开更多
Forty middle and small rivers in three towns of Fengjing, Songjiang and Zhujiajiao of suburban Shanghai were chosen as sampling sites for water quality research. Measurement results of DO, CODCr, TP, TN and so on show...Forty middle and small rivers in three towns of Fengjing, Songjiang and Zhujiajiao of suburban Shanghai were chosen as sampling sites for water quality research. Measurement results of DO, CODCr, TP, TN and so on show that the rivers are under heavy eutropic conditions, which are several times greater than the critical values of the worst level (Type V) of water. Water pollution situation has different temporal and spatial characteristics. Non-point pollution, such as village domestic sewage, farmland runoff, livestock feces, has become the primary source of pollution of the middle and small rivers in suburban Shanghai.展开更多
Shanghai is the biggest industrial city in China, and the problem of environmental pollution is rather serious. This article, taking Shanghai as an example, is to discuss: a general view of Shanghai's environment;...Shanghai is the biggest industrial city in China, and the problem of environmental pollution is rather serious. This article, taking Shanghai as an example, is to discuss: a general view of Shanghai's environment; the present situation and characteristics of cancer in Shanghai; analyses of the environmental factors of some kinds of cancers. The paper emphasizes the relationship between the environment and cancer in Shanghai, especially the environmental pollution and cancer. The aim of the article is not only to call people's concern to the pollution , but also to study the causes of some cancers.展开更多
In aquaculture,it is important to estimate in advance how much food cultured animals would take.The rate of food consumption by cultured animals to available food amount is defined as the food intake rate(FIR) in this...In aquaculture,it is important to estimate in advance how much food cultured animals would take.The rate of food consumption by cultured animals to available food amount is defined as the food intake rate(FIR) in this paper.To some extents,FIR reflects the quality of food,the health of cultured animals and the delivery efficiency.In practice,it is difficult to estimate in advance the accurate quantity of food that cultured animal needs.Usually,food is provided more than the need by animals,causing excess food that may pollute water and environment.Our experiments in past years show that FIR at 80% is recommended.展开更多
基金supported by the National Science and Technology Pillar Program(Grant No.2012BAC04B02)the National Natural Science Foundation of China(Grant No.51478378)
文摘The seasonal variation characteristics of the water quality of the Jinpen Reservoir and the impacts of rainfall runoff on the reservoir were investigated. Water quality monitoring results indicated that, during the stable stratification period, the maximum concentrations of total ni- trogen, total phosphorus, ammonia nitrogen, total organic carbon, iron ion, and manganese ion in the water at the reservoir bottom on September 6 reached 2.5 mg/L, 0.12 mg/L, 0.58 mg/L, 3.2 mg/L, 0.97 mg/L, and 0.32 rag/L, respectively. Only heavy storm runoff can affect the main reservoir and cause the water quality to seriously deteriorate. During heavy storms, the stratification of the reservoir was destroyed, and the reservoir water quality consequently deteriorated due to the high-turbidity particulate phosphorus and organic matter in runoff. The turbidity and concentrations of total phosphorus and total organic carbon in the main reservoir increased to 265 NTU, 0.224 mg/L, and 3.9 mg/L, respectively. Potential methods of dealing with the water problems in the Jinpen Reservoir are proposed. Both in stratification and in storm periods, the use of measures such as adjusting intake height, storing clean water, and releasing turbid flow can be helpful to safeguarding the quality of water supplied to the water treatment plants.
文摘The reason why the Changxing Island should be the water resource island of Shanghai City is dis-cussed based on the analysis of the natural conditions of the island. Tentative ideas on engineering design and suggestions for pre-engineering study are proposed.
基金National Natural Science Foundation of China No.40131020+4 种基金 No.40173030 Key Project for Basic Research of Shanghai No.02DJ14029 Project Foundation for Excellent Young Teachers of the Ministry of Education of China Ration Research of Phosphorus and
文摘Forty middle and small rivers in three towns of Fengjing, Songjiang and Zhujiajiao of suburban Shanghai were chosen as sampling sites for water quality research. Measurement results of DO, CODCr, TP, TN and so on show that the rivers are under heavy eutropic conditions, which are several times greater than the critical values of the worst level (Type V) of water. Water pollution situation has different temporal and spatial characteristics. Non-point pollution, such as village domestic sewage, farmland runoff, livestock feces, has become the primary source of pollution of the middle and small rivers in suburban Shanghai.
文摘Shanghai is the biggest industrial city in China, and the problem of environmental pollution is rather serious. This article, taking Shanghai as an example, is to discuss: a general view of Shanghai's environment; the present situation and characteristics of cancer in Shanghai; analyses of the environmental factors of some kinds of cancers. The paper emphasizes the relationship between the environment and cancer in Shanghai, especially the environmental pollution and cancer. The aim of the article is not only to call people's concern to the pollution , but also to study the causes of some cancers.
基金Supported by the National Science Foundation of China, Key Lab. of Marine Ecology & Environment, Ministry of Education, Ocean University of Chinathe National High-Technology R&D Program of China (863 Program, No. 2006AA09Z418)
文摘In aquaculture,it is important to estimate in advance how much food cultured animals would take.The rate of food consumption by cultured animals to available food amount is defined as the food intake rate(FIR) in this paper.To some extents,FIR reflects the quality of food,the health of cultured animals and the delivery efficiency.In practice,it is difficult to estimate in advance the accurate quantity of food that cultured animal needs.Usually,food is provided more than the need by animals,causing excess food that may pollute water and environment.Our experiments in past years show that FIR at 80% is recommended.
