Study on the Transport Processes of Pb in Jiaozhou Bay

2014 ◽  
Vol 651-653 ◽  
pp. 1292-1294 ◽  
Author(s):  
Dong Fang Yang ◽  
Si Xi Zhu ◽  
Feng You Wang ◽  
Xiu Qing Yang ◽  
Yun Jie Wu
Keyword(s):  
Seasonal Variations ◽  
Jiaozhou Bay ◽  
Transport Processes ◽  
Ocean Current ◽  
June July ◽  
Different Sources

Based on investigation dada on Pb in April, June, July and October 1982, this paper analyzed the transportation of Pb in Jiaozhou Bay. Results showed that atmosphere deposition, ocean current from the offshore, and the transportation of the head of the islands were the major sources of Pb. These different sources determined different transportation processes of Pb, displayed seasonal variations of Pb content and distribution.

The Variation of the Contents of Pb in Surface Waters in Jiaozhou Bay

2014 ◽  
Vol 651-653 ◽  
pp. 1492-1495 ◽  
Author(s):  
Dong Fang Yang ◽  
Hong Guang Ge ◽  
Feng Min Song ◽  
Chen Li ◽  
Bo Yang
Keyword(s):  
Surface Waters ◽  
Sea Water ◽  
Jiaozhou Bay ◽  
Pollution Prevention ◽  
Quality Standard ◽  
Ocean Current ◽  
Different Seasons ◽  
Grade Ii ◽  
June July ◽  
And Control

This paper analyzed the content and distribution of Pb in surface waters in Jiaozhou Bay in 1982. Results showed that Pb content in April, June, July and October ranged from 0.49-3.25μg.L-1, 0.45-3.35μg.L-1, 0.30-2.67μg.L-1and 0.33-0.67μg.L-1, respectively, complied with Grade I (1.00μg.L-1) or Grade II (5.00μg.L-1) in Sea water quality standard (GB 3097-1997) of China. As a whole, Jiaozhou Bay waters in 1982 was very lightly polluted by Pb. Non-point source was the major source of Pb in this bay, including atmosphere deposition, ocean current from the offshore, and the transportation of the head of the islands. The content, distribution and source of Pb showed significant seasonal variations, and different pollution prevention and control measurements should be took in different seasons.

Contents and Sources of Zn in Jiaozhou Bay

2015 ◽  
Vol 1092-1093 ◽  
pp. 1021-1024
Author(s):  
Dong Fang Yang ◽  
Si Xi Zhu ◽  
Feng You Wang ◽  
Xiu Qin Yang ◽  
Hua Zhong He
Keyword(s):  
Water Quality ◽  
Surface Waters ◽  
Sea Water ◽  
Jiaozhou Bay ◽  
Quality Standard ◽  
Ocean Current ◽  
Grade Ii ◽  
Overland Runoff ◽  
June July ◽  
Grade Iii

This paper analyzed the content, distribution and source of Zn in Jiaozhou Bay in 1982. Results showed that the Zn contents in surface waters in April, June, July and October ranged from 1.75-167.71 μg.L-1, 8.31-36.97 μg.L-1, 7.05-12.18 μg.L-1 and 1.75-5.25 μg.L-1, respectively. Cu contents in most of the monitoring sites in April were meeting Grade III or Grade IV in National Sea Water Quality Standard (GB 3097-1997). While most of the monitoring sites in June, July and October were meeting Grade I or Grade II. The major Zn sources in the bay was overland runoff, ocean current, and deposition, whose input contents ranged from 37.90-167.71 μg.L-1, 1.31-36.97μg.L-1 and 1.75-12.18 μg.L-1.

Seasonal variations in the component fatty acid distributions of the lipids of Balanus balanoides

1972 ◽  
Vol 52 (4) ◽  
pp. 839-845 ◽  
Author(s):  
Doris Gardner ◽  
J. P. Riley
Keyword(s):  
Fatty Acid ◽  
Seasonal Variations ◽  
Marked Decrease ◽  
Early Spring ◽  
Component Fatty Acid ◽  
Lipid Fractions ◽  
Phospholipid Ratio ◽  
June July ◽  
Food Reserves ◽  
Balanus Balanoides

A study has been made of the seasonal variations in the component acids of the lipid fractions of Balanus balanoides. The relative proportions of the polyenoic acids in the triglycerides drop sharply during the winter. They reach a minimum in the early spring and then gradually rise to a maximum in the late autumn. These changes are largely balanced by increases in the saturated acids, principally 16:0 and 18 :o.1 During the winter there is a marked decrease in the triglyceride to phospholipid ratio as the depot fats are mobilised as food reserves. The proportions of the polyethenoid acids in the phospholipids decline slowly during the winter and spring and attain their minimum in June-July. This fall is mainly counterbalanced by increases in the amounts of saturated acids, principally 14:0 and 16:0. It seems likely that the observed decreases in the polyenoic acids are brought about by selective utilization of these compounds as reserves during the winter when food is scarce and depot lipid has been depleted.

The cattle lice of Great Britain Part II. Lice populations

Parasitology ◽  
1941 ◽  
Vol 33 (3) ◽  
pp. 343-358 ◽  
Author(s):  
H. J. Craufurd-Benson
Keyword(s):  
Great Britain ◽  
Seasonal Variations ◽  
Climatic Factors ◽  
Regional Distribution ◽  
Field Research ◽  
Rapid Decline ◽  
Research Station ◽  
Seasonal Fluctuations ◽  
Host Animal ◽  
June July

1. The seasonal variations and regional distribution of the cattle lice have been studied by monthly examinations of cattle at the Cooper Field Research Station.2. Additional evidence has been obtained by the distribution of a questionnaire to farmers, the general results of which are included in this paper.3. The seasonal variations of the populations of the four species of cattle lice in Great Britain are similar. The maximum population density is reached in February and March. In April and May there is a rapid decline until the populations reach their lowest level in June, July and August. In September, the lice start increasing in numbers till they reach their maximum density in February and March.4. The regional distribution of the population varies in accordance with the seasonal variations of the whole population.5. The various climatic factors that may affect the lice populations are discussed. It is considered that the light intensity is a factor of major importance in this country.6. The various factors inherent in the host animal are discussed, and it is suggested that the seasonal fluctuations of the density of the animal's coat are important.7. The finding of a previous paper (Craufurd-Benson, 1941) that the microclimatic temperature is important as affecting the hatching of eggs is discussed in relation to the variations of lice populations as a whole.

Distributions and seasonal variations of dissolved carbohydrates in the Jiaozhou Bay, China

2010 ◽  
Vol 88 (1) ◽  
pp. 12-20 ◽  
Author(s):  
Gui-Peng Yang ◽  
Yan-Ping Zhang ◽  
Xiao-Lan Lu ◽  
Hai-Bing Ding
Keyword(s):  
Seasonal Variations ◽  
Jiaozhou Bay

scholarly journals Spatiotemporal Variation of Pb Content Source Transportation in Jiaozhou Bay

2020 ◽  
Vol 185 ◽  
pp. 02014
Author(s):  
Dongfang Yang ◽  
Hong Zhu ◽  
Longlei Zhang ◽  
Qi Wang ◽  
Haixia Li
Keyword(s):  
Water Body ◽  
Change Process ◽  
Block Diagram ◽  
Jiaozhou Bay ◽  
Ocean Current ◽  
Delivery Time ◽  
Transportation Process ◽  
High Level ◽  
Migration Law ◽  
Very High

Based on research data of the Jiaozhou Bay waters in May, August, and October 1992, the current transportation process and the various sources of Pb contents in the Jiaozhou Bay water body were studied. According to the Yang Dongfang migration law of the content, the results show that: after the ocean current with high levels of Pb content enters the Jiaozhou Bay, spatial change process of the sources carrying Pb content in May, August and October is shown with the transportation of the ocean current. Also, the model block diagram is used to reveal the change process of Pb content imported by ocean currents into the waters of Jiaozhou Bay. The location, magnitude, type, and time of the four sources of Pb content in the waters of Jiaozhou Bay were determined, which are the transportation of ships and terminals, surface runoffs, rivers, and offshore currents. Pb content of surface runoff transport is relatively low, and the transport time is short. Whereas Pb content of the ship terminal is increasing, and the time of transportation is also raising. And the content of Pb transported by rivers is the highest, and it has been transporting from land to sea nonstop throughout the year. Offshore currents carry a very high level of Pb content and constantly transporting it to the water body with low content of Pb. During the year, ships and terminals, land, and rivers were heavily polluted by Pb content, as well as the entire ocean. Among the rivers entering the sea around Jiaozhou Bay, there are four main ones: Haibo River, Licun River, Loushan River, and Dagu River. The sequence of Pb content transported by the rivers from high to low is listed as following: Licun River>Loushan River>Dagu River>Haibo River. The delivery time of Pb content in Licun River is the longer as delivery time in Haibo River, Loushan River and Dagu River is the same. Therefore, it is necessary to strictly control the Pb content from river transportation.

Effect of Hg in Jiaozhou Bay Waters - Land Transfer Process

2014 ◽  
Vol 955-959 ◽  
pp. 2496-2500 ◽  
Author(s):  
Dong Fang Yang ◽  
Si Xi Zhu ◽  
Feng You Wang ◽  
Xiu Qin Yang
Keyword(s):  
Economic Growth ◽  
Decision Making ◽  
Transfer Process ◽  
Pollution Control ◽  
Seasonal Variations ◽  
Jiaozhou Bay ◽  
River Channel ◽  
Land Transfer ◽  
Anthropogenic Discharge ◽  
Industrial Adjustment

Based on the investigation data of mercury (Hg) in waters in Jiaozhou bay during time peroids of 1979 to 1985 (absent of 1984), this paper tried to analysis the seasonal variations of Hg in Jiaozhou Bay, to reveal the transfer process of Hg, and to provide basis for decision-making of pollution control. Results showed that, there was indistint seasonal variations of Hg content, due to anthropogenic discharge was the major source of Hg, which was not static, but depended on industrial adjustment. The land transfer process of Hg could be divided into three major processes: 1) human discharges of Hg to soil, waters, and atmosphere, etc., 2) Hg is washouted and delivered into streams, and 3) Hg is transferred to ocean via river channel runoff. In order to reconcile economic growth with environmental protection, we should have to improve the use ratio of Hg, and to reduce the discharge load of Hg.

Spatial and seasonal variations, partitioning and fluxes of dissolved and particulate nutrients in Jiaozhou Bay

2018 ◽  
Vol 171 ◽  
pp. 140-149 ◽  
Author(s):  
Huamao Yuan ◽  
Jinming Song ◽  
Jianwei Xing ◽  
Xuegang Li ◽  
Ning Li ◽  
...  
Keyword(s):  
Seasonal Variations ◽  
Jiaozhou Bay ◽  
Particulate Nutrients

Effect of Hg on Jiaozhou BayWaters – The Change Process of the Hg Pollution Sources

2014 ◽  
Vol 955-959 ◽  
pp. 1443-1447 ◽  
Author(s):  
Dong Fang Yang ◽  
Feng You Wang ◽  
Hua Zhong He ◽  
You Fu Wu ◽  
Si Xi Zhu
Keyword(s):  
Point Source ◽  
River Flow ◽  
Jiaozhou Bay ◽  
Pollution Source ◽  
Pollution Sources ◽  
Ocean Current ◽  
Point Source Pollution ◽  
Stream Discharge ◽  
High Pollution ◽  
Hg Pollution

Based on investigation data in Jiaozhou bay waters from 1979 to 1985(absent of 1984), this paper tried to anylysis the horizontal distributions and pollution sources and characteristics of Hg in Jiaozhou Bay. The results showed that, the horizonal distributions of Hg in surface water of Jiaozhou Bay showed decreasing trends from river flow direct, and the major pollution source of Hg was point source, whose pollutants were transferred by stream discharge. Under the influences of point source pollution, the Hg concentrations in surface waters could range from 0.46-13.04 μg.L-1; while under the influences of ocean current itself, the concentration of Hg in bay mouth area could range from 0.46-13.04 μg.L-1. The pollution sources of Hg in Jiaozhou Bay could be catagoried as two levels as high-pollution sources and non-pollution sources, due to Hg in this bay was mainly impacted by point source. It is necessary to enhance the recovery ratio of Hg, and to reduce the discharge of Hg.

The variations in milk yields caused by season of the year, service, age, and dry period, and their elimination: Part IV. Dry period, and standardisation of yields

1928 ◽  
Vol 18 (2) ◽  
pp. 209-251 ◽  
Author(s):  
H. G. Sanders
Keyword(s):  
Statistical Analysis ◽  
Seasonal Variations ◽  
Dry Period ◽  
Catch Crops ◽  
June July

This paper describes a statistical analysis of the records collected by the Norfolk Milk Recording Society (3918 lactations), comparing the results with those obtained from the records of the Penrith M.R.S. (already published).As in the case of Penrith, autumn calvers were found to average more milk in a lactation than spring calvers, but the best months of calving were two months later—i.e. October to February instead of August to December; this is because in the case of Norfolk, yields are maintained well throughout the winter, whereas they fall off very rapidly in the Penrith district from February to April, and if this bad period comes early in the lactation a low yield results. The yield falls off, in both districts, very rapidly during summer (after the flush of grass in spring) and particularly during the two periods June-July and September-October; the average rates at which the yield declines during different calendar months, appears to provide the explanation of the variation in yield according to the month of calving. Seasonal variations appear to be nutritional, rather than meteorological, in nature, and it seems probable that with more knowledge of feeding and management they should be largely eliminated; the greatest scope for improvement lies in summer, when it is suggested arrangements should be made for a supply of catch-crops for feeding green, and this supplementing of the grass should begin much earlier in the year—i.e. beginning of June in normal seasons—than is generally believed.

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