The Non Dredged Reclamation Method

The Non Dredged Reclamation Method With the rapid economic and population growth, various economic, social, housing and transport needs of the community are increasing, resulting in increasing demand for land supply. Due to the limited land supply, reclamation is commonly used to tackle the problem in Hong Kong. However, reclamation does not only contribute to the economic development but also the environmental degradation. In this essay, problems caused by reclamation and possible solutions will be discussed. As mentioned in Environmental Impact Assessment Report (2001), dredging, disposal of marine mud and bulk filling activities may give rise to many potential impacts on water quality. Firstly, solids may be suspended in the water column. Secondly, as mud waves and turbulent flow will be generated, by disturbance, organic and inorganic substances e.g. ammonia, heavy metals and sulphides may be released into the water column. Thirdly, during the compacting and settling process in site formation, contaminants and leachate may be given out from pore water and sediments respectively. As a result, the marine water quality will be deteriorated. 2.2 Marine ecosystem According to Chan (2000), dredging and disposal of waste involved in reclamation will bring adverse effects to the marine ecosystem. Firstly, removal of sediment may lead to the loss of habitat. Secondly, marine organisms may entrain during dredging. Thirdly, dissolved oxygen will be depleted and nutrients will be released into the water. In particular, if there is a significant rise in the nutrient level, algal productivity will increase which may result in à ¢Ã¢â€š ¬Ã…“red tidesà ¢Ã¢â€š ¬Ã‚ . 2.3 Air quality The problem of air pollution will arise during the operation period of reclamation as a large amount of dust will be emitted where the à ¢Ã¢â€š ¬Ã…“dustà ¢Ã¢â€š ¬Ã‚  here refers to general suspended particulates. Among various kinds of origins of air pollution, earthmoving (loading, unloading and bulldozing), haul road traffic on unpaved roads and wind erosion of the open site area lower the air quality the most (Chan, 2000). Solutions 3.1 The non-dredged reclamation method Traditionally, the soft marine mud in the seabed is replaced by sand fill to make a strong foundation for seawall construction. Dredging and disposing of marine mud are thus involved. As the dredging process in reclamation is the fundamental cause for the environmental impacts mentioned above, the non-dredged reclamation method is advocated for the future reclamation projects. Making reference to Hong Kong-Zhuhai-Macau Bridge Hong Kong Projects (2011), this reclamation method does not require dredging the soft marine mud in the seabed before backfilling. Instead, inert construction and demolition material is used to fill many large interlocked steel cells. The steel cells will then sink in the water and stay on the alluvium, forming the perimeter wall. (Items, 2011) As found in Items (2011), the non-dredge reclamation has many benefits over the conventional dredge seawall construction method. For instance, dredging and dumping of marine mud can be almost completely avoided. Also, only 30% of the original suspended particles will be released during reclamation and only half of the backfilling material will be needed. Thus the construction marine traffic can be decreased by about 50%. It can be concluded that the non-dredge reclamation method will bring less environmental impacts and therefore it is a better choice for reclamation. 3.2 Development of underground space Enhanced use of underground space is an effective and feasible alternative to increase land supply as Hong Kong is mountainous and abundant with strong volcanic and granitic rocks. This geographic characteristic favours the development of underground space in Hong Kong. Rock caverns can be developed for various land uses such as crematorium, substation, sewage treatment facilities etc (Hong Kong Underground Space Study Executive Summary, 2009). While both measures can relieve the problem of lack of available land, developing underground space has some advantages over reclamation. For example, some undesirable uses like refuse collection point can be built underground so that the impacts on the residents living nearby can be minimised. Moreover, developing underground space does not cause much pollution or take away natural resources, which means that the natural environment can be preserved. Conclusion Though reclamation can provide for the requirements of the economic development, the conventional reclamation method causes water pollution, air pollution and adversely affects the marine ecosystem, which is not an ideal act for the society. In order to strike a balance between economic growth and environmental conservation, the non-dredged reclamation method should be adopted for future reclamation projects as it is more environmentally friendly. In addition to reclamation, development of underground space should be considered which can act as an alternative to increase land supply and reserve our valuable harbour.

Thermal Physics :: essays research papers

Thermal Physics – 340  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Exam #1 Due Monday, February 18th, at the start of class As discussed in class, submission of your solutions to this exam will indicate that you have not communicated with others concerning this exam. You may use reference texts and other information at your disposal. Do all problems separately on clean white standard 8.5† X 11† photocopier paper (no notebook paper or scratch paper). Write on only one side of the paper (I don’t do double sided). Staple the entire solution set in the upper left hand corner (no binders or clips). Don’t turn in pages where you have scratched out or erased excessively, re-write the pages cleanly and neatly. All problems are equally weighted. Assume we are working with â€Å"normal† pressures and temperatures with ideal gases unless noted otherwise. Make sure you list all assumptions that you use (symmetry, isotropy, binomial expansion, etc.). 1. A container has one wall which contains many small holes, and outside the container is vacuum. If the container is filled with He at pressure Po, it is found that after one hour the pressure inside the container is Po/2. The container is now filled with an equal number of He and Ne atoms to a total pressure of Po. (a). Calculate the ratio of the number of Ne to He atoms left in the container after one hour. (b). Would this problem be more difficult if the atoms were initially C and H? Explain from two standpoints, the realistic standpoint and the physics-land standpoint. The latter explanation should invoke the assumptions made in the ideal gas model, the former something you know about chemistry. (c). Explain why such a container might be useful in the case of isotopes, especially a series of such containers set up so that what comes out of the first goes into the second and so on. 2. A He and H atom collide elastically in a head-on collision. (a). If they have the same kinetic energy (KE) to begin with, which one gains KE? Answer this by calculating the amount gained and lost for both, relative to their initial value. (b). Suppose the atoms had the same mass but different kinetic energies? Do not do a detailed calculation here, but instead make a physical argument as to why the â€Å"slower† thus â€Å"cooler† atoms would slow down the faster, hotter atoms. This is one process for the moderation of hot neutrons in a nuclear fission reactor by the water used as its coolant. Thermal Physics :: essays research papers Thermal Physics – 340  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Exam #1 Due Monday, February 18th, at the start of class As discussed in class, submission of your solutions to this exam will indicate that you have not communicated with others concerning this exam. You may use reference texts and other information at your disposal. Do all problems separately on clean white standard 8.5† X 11† photocopier paper (no notebook paper or scratch paper). Write on only one side of the paper (I don’t do double sided). Staple the entire solution set in the upper left hand corner (no binders or clips). Don’t turn in pages where you have scratched out or erased excessively, re-write the pages cleanly and neatly. All problems are equally weighted. Assume we are working with â€Å"normal† pressures and temperatures with ideal gases unless noted otherwise. Make sure you list all assumptions that you use (symmetry, isotropy, binomial expansion, etc.). 1. A container has one wall which contains many small holes, and outside the container is vacuum. If the container is filled with He at pressure Po, it is found that after one hour the pressure inside the container is Po/2. The container is now filled with an equal number of He and Ne atoms to a total pressure of Po. (a). Calculate the ratio of the number of Ne to He atoms left in the container after one hour. (b). Would this problem be more difficult if the atoms were initially C and H? Explain from two standpoints, the realistic standpoint and the physics-land standpoint. The latter explanation should invoke the assumptions made in the ideal gas model, the former something you know about chemistry. (c). Explain why such a container might be useful in the case of isotopes, especially a series of such containers set up so that what comes out of the first goes into the second and so on. 2. A He and H atom collide elastically in a head-on collision. (a). If they have the same kinetic energy (KE) to begin with, which one gains KE? Answer this by calculating the amount gained and lost for both, relative to their initial value. (b). Suppose the atoms had the same mass but different kinetic energies? Do not do a detailed calculation here, but instead make a physical argument as to why the â€Å"slower† thus â€Å"cooler† atoms would slow down the faster, hotter atoms. This is one process for the moderation of hot neutrons in a nuclear fission reactor by the water used as its coolant.

On Making Friends

As a human being, one can hardly do without a friend, for life without friends will be a lonely voyage in the vast dark sea or one in the barren desert. Traly, a friend gives out light and warmth like a lamp. For this reason, I have always felt it a blessing if a friend comes to console me in my sadness, cheer me up in my low spirits, or heartedly share with me my happiness. It is wonderful, too, to feel that someone is standing by me and ready to provide help and encouragement in my pursuit of a noble and glorious cause. For millions of years, people have heaped beautiful verses and essays upon friendship.Yet, they, too, have mercilessly accused false friendship, for there are always some mean characters who approach you and act as dear friends when you are wealthy or influential, but desert or even betray you the instant you come down in the world or are entrapped by unfortunate things. Therefore, people all attach great importance to the recognition of true friendship. And a faith ful friend is considered even more precious than a priceless pearl or a precious stone. The old saying â€Å"A friend in need is a friend indeed† has become the teaching and standard for true friends.Still, it is natural that different people observe different principles in making friends. Some view it important to make friends with whom they may share similar interests or hobbies with. Others are liable to befriend VIPs so as to gain some favors or privileges. And I am of those who think very little of similarity or position or power. So long as a person has a heart of gold, being warm-hearted, selfless, honest, open-minded, but not brutal, cold, shortsighted nor narrow~minded, I am willing to make friends with him or her, give my due support and help, and remain faithful to him or her all my life. On Making Friends As a human being, one can hardly do without a friend, for life without friends will be a lonely voyage in the vast dark sea or one in the barren desert. Traly, a friend gives out light and warmth like a lamp. For this reason, I have always felt it a blessing if a friend comes to console me in my sadness, cheer me up in my low spirits, or heartedly share with me my happiness. It is wonderful, too, to feel that someone is standing by me and ready to provide help and encouragement in my pursuit of a noble and glorious cause. For millions of years, people have heaped beautiful verses and essays upon friendship.Yet, they, too, have mercilessly accused false friendship, for there are always some mean characters who approach you and act as dear friends when you are wealthy or influential, but desert or even betray you the instant you come down in the world or are entrapped by unfortunate things. Therefore, people all attach great importance to the recognition of true friendship. And a faith ful friend is considered even more precious than a priceless pearl or a precious stone. The old saying â€Å"A friend in need is a friend indeed† has become the teaching and standard for true friends.Still, it is natural that different people observe different principles in making friends. Some view it important to make friends with whom they may share similar interests or hobbies with. Others are liable to befriend VIPs so as to gain some favors or privileges. And I am of those who think very little of similarity or position or power. So long as a person has a heart of gold, being warm-hearted, selfless, honest, open-minded, but not brutal, cold, shortsighted nor narrow~minded, I am willing to make friends with him or her, give my due support and help, and remain faithful to him or her all my life.

Sally Hemings Children

Sally Hemings' Children When James Thomas Callender published allegations in 1802 alleging that Sally Hemings was not just Thomas Jeffersons slave, but his concubine, it was the beginning but not the end of public speculation on the parentage of Hemings children. Sally Hemings Own Genealogy Sally Hemings  was  a slave owned by Jefferson who came to him through his wife,  Martha Wayles Skelton Jefferson. She may have been Martha Jeffersons half-sister, fathered by Marthas father, John Wayles.   Sallys mother, Betsy (or Betty), was herself the daughter of a white ship captain and a black slave woman, so Sally may have had just one black grandparent.   Nevertheless, the laws of the time made Sally, and her children no matter who was the father, also slaves. Birth Dates The birth dates of six children of   Sally Hemings  were recorded by Thomas Jefferson in his letters and records. Descendants of Madison Hemings and Eston Hemings are known. The evidence is mixed for a son who may have been born to Hemings when she returned from Paris. Descendents of Thomas Woodson claims that he was that son. One way to look at the likelihood of Jefferson as the father of the Hemings children is to see whether Jefferson was present at Monticello and whether that is within a reasonable conception window for each child. The following chart summarizes the known  birth dates and the dates of Jeffersons presence at Monticello within that conception window: Name Birth Date Jefferson atMonticello Death Date Harriet October 5, 1795 1794 and 1795 all year December 1797 Beverly April 1, 1798 July 11 - December 5, 1797 probably after 1873 Thenia? aboutDecember 7, 1799 March 8 - December 21, 1799 soon after birth Harriet May 1801 May 29 - November 24, 1800 probably after 1863 Madison January (19?), 1805 April 4 - May 11, 1804 November 28, 1877 Eston May 21, 1808 August 4 - September 30, 1807 January 3, 1856 What Happened to These Children and Their Descendants? Two of Sallys documented children (a first Harriet and a girl possibly named Thenia) died in infancy (plus, possibly, the child named Tom who was born shortly after the return from Paris). Two others―Beverly and Harriet―ran in 1822, were never formally freed, but disappeared into white society. Beverly probably died after 1873, and Harriet after 1863. Their descendants are not known, nor do historians know what names they used after their escape. Jefferson spent minimal effort to track them after their departure, lending credence to the theory that he let them go purposely. Under an 1805 Virginia law, if hed freed them or any slave, that slave would not be able to remain in Virginia. Madison and Eston, the youngest of the children, both born after the 1803 Callendar revelations, were freed in Jeffersons will, and were able to remain in Virginia for some time, as Jefferson had requested a special act of the Virginia legislature to permit them to stay contrary to the 1805 law. Both worked as tradesmen and musicians, and ended up in Ohio. Estons descendents at some point lost their memory of being directly descended from Jefferson and from Sally Hemings, and were unaware of a black heritage. Madisons family includes descendents of three of his daughters. Eston died January 3, 1856 and Madison died November 28, 1877.

Free Essays on Phonics In Schools

by asking questions and coming up with their own answers. None of my students are on the same reading level or learn the same way. We cannot expect one form of curriculum, whether it is phonics or whole language, to help all children in California to read.... Free Essays on Phonics In Schools Free Essays on Phonics In Schools The article titled fah-niks (phonics), in the November 2001 Better Homes and Gardens magazine, suggests phonics is the â€Å"in† way of teaching reading, as opposed to the whole language approach which was introduced several years ago. Children learn to read by seeing a word’s meaning in context with the whole language approach. The phonics approach begins with letter sounds which blend into words. The article states that California performed poorly on the National Assessment of Educational Progress in Reading tests because the children were not taught phonics. Children do not learn how to read the same way. Some children do not understand the phonics concept of letters having sounds, blending together to create words. Other children do benefit from learning phonics. Educators need to expose students to not only phonics, but the whole language approach as well. If children in classrooms are exposed to different learning strategies, one of the teaching methods wi ll click in a child’s mind. Narrowing down the classroom to one approach to teach reading is not the way to reach each child individually. In my classroom, the four and five year old students are to be able to recognize all letters, capital and lower case, as well as cursive. They are also expected to be able to know all of the phonics sounds and be able to read. I am given a strict curriculum, which is not developmentally appropriate for their age, and does not have different teaching approaches. I have to figure out which child learns best from games, which child understands the concept of letters, sounds, and words by asking questions and coming up with their own answers. None of my students are on the same reading level or learn the same way. We cannot expect one form of curriculum, whether it is phonics or whole language, to help all children in California to read....

Browning ordinary men Essay Example | Topics and Well Written Essays - 500 words

Browning ordinary men - Essay Example According to the morals of the society, execution of mass murder by soldiers is an inhumane act that erodes morals accorded to life and its significance. The reason of committing the mass murder by the help of the soldiers is Germany was to uphold Germany’s superiority against other races (Browning 16). The soldiers that carried out this particular mass murder also demonstrated lack of humanity to the innocent Jews. Thousands of the recruited police and soldiers armed with ammunition surrounded the unarmed Jews with the intention only to kill them hardheartedly (Browning 6). In addition, the armed soldiers and police officers shoot the unarmed Jews with intent to kill in ravines, ditches and forests. Hence, soldiers as the perpetrators of the mass murder depicts how one during their time would turn to be influential such that he could dictate the existence of other especially the Jews who were the victims of the day. Consequently, this power and influential status of the soldi ers prompted them to commit atrocities. One of the significant aspects that transformed soldiers to merciless killers was their respective psychological transformations dictated by circumstances, which they were in during then. Respective psychological transformations experienced by soldiers compelled them to unleash torture as well as exterminate innocent and helpless Jews (Browning 171). Transformation in this case implies abrupt change due to circumstance from being or behaving like an ordinary man to individuals who are merciless and ready to participate in committing serious historical crimes against humanity, which is by killing the defenceless through shooting as they did to Jews. The perpetrators of the German holocaust showed a sense of loyalty and obedience to their government. Each perpetrator was a subject to the ruling government under the Nazi

Employability Skills Assignment Example | Topics and Well Written Essays - 3500 words

Employability Skills - Assignment Example According to Arthur (2012), every store has a store manager so do Flagship store. It is the responsibility of the store manager to see that the store achieves its target and earns profit. It is his duty to see that the image of the store is maintained throughout the time. Store should be attractive enough in designing. He should see that the stock is available all the time in the store as this is the main retail outlet. A store manager should be aware of all the products because if any problem occurs about the description of the product, then the customer will ask the manager only. Quality assurance is also the responsibility of the store manager as he should see that there are no expired products as this may ruin stores image. The flagship store has been set up new. Previously, company use to sell through online and it was big success. The sell which use to take place through online can’t be compared to the retail store as it is new and it has not created brand name yet. Avai lability of the product can be an issue as it may happen that transportation of products from the factory to the store has not been fixed and so the product shortage takes place frequently. It may happen that products which are available online are not available in the store as transportation is again the issue. Proper precautions have to take regarding fabrics as it can be out of fashion and still lying in the store which affects the brand image. Quality of fabrics has to be maintained as it can get dirty or spoiled due to negligence. A store cannot keep all the stocks as it is available in online because online store purchasing doesn’t need storage, order is directly packaged from the factory itself but products in the outlet needs storage with proper maintenance. There are many flaws and effectiveness in the set up of main outlet which will be rectified slowly as this is time