HEC-HMS Evaluation

HEC-HMS Evaluation HEC-HMS is a hydrological model that can be used to check the effect of a storm based event on a watershed or a continuous simulation. HEC-HMS is distributed model but it deals with a watershed as a conceptual model which consist of sub-basin and reach. HEC-HMS is very powerful as it has many options for hydrological calculations and a user-defined is one of the options. One of the uses of the HEC-HMS is to predict the future urbanization that can happen in a watershed and the corresponding flood that could happen. HEC-HMS alone cannot get the places of the flooded area but the hydrograph extracted from the HEC-HMS can be used in HEC-RAS and RAS-mapper to get the inundated map of the city due to a certain storm event. In this lab, a simple simulation will be used to simulate the hydrograph of Tifton watershed.   In order to build a HEC-HMS project, there are components should be added first. The main components that the HEC-HMS require is the basin component which contains the basin properties such as sub-basins, reaches and junctions, the metrological component which contains the rain gages that will be used for precipitation, the control component which contains the simulation time period and the time series component which contains any time series data such as the hyetograph or hydrograph. HEC-HMS has four main windows which are the component window, view window, editor window and message log window. The component window contains all the created components so that we can toggle between them. In order to edit any of the components chosen from the component window, the editor window is used and it contains tab but for global data entry or edit the component menu is used. The view window shows the selected basin, result or table. The log message shows if there is error or the model has found no problem as for example as shown in Figure 1 the log message says, Note 10008: Finish opening projectà ¢Ã¢â€š ¬Ã‚ ¦. Which means that the project was opened successfully with no errors found. Figure 1 Log message of HEC-HMS Basin component As mention before that the HEC-HMS is conceptualizing the watershed, so we will import the watershed image as a background as shown in Figure 2 and draw on it the corresponding component. This is a simple watershed that contains only one sub-basin and one outlet. the sub-basin is named 74006 and the outlet is junction in HEC-HMS and there is no reach used for flow channel routing. Figure 2 HEC-HMS desktop view The sub-basin properties should be entered for HEC-HMS to use in calculations. The main property is the catchment area as the HEC-HMS is using all the catchment symbolled in one point (sub-basin 74006). The other properties that should be entered are the hydrological calculations that the HEC-HMS will use to calculate the hydrograph at the outlet of the sub-basin as shown in Figure 3. Figure 3 Sub-Basin hydrological calculation methods Canopy is the method used to calculate the water intercepted on the tree that avoid the water to reach the ground. The percentage of vegetation obtained from remote sensing is used to determine the canopy. In this lab, simple canopy method is used which need only the initial water storage in the tree and the maximum storage that the plant can hold. In order to indicate the surface storage that can happen in the watershed there are different methods, in this lab a simple surface is used. The simple surface method is mainly saying how much is the initial storage and the maximum storage. The maximum storage provide in this lab is zero which is useless as the surface method can be selected as none instead. To get the parameters of the initial storage and maximum storage a site investigation can be done or throughout satellite maps and DEM the surface depletions and storage area can be calculated roughly. Infiltration losses is indicated here as the loss method. The loss method that is widely used is the Horton equation but in this lab the soil moisture loss is used. The soil moisture loss method mainly works as the soil moisture content and the maximum infiltration rate of the vadous zone of the soil as well as the groundwater beneath the vadous zone depth and the percolation rate from vadous zone to the groundwater and if the groundwater is into two different soil type provide the data to each soil type. In order to get the data for this method a soil surveying is required or from a previous defined data as the FAO maps or Canada CIRUS maps. The unit hydrograph for the basin is not known so a synthetic hydrograph will be used. There are different synthetic hydrograph methods in HEC-HMS, in this lab Clark (1945) Hydrograph is used. The Clark Unit Hydrograph is divided into translation based on synthetic time area curve and time of concentration as well as a reduction of discharge as excess rainfall is stored in watershed. Clark Unit Hydrograph is modeled with linear reservoir for baseflow. The parameters for the Clark Unit Hydrograph is the time of concentration and the storage coefficient. Time of concentration can be calculated using watershed properties or from previous observations but the storage coefficient most likely will be calibrated. The linear reservoir is used for baseflow separation. Baseflow is linearly related to average storage of each time interval similar to the Clark unit Hydrograph. The linear reservoir also is used with the soil moisture content as it depends of the water in the groundwater and how it returns back to be a contributed to the hydrograph as a baseflow. The parameters of the baseflow is hard to measure so it will be most likely calibrated. Time series component In the time series component, a rainfall hyetograph is entered in the rain gages using the Tifton DSS file provided with the project. After entering the hyetograph, the graph can be shown as shown in Figure 4. The hyetograph will then be assigned to the basin in the metrological compenent. Figure 4 Tifton Hyetograph In the time series component, also the observed outflow hydrograph of the catchment is entered using the Tifton DSS file. After entering the DSS file the hydrograph is shown as in Figure 5. The hydrograph should be used for model calibration of the unknown parameters. Figure 5 Tifton observed hydrograph Meteorological component In the meteorological component, the hyetograph is assigned to the sub-basin and if there are more than one rain fall gage a weighted average can be assigned to each sub-basin. Also in the meteorological component, the evapotranspiration is entered. In this lab, monthly average is used which gives a constant value for each month and corresponding coefficient. Control component Finally, the control component is used to define the simulation period and time interval. In the lab, according to my group number which is 15 the corresponding simulation time is used which is from the first of January 1970 to the thirties of June 1970. After finishing all the data entry, a simulation manager is used to create a simulation which is defined by selecting the basin, meteorological and control data to be computed. After creating the simulation, compute is chosen and a message of successful appear in the message log -if there is any error or warning will appear in the message log too-. From the results tab, a global summary can be viewed as shown in Figure 6. The global summary gives the drainage area contributing to each sub-basin and each junction and the time to peak and the corresponding peak discharge as well as the total volume of excess rainfall. In this lab, there is only one sub-basin so the sub-basin and junction will have the same properties. The peak discharge is 873 CFS and happened in the thirty-first of March 1970 at 1:00 PM. The total excess volume is 16.36 in. Figure 6 Global Summary The graph of the sub-basin 74006 shown in Figure 7 show the hyetograph in the top part which consists of red and blue. The red part shows the infiltrated depth while the blue line shows the excess rainfall depth. The bottom part of the graph shows the hydrograph which consists of the baseflow and the excess hydrograph. The blue solid line shows the hydrograph while the dotted red line shows the baseflow. As we can see that in January all the rainfall is almost infiltrated and there is no excess and that is reflected in the hydrograph as there is no excess hydrograph only baseflow. The peak rainfall events happened at the end of March and May and as we can see that there is a lag time between the peak of the hyetograph and the hydrograph which represent the time of the water to route though the watershed to the outlet of the catchment. Even both event in March and May has the same rainfall but the peak was higher in March due to the infiltration difference. The infiltiration that happ ened in May was larger than March as the soil moisture content in March was high due to event happened just before the peak event while before May peak event it was dry for almost two months. Figure 7 Hyetograph/Hydrograph of Sub-basin 74006 The hydrograph of the junction shown in Figure 7 shows the hydrograph coming from each sub-basin the blue dashed line and the total summation of all the hydrographs at the junction the blue line and the observed data the black dotted line. The dashed blue line and the solid blue line are coinciding because there is only on sub-basin that contribute to the junction. As shown in Figure 7, the observation and the hydrograph at the junction as almost the same which means that the parameters and methods used in the HEC-HMS are representing the reality quite well. Figure 8 Hydrograph of Junction HEC-HMS can simulate storm event to get the flow hydrograph of the catchment. It is important to use the adequate method based on the data availability. The model should be calibrated using the observed data. HEC-HMS can gives how each sub-basin can contribute to the basin outflow and what changes will happen if any of the sub-basin changes. Hydrologic Engineering Center (2010). Hydrologic Modeling System HEC-HMS, Quick Start Guide, US Army Corps of Engineers, Davis, USA

Brenda C. Seggerman Essay

hemoperitoneum was noted, and approximately 500 mL of blood was rapidly evacuated from the pelvic cavity, as were large clots. Following this, the bowel was packed away from the pelvic area with packing laps. A retaining retractor was introduced. The left fallopian tube was noted. A large tubal ectopic pregnancy was noted, affecting approximately the distal half of the fallopian tube. Following this, a Heaney clamp was placed in the mesosalpinx and another curved Heaney clamp was placed in the proximal aspect of the left fallopian tube beyond the area of the ectopic pregnancy. A partial salpingectomy was then performed, removing the portion of the left fallopian tube containing the ectopic pregnancy. Heaney clamps were then replaced with sutures of No. 1 Vicryl. Hemostasis was checked again, and no bleeding was detected. Further evacuation of blood and blood clots was then performed. The right fallopian tube was noted to be covered with adhesions, both tubo-ovarian and tubo-uterine adhesions. The adhesions were then sharply lysed, freeing the right fallopian tube. Hemostasis was checked again. No bleeding was detected. Mild serosal abrasion was noted from the area where the ectopic pregnancy was apparently attached to the bowel. This was not bleeding and was very superficial. Hemostasis was checked, and no bleeding was detected. The peritoneum was then closed continuously with 0 chromic suture. The fascia was approximated with interrupted figure-of-8 stitches of 0 Vicryl, and the skin was approximated with the staple gun. OPERATIVE REPORT Patient Name: Brenda C. Seggerman Patient ID: 903321 Date of Surgery: 03/27/—- Page 3 The patient tolerated the procedure well and left the operating room in satisfactory condition. All counts were correct. Blood loss was estimated at 1000 mL, which was replaced with 2 units of whole blood while in recovery. ________________________ Rosemary Bumbak, MD Obstetrics & Gynecology RB:xx(your initials in lower case) D:03/27/—- T:03/27/—-

Columbine High School massacre, Essay

A video game is an electronic game that involves human interaction with a user interface to generate visual feedback on a video device. Video games typically use additional means of providing interactivity and information to the player. Audio is almost universal, using sound reproduction devices, such as speakers and headphones. Other feedback may come via haptic peripherals, such as vibration or force feedback, with vibration sometimes used to simulate force feedback. In the early days of cartridge consoles; they were sometimes called TV games. It has been shown that action video game players have better hand-eye coordination and visuo-motor skills, such as their resistance to distraction, their sensitivity to information in the peripheral vision and their ability to count briefly presented objects, than nonplayers. Researchers found that such enhanced abilities could be acquired by training with action games, involving challenges that switch attention between different locations, but not with games requiring concentration on single objects. It has been suggested by a few studies that online/offline video gaming can be used as a therapeutic tool in the treatment of different mental health concerns. In Steven Johnson’s book, Everything Bad Is Good for You, he argues that video games in fact demand far more from a player than traditional games like Monopoly. To experience the game, the player must first determine the objectives, as well as how to complete them. They must then learn the game controls and how the human-machine interface works, including menus and HUDs. Beyond such skills, which after some time become quite fundamental and are taken for granted by many gamers, video games are based upon the player navigating a highly complex system with many variables. Learning principles found in video games have been identified as possible techniques with which to reform the U. S. education system. It has been noticed that gamers adopt an attitude while playing that is of such high concentration, they do not realize they are learning, and that if the same attitude could be adopted at school, education would enjoy significant benefits. Students are found to be â€Å"learning by doing† while playing video games while fostering creative thinking. Video game development and authorship, much like any other form of entertainment, is frequently a cross-disciplinary field. Video game developers, as employees within this industry are commonly referred, primarily include programmers and graphic designers. Over the years this has expanded to include almost every type of skill that one might see prevalent in the creation of any movie or television program, including sound designers, musicians, and other technicians; as well as skills that are specific to video games, such as the game. All of these are managed by producers. 97% of 12-17 year olds in the US played video games in 2008, thus fueling an $11. 7 billion domestic video game industry. In 2008, 10 of the top 20 best-selling video games in the US contained violence. Violent video games have been blamed for school shootings, increases in bullying, and violence towards women. Critics argue that these games desensitize players to violence, reward players for simulating violence, and teach children that violence is an acceptable way to resolve conflicts. Video game advocates contend that a majority of the research on the topic is deeply flawed and that no causal relationship has been found between video games and social violence. They argue that violent video games may reduce violence by serving as a substitute for rough and tumble play and by providing a safe outlet for aggressive and angry feelings. The controversy over violent video games resurfaced following the massacre of 13 people at Columbine High School in Jefferson County, CO on Apr. 20, 1999. The two teenage shooters were revealed to be avid players of weapon-based combat games Wolfenstein 3D and Doom. Following the shooting, 176 newspaper articles across the country focused on the allegation that video games were the cause of the tragedy. On Oct. 7, 2005, California passed a law that required violent video games to include an â€Å"18† label and criminalized the sale of these games to minors. The law was blocked by the US District Court for the Northern District of California and was struck down in Feb. 2009 by the 9th US Circuit Court of Appeals citing First Amendment protections and the inability of the state to demonstrate a link between violence in video games and real-world violence. As of Dec. 2008, six other state statutes and two city ordinances concerning the sale of violent video games to minors have been stricken down on similar grounds. On June 27, 2011, the US Supreme Court ruled 7-2 in Brown vs. Entertainment Merchants Association that the California law banning the sale of violent video games to minors violated free speech rights. In the majority opinion, Justice Antonin Scalia wrote, â€Å"A state possesses legitimate power to protect children from harm†¦ but that does not include a free-floating power to restrict the ideas to which children may be exposed. † Several games have garnered significant media attention, including 2004’s JFK assassination reenactment JFK Reloaded, 2005’s Columbine shooting reenactment Super Columbine Massacre RPG! , and 2006’s Rape Lay, a Japanese video game where the player stalks and rapes a mother and her two daughters. Prior to the release of Call of Duty: Modern Warfare 2, which went on to gross $550 million in the first five days after its Nov. 10, 2009 release, leaked footage of the game stirred enough controversy that publisher Activision issued a response defending the game’s violent imagery. Some cons to the question â€Å"Does Video Games promote violence are the following: Violent juvenile crime in the United States has been declining as violent video game popularity has increased. The arrest rate for juvenile murders has fallen 71. 9% between 1995 and 2008. The arrest rate for all juvenile violent crimes has declined 49. 3%. In this same period, video game sales have more than quadrupled. Another con would be violent video games provide healthy and safe opportunities for children to virtually explore rules and consequences of violent actions. Violent games also allow youth to experiment with issues such as war, violence and death without real world consequences. In conclusion I have learned throughout this research that video games in fact do have a major impact on young adolescents in today’s time whether it’s positive or negative. I’ve also realized that for one some kids may act out because of theses sometime violent games and that for two they may improve in their behavior by these games as well. There isn’t really a yes or no answer to this research topic ,but maybe parents should just get games more appropriate for their child’s age . Work Cited â€Å"Video Games ProCon. org. † ProConorg Headlines. N. p. , n. d. Web. 12 Nov. 2013. â€Å"Video Game. † Wikipedia. Wikimedia Foundation, 11 Dec. 2013. Web. 12 Nov. 2013. â€Å"Children and Video Games: Playing with Violence. † Children and Video Games: Playing with Violence. N. p. , n. d. Web. 12 Nov. 2013.

Inca Empire Demise essays

Inca Empire Demise essays At its height, the Inca empire stretched from modern day Colombia to central Chile, and had about nine to ten million inhabitants, yet in 1532 Francisco Pizarro and a meager 62 horsemen and 102 foot soldiers conquered the empire. Pizarro was able to conquer the Incas not only because of his cunning and ruthlessness, but also because their kingdom was in disarray, therefore, I will discuss what I believe are the three main reasons why the empire fell, and none of them will have anything to do with Francisco Pizarro. My first explanation for the demise of the Incas is their rapid and recent expansion they had gone through only a few decades before Pizarro arrived. Circa 1438 AD Inca Yupanqui (Pachacutec) defeated the Chancas and expanded his empire out of the Cuzco valley. Around 1463 AD, while Inca Yupanqui was busy organizing his conquests and remaking Cuzco, the capital of his empire, his son, Topa Inca, was allowed to take control of the Inca army and continue the task of conquest. During that time, Topa Inca conquered the Northern Highlands of Peru, the Southern and Central Highlands of Ecuador, and then the Northern and Central Coastal areas of Peru. When Inca Yupanqui died around 1471 AD, and Topa Inca became Sapa Inca and took over the empire. During Sapa Incas rule, the empire virtually doubled in size, with the conquest of the lands of the Southern Coast of Peru, the northern half of Chile, Northwest Argentina, and Eastern Bolivia. This was done less than sixty years before Piz arro marched into Cajamarca (Davies 125-129). The successor to Sapa Inca was his son Huayna Capac in 1493 AD. When Topa Inca died ca. 1493 AD, he was succeeded by his son Huayna Capac. The empire had expanded rapidly to absorb millions of people spread over thousands of miles of land, and Huayna Capac had to concentrate much of his effort on quelling various rebellions in the north and defending the large border. Thus, when Huay...

Tribal Lands essays

Tribal Lands essays The legacy of Native Americans is one of the most important heritages of American history and culture. Native Americans have traditionally had a land-based culture. Their land is their prime resource and fulfills a further objective of promoting their heritage and culture. Therefore, the importance of conserving the sites of traditional value for these tribes is of utmost importance. By protecting these sites, one can conserve the cultural, spiritual as well as the economical status of the Native However, though the importance of land conservation cannot be denied, it is ironic that the history of the American Indian shows massive loss of The Dawes Act, implemented in 1887 resulted in a loss of more than 90 million acres of tribal land which in itself is no small figure accounting for a large percentage of the total tribal land. Even now, there is consistent looting of Indian land be it in the form of privately owned sites, graveyards, fishing grounds or wildlife habitat. The constant occupation of native tribal land is a persistent problem being faced by the Native American tribes like the Nez Perce, Umatilla, Warm Springs, Yakama and Klamath have all lost some part of their original land. They have however fought for it, with the help of land conservation organizations and other non-governmental workers. Their logic behind the fight against illegal occupation of tribal land is to save the land and build native economies which are socially, culturally and economically strong and devoted to strengthening the Native American status as well as preserving their traditional heritage. May our Creator send the spirits of those who have traveled these valleys and ridges, those who were laid to rest at the Big Hole, the Bears Paw and other places on the route of the Nez Perce W ...

Gaonic Society and Culture Research Paper Example | Topics and Well Written Essays - 5500 words

Gaonic Society and Culture - Research Paper Example The first â€Å"Gaon of Sura† was Mar Rab who took the charge in 609 and the last was Samuel ben Hofni who died in 1034. The last â€Å"Gaon of Pumbedita† was Hezekiah Gaon who was agonized and he died in 10401. During the â€Å"Golden Age† of Arabs Jews were prominent in the society and their religious and cultural practices and economic living flourished. After 681, the Jews were severely victimized by â€Å"Christian Visigoths† and therefore they invited the Muslim Arabs mainly the â€Å"Berber† conquerors. These conquerors successfully removed the â€Å"Christian Visigoths† and brought an end to their tyranny, providing the Jews their religious autonomy2. Thereafter a period of tolerance began as Jews devoted themselves in studying the sciences, commerce and industry to augment the prosperity of the country. They engaged themselves in translating Arabic texts into Roman and Greek and Hebrew texts into Arabic. The involvement of the Jews w as also found in several other disciplines such as â€Å"botany, geography, medicine, mathematics, poetry and philosophy.3† During this time Jewish ideas blossomed leading to partial Jewish autonomy. Again insecurity of the Jews developed around 976 and the situation further deteriorated in 1090 with the attack of â€Å"Almoravids†, a Muslim protestant sect from Morocco. Under their rule Islamic belief was imposed on the Jews. The famous educational bodies of the Jews were closed. Then by 1085 there was invasion by the Christian forces. Jewish community was still prominent. Some scholars such as Maimonides, born in 1135, were well-known figures in Judaism. Jewish existence still continued until they were powerfully debarred or converted by the â€Å"Christian Monarchs†4 The purpose of this paper is to show that the uniqueness of the gaons could be attributed to their piety and practices apart from their scholarly talents and achievements which reflect discipline , integrity and wisdom. The Gaons, their practice and religion During the Islamic period, due to the absence of corporate groups, the commercialized and crafted guild of the European variety was not restricted to those members having majority belief in Islamic culture. There was significant resemblance among the Muslim and Jewish practices. This encouraged flexible interactions between the Jews and Muslims in economic activities and led the Jewish to adopt liberal attitude towards the Muslims. They preferred to in developing business contracts and settling disputes in the Muslim religious courts as opposed to early Talmudic prohibition. According to one of the Babylonian Geonim this practice was implicitly recognized by the Jewish judiciary on account of mutual faith. â€Å"Ashkenazic rabbis† persisted on stringent observance of Talmudic controls. Therefore the Geonim and later halakhic authorities in the â€Å"medieval Arab world† objected on Jews relevance to Muslim courts and emphasized on continual Talmudic ban. The Gaon after considering many contradictory biblical verses exhibits that they do not include abrogation. Islamic religious expressions were used in â€Å"Judaeo- Arabic† writing of the Jewish scholars. Saadya Gaon, the first great â€Å"rabbinic† who wrote in Arabic referred deliberately to the â€Å"Torah†. His Arabic translation of the Bible reflected an integration of â€Å"Arabic-Islamic† culture. The considerable resemblance between the Jewish and Islamic law, the corresponding operation of both of their legal systems and their sharing of linguistic discourse across

Independent Creative Writing Essay Example | Topics and Well Written Essays - 500 words

Independent Creative Writing - Essay Example I have created my time capsule keeping this fact in mind. It would be difficult to write about the culturally diverse American society and for this reason, a DVD should be made that would record the different aspects of the American society. These different aspects would be personal, business and recreational society. For this purpose, the video recorder will have to visit different homes, business centers including the White House and popular recreational spots including fast food joints such as McDonald’s. This DVD would be the main object of the time capsule. To ensure that the DVD is playable, a DVD player would also be included in the time capsule. Along with the DVD, an album of pictures will also be put in the time capsule. This album will have pictures of popular spots that are idolized by the society including Hollywood, fast food joints, stadiums, and theaters etc. The composition of the pictures would be such that the essence of the place is captured, that is, stadium during a football match. I would also include a recent newspaper. This newspaper will cover most aspects of the contemporary American society including the most recent headlines and the opinions of leading journalists on the pressing problems of today’s society.