Human Activities Like Dam Construction - 1493 Words

Motivation and Objective Human activities like dam construction, dredging, and agricultures cause large amount of sediment transports in rivers, lakes, and estuaries. Erosion and sedimentation is a global issue that tends to be primarily associated with water quality. Pollution by sediment has two major types. For a physical dimension, erosion leads to excessive levels of turbidity in waters and the turbidity limits penetration of sunlight thereby prohibiting growth of algae and rooted aquatic plants. High levels of sedimentation lead to physical disruption of the hydraulic characteristics of the channel which have serious impacts on reduction in channel depth, and it can cause increased flooding. For a chemical dimension, the silt and clay fraction (62mm) is a primary carrier of adsorbed chemicals originated from agricultures like phosphorus, chlorinated pesticides and most metals transported into the aquatic system. The use of numerical hydrologic, hydraulic, and sediment transport models has greatly expanded to predict and interpret behavior of erosion and sediment runoff for controlling sediment pollutant and keeping water resources safe. Unfortunately, predictions from such models always contain uncertainty, and the overall uncertainty is poorly quantified and deterministic predictions have been used in most applications. Because those predictions are often used in situations that involve the potential for economic losses, ecological impacts, and risks to humanShow MoreRelatedAdvantages And Disadvantages Of Terraced Fields1309 Words   |  6 PagesTerraced fields have existed in many ancient human civilizations for thousands of years. They are ubiquitous; from the Incas to the Chinese, even in Europe, we see terraced fields developed and used for many purposes. Most terraced fields were constructed for agriculture, but some are developed to control floods and other purposes. To this day, we still see some terraced fields around the world, which allows us to admire their natural beauty. However, while we are admiring the beauty of terracedRead MoreCivil Engineering : An Interdisciplinary Field Essay1176 Words   |  5 Pageshas evolved throughout the semester Civil engineering is an interdisciplinary field that deals in the design, construction and maintenance of the natural and physically built environment (Wong p.213). It entails the constructions works for roads, canals, dams, bridges, buildings and other forms of man-made infrastructure. Civil works are executed to improve the living standards of human beings. Structures are designed to accommodate the needs and safety of the occupants. In civil engineering, detailedRead MoreThe Belo Monte Dam Complex Essays1170 Words   |  5 Pages Hydroelectric dams as energy sources have many advantages; they provide a renewable energy source, it can take the place of fossil fuel usages, and while being built dams can significantly help jobs in the development industry (Perlman). However, these dams are extremely costly, not just economically but environmentally and socially as well. These costs can be demonstrated by looking at the consequences of other dams. Three Gorges in China: rele ase of methane gases, deforestation, waterRead MoreHydro Electric Power1518 Words   |  7 Pagesit falls. Hydroelectric dams create height for the water to fall and provide storage. In general, the higher the dam, the more potential energy is available. Building up behind a high dam, water accumulates potential energy. The potential energy is then converted to kinetic energy where it can perform work to power a generator. Hydroelectric power can come in many forms, such as utilizing oceanic waves and currents, shoreline waves, and tidal energy. However, I would like to focus on utilizing freshRead MoreThe Construction Of A Dam And Its Impact On The Social, Political And Economic Life Of The Indigenous1740 Words   |  7 PagesThese articles discuss the construction of a dam’s project in Mapuche territories and its impact on the social, political and economic life of the indigenous community. The Mapuche people of Southern Chile have a long history and they were able to d efend their independence despite many raids by giving many sacrifices. But a final defeat their on the hands of Chilean army forced them to be at the mercy of Chile’s government and then began a long and different fight for survival. They were forcefullyRead MoreWhy Is Beaver Activity Is A Public Nuisance Or Beneficial Ecological Restoration?1749 Words   |  7 PagesBeavers, as ecosystem engineers, can reshape the geomorphology, hydrology, and biotic composition of a channel through their activities. By doing so, beavers increase habitat heterogeneity plus species diversity at the landscape scale. Sometimes a beaver’s activity will disturb humans and cause them to question the benefits of beavers. The question of whether beaver activity is a public nuisance or beneficial ecological restoration has much to do with people’s understanding of beavers. The abundantRead MoreCauses of Deforestation Essay889 Words   |  4 Pages Humans have always cleared the fore st for our own interests, but in the past, the process was slow and only limited regions were deforested, generally for subsistence agriculture. However, today, humanity is far more efficient at clearing the forest with our advanced technology and machinery and our almost maniacal drive to earn profits in the near term. Ranching Cattle ranches are created in the rainforest for many fast food companies. Large areas of rainforestsRead MoreCritical Study of Animal Attacks and Government Policy1273 Words   |  5 Pagesa rest for few days in the jungles or in remote area from the chaotic and tensed urban life. That clearly shows human being has fond of development as well as environment. Over to the time this fact is accepted that sustainable development and protection of environment are two side of one coin. Recent incidents shows that supporters of both the side are conflicting with each other like these are enemies of each other’s. Recent statistics from Maharashtra shows that compensation amount which is givenRead MoreThe Feasibility of Different Techniques for Providing Fresh Water to Arid Regions in the World1348 Words   |  6 Pagesdifferent techniques for providing fresh water to arid regions in the world 1.0 Introduction Water is the most valuable and indispensable resource for all forms of life. People need it for every activity: domestic use, agriculture and industry. Access to fresh water is regarded as a universal human right (United Nations Committee in Economics, Social and Cultural Rights, 2003). Drought has become an increasingly important problem in many parts of the world. Water scarcity is most common in aridRead MoreDeforestation And Its Effects On The Environment1616 Words   |  7 PagesBackground Webster dictionary defines deforestation as the action or process of clearing of forests. It occurs when humans desire to make use of land covered by forest for other purposes. This clearing of tree is concerning due to the fact that trees are being cut down at a rate much greater then they can grow back. This is called overshot, and can have a devastating impact on the environment. There is an estimated loss of 18 million acres of forest each year. That is roughly equivalent to the size