Sediment transport

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

2012 to determine the physical aspects within the estuary beach system. This paper gives an overview of the factors affecting the slope of the estuary, sediment sizes and the tidal prisms. The beach slope was measured using the Emery board method and it was found to be characteristic of the KwaZulu-Natal coastline. Wave energy and sediment transport rates along the beach morphology are interlinked, high energy storms tend to erode and flatten beaches whilst lower energy waves tend to be responsible

As a child, the ocean charmed me. After glancing at the never ending shore line’s going from coast to coast as far as the eye can see, I felt like a grain of sand on the beach. I never thought I could see anything else as immense and alluring. As I relaxed on a lawn chair soaking up the rays of sunshine in Alabama, my friends froze in Iowa from the early stages of spring still bitter from the past winter. During my family vacation in Alabama many memories were cemented into my mind as I soaked up

from soil sample to cantena to catchment or watershed. The problem with this is that generalisations made at one level or scale does not always hold at other scales. Sampling can be done at the regional scale with sampling the sediment load at mouth of river to estimate catchment erosion. Scale and resolution are very important for dissertation research as they help monitor the environment via measuring cross sections with stratigraphic logging, this is not trying to control realist

e.g. shale, mudstone, any crystalline rock etc. and then erodes through that impermeable substrate the river could cease to exist. The substrate has a major effect on the river. The substrate can determine what type of river is formed, how much sediment the river is transporting, how much erosion is occurring in the river etc. The substrate is a very import factor when anyone is studying a

Investigate process and/ or landform(s) along a stretch of a coast Hypothesis ‘The transport of sediment affects the morphology of Newhaven beach and Castlehead cliff’ This investigation will be exploring whether the movement of pebbles, shingle, shells and other materials found on the beach have impacted on the shape and structure of Newhaven beach and Castlehead Cliff. One of the key processes this investigation will focus on is that of long shore drift caused by strong prevailing winds, prevailing

The sediments in the intertidal zone are predominantly composed of silt and clay that display substantial distribution in grain size distribution due to hydrodynamic and vegetation cover changes, such as grass, mangroves and other plantations. Sediment pH, total Corg (%) and percentages of sand, silt and clay obtained from the samples of 13 sampling stations are summarized in Table 2, whilst sediment pH was in a narrow alkaline range of 7.2 to 8.6. Similarly, Corg varied little from 0.47 to 0.91

synthesized from inorganic mercury (Hg II) by aquatic bacteria at oxic/anoxic boundaries such as sediment-water interface of lakes and rivers (Hurley JP, 1995). The degree to which an aquatic system is impacted by methylmercury contamination is a function of a number of factors, including the rate of supply of atmospherically derived Hg (II), the net rate of mercury methylation by aquatic, the efficiency of transport and

Introduction The 1960’s were considered the “golden age for dam construction” and contributed to thousands of dams being built across the United States. Dams are regualarly built to support recreational activities as well as hydroelectric power and water supply purposes but people recently have realized many of the negative impacts affiliated with them. Many are now 50 years old and due for relicensing which involves many tradeoffs for dam owners and public stakeholders to consider. Urbanization

factors and mechanism of fluvial dynamics of anabranching Baghmati river system. In their study they have observed that anabranching phenomena of Baghmati river only occurs along middle river course. The authors suggested that inability to transport high sediment load due to gentle channel slope and dominance of aggradation processes are responsible for anabranching of Baghmati river. Luchi et al. (2007) investigated small alpine river to monitor morphodynamics of channel. Their study reveals that