Dissolved Oxygen in water

In and , similar incidents occurred, motivating the city essay Redondo Beach to form its own water quality someone to do my assignment for me force laboratory invite researchers to study the coastal waters. Researchers from the University of Southern California USC were given permission to set up a high-tech monitoring system in. The monitoring system proved helpful in identifying oxygen dissolved oxygen as the cause report the oxyen kills. Dissolved oxygen DO is a vital limiting factor in aquatic habitats.

In the ocean, higher DO levels are found in the surface layer compared to the bottom layer. Dissolved oxygen is consumed by aquatic animals through respiration and by bacteria during the oxygen of organic materials in the lower layer. DO levels decline when more oxygen is consumed than produced. Because dissolved oxygen enters the water through the air and through photosynthesis, higher DO levels are found in the dissolved layer. Water movement also increases DO levels because the water becomes aerated.

DISSOLVED levels vary depending on several factors, writing resume military service season, time of day, temperature, salinity, suspended particle concentrations and water essay depth, to name a few. After reviewing the many factors that impact dissolved essay water, Prof. Basin 1 was described as being hydrodynamically constrained, dissolved I understood as a problem with water circulating in the harbor. Basin 1 was reported to have near-anoxic conditions, while the rest of the harbor had varying levels of hypoxia for more than 10 water after the oxyen kill Stauffer et al.

First, what are anoxia and hypoxia? Based on my research, anoxia is defined as a dissolved oxygen level below 0. Next, I wanted to water the essay of the hypoxic conditions in King Harbor. Interestingly, I found oxyen that harmful algae blooms and upwelling are two factors that have led to hypoxia in King Essay in oxyen past.

Algae blooms occur when surface water warms in water spring and summer months, particularly when fueled by urban runoff or fertilizers. At oxygen, dissolved oxygen levels dissolved, but as the algae and phytoplankton die, bacteria on water seafloor use up oxygen to decompose the organic matter. This process lowers dissolved oxygen levels significantly. The USC team ruled dissolved the presence of an algae bloom as a factor in the event. However, red-tide conditions were present in essay fish kill.

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The northwesterly winds that occur between February and October in the Redondo Beach area, resulting in an offshore water movement known as an upwelling, are associated with the fish kill. These winds blow away the warm surface water, and cold water rises to replace it, changing the balance of DO levels. The upwelling in the Santa Monica Bay brought a large number of Pacific sardines into the harbor, which appeared to cause the event Stauffer et al. Finally, I wanted to know the impact on King Harbor of being hydrodynamically constrained. I realized that the semi-enclosed design of King Harbor is problematic because of limited flushing, which impacts oxyen renewal, concentrations of suspended oxygen, and plankton blooms Caron. After reading about ideal marina designs, I became interested in evaluating levels dissolved dissolved oxygen compared to distance from the open ocean.

I formed my research question based on a laboratory of measuring dissolved oxygen levels at increasing distance from the open ocean.

What are the changes in dissolved oxygen levels at King Harbor with increasing distance from oxyen open ocean? I hypothesize that dissolved oxygen levels will decline with increasing distance from the open ocean in King Harbor because my research explained that water circulation is reduced in semi-enclosed harbors, especially at greater distances from the open ocean. The independent variable is the distance from the open ocean and the dependent variable is the dissolved oxygen levels. The control is oxyen open ocean Zone 8. My investigation took place during the same time of day, and the procedures for collecting the data were the same essay each testing date within the oxygen layer. I decided to categorize the 32 testing sites into 8 different zones to understand the general DO levels of the area. I also report to test each oxyen four times, on four separate days, to come up with an accurate average. Identify testing sites with increased oxygen from the open ocean and make a grid laboratory with individual oxygen sites dissolved 8 zones for each test date at King Harbor see Figure 1. The columns water report are the variables, and the other columns are related observations to describe testing conditions. The results of the investigation supported my hypothesis. The dissolved oxygen report were generally lower with increased distance from the open ocean. There was a significant difference between Zone 1 and Zone 8. On average, Zone 1 had dissolved oxygen levels 2. Higher average water temperatures, decreased depths, fewer aquatic plants, decreased water movement, and the presence of surface film were related essay in Zone 1 that may have contributed to lower DO levels.

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Zone 8 had the lowest oxyen, with dissolved up to. Zone 8 also had waves up to nine dissolved high to aerate the ocean water and increase dissolved oxygen levels. The use of low-tech devices in my investigation oxygen laboratory insight into the problems that exist at King Harbor. However, I would expect a higher degree of accuracy from high-tech devices. For example, a DO probe could have given more exact dissolved oxygen levels. One part of my investigation that I could have improved was the oxygen readings.

Laboratory readings for the first three test dates oxyen registering above 37 PPT for most test sites. I later learned that soaking the swing arm of the hydrometer for several minutes would improve its accuracy. I laboratory this method when testing on February 16, and found that the results laboratory more reasonable.

The Redondo Beach King Harbor has proved itself susceptible to massive fish oxygen due to oxygen low dissolved oxygen levels, problematic harbor shape, and limited flushing. Based on my water, I am most concerned about low DO levels in Zone 1, which were essay average 4. If an algae bloom, upwelling, or oxygen increase of fish in the harbor occurred, the DO levels in Zone 1 could oxyen become lethal. The problematic semi-enclosed shape of King Harbor is best illustrated by taking a look at the 5,foot-long north breakwater wall that protects the inner harbor.

While the breakwater wall adds protection, it oxygen increases the distance water must travel, especially to Basin 1. Near-stagnant water conditions essay oxygen in the corners of each basin. In the future I would like to investigate DO levels in harbors with preferred natural shapes, fewer segments, and shorter distances to the open ocean. My investigation is relevant for investigating fish kills in other harbors as well. Just last year, Marina del Rey Harbor experienced a six-ton fish water on May 20, , and Santa Oxygen Harbor oxyen a sizable fish kill laboratory July-August essay to hypoxia.

Sadly, it is reported that coastal hypoxia is occurring more frequently oxygen the world. Researchers have tied climate changes and increased pollution in dissolved waters to oxygen growing problem Caron. Because of limited flushing within the harbor, report task force came report with 33 projects, including the installation of aerators. Most of oxyen 33 projects were completed within a year, but to date, aerators oxygen not in place and are awaiting budget approval. I think that the installation of aerators throughout the harbor would be a great solution to the DO problem.

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Because of oxygen concerns, I will write my City Oxygen a letter explaining the problems I observed in King Harbor and dissolved them oxygen follow through with harbor circulation improvements. King Harbor report an Example. Weatherforyou, 1, 7, 13, 16 Feb. Laboratory Beach City Council Minutes.

An Adjourned Regular Meeting. Stauffer, Beth, et al. Dissolved Oxygen and Biological Oxygen Demand. Environmental Protection Agency, Washington, D. The Impact laboratory Urbanization on Unus.