Lesson 9 Assignment The assignment for lesson 9 is LESN 9 ESSAY 5N. Below are your essay questions: 1. Discuss three effects that urbanization (including flood control efforts) has on flooding. Describe the various types of flooding and how these urbanization features may alter the flooding events and resulting erosion and deposition. Three effects that urbanization including flood control efforts has on flooding are water being forced into smaller channels that creates floods, the ground is also less porous and less permeable than rural land, which forces the water to run off instead of filtering into the ground, and natural buffers are destroyed that all lead to flooding.
After the algae accumulate, it dies, decomposes and depletes the oxygen in the ocean creating a dead zone. Natural elements of climate, weather and change in wind circulation also cause changes in algae growth. In the spring months increased rain, water flow and sunshine increase this algae growth. In the fall tropical storms and hurricanes break up the algae and the cycle repeats again. The largest human cause of dead zones is nutrient run off from abundant use of fertilizers, animal waste and sewage.
Pesticides are used to kill unwanted pests, but are polluting the water with toxic chemicals that can have large halflifes, which means they stay in the water many years causing harm to plants and animals who depend on fresh water to survive. Storm drains carry unfiltered water into the bay, which can carry harmful substances like pesticides, oil, lawn trimmings, and trash. Many species of fish and wildlife, including endangered species, are declining in population. Water pollution is a serious problem that the state of California needs to address. Introduction Storm water runoff is unfiltered water which flows across impervious surfaces and goes into creeks, rivers, lakes, and the ocean (“Stormwater Runoff”, 2010).
As the reliable water sources shrank and they were forced to drink the contaminated water. This may have also spread diseases throughout the Colony. The results being more deaths, because of the water sources being contaminated by filth from the colonists. [Doc.B] Shows that there was a large time of drought from 1606-1612.This likely affected the growth of crops. The result was deaths most likely caused by lack of food.
Also refer to section 4 (discussion). Calcium phosphate is found in teeth and bones. Alum is used for the sedimentation tank in water treatment places because alum addition leads to flocculate the charged colloidal particles. For alum-precipitation, the aluminum phosphate from the wastewater would have bacteria and viruses. When phosphate from wastewater is used, the main problem is that there will be microbiological hazards so the plants and animals can be contaminated from that alum-precipitation.
That also harms plants. Bringing other plant species to their unnatural habitat is bad too because some of them do well in their new environments and endanger the plants that were there before (the native species). Plants are a necessity for us to survive therefore we
Pollution in seasonal wetlands Wetlands are considered habitats that help trap and reduce pollutants that come from all types of sources, such as oils from cars, chemicals from drainage runoff, sprinklers that have fertilizer runoff from nearby grass located around buildings, agriculture runoff, untreated sewage from pets and human waste, and in flow of domestic and industrial wastes. Other harmful chemicals that are human related are antibiotics from animal husbandry, pesticides that act as endocrine disrupters. (Ramsar 2008) These pollution sources all contribute to the negative health of wetlands all over California. Roseville wetlands are being inundated with water pollution from many of these human related sources around them. Wetlands can only handle so much of these pollutants, and with the major habitat loss that has completely changed the dynamics of these once seasonal wetlands, can only limit the ability for these wetlands to filter as much of the pollution as possible.
For example, when the air is polluted, rainfall will settle many pollutants on the ground, which can then seep into and contaminate the groundwater resources. Water extraction without proper recharge and leaching of pollutants from pesticides and fertilizers into the aquifers has polluted groundwater supplies. In addition, leachates from agriculture, industrial waste, and the municipal solid waste have also polluted surface and ground-water. Some 45 million people the world over are affected by water pollution marked by excess fluoride, arsenic, iron, or the ingress of salt water. [pic] Figure 1: Hot-Spot States of Groundwater Pollution in India The groundwater quality dimension is addressed by describing pollution sources, namely a) Anthropogenic Contaminants or Human impact on the environment includes impacts on biophysical environments, biodiversity and other resources.
Most of the factories built around the river excrete their waste in the river. People ceased using the river's water for laundering and ferry transportation declined. The river started to emanate offensive smells because people started dumping their waste in the River. Fishing in the river was prohibited by the government. By 1990’s, the Pasig River was considered biologically dead.