Report Essay Example | Topics and Well Written Essays - 1250 words - 11

Report - Essay Example wending duck is a side channel of the river Wensum in the United Kingdom, and the water comes from Chalk rocks. there is also east Dereham treatment works next to it. East Dereham treatment works releases water straight into wending duck (see figure 1).(booklet). 2-Biological sampling: by measuring the macroinvertebrate animal community over a period of time, and with this method water quality is assessed by two measurements: 1) Biological Monitoring Working Party (BMWP); this method measure the biological quality of the river using a different type of macroinvertebrates as indicators. (booklet). The principle of this method is different macroinvertebrate have different potential of pollution. http://en.wikipedia.org/wiki/Biological_monitoring_working_party. Tertiary treatment: this is the final step, ultra violet and a thin membrane are used to remove bacteria and virus from the treatment process, and this water made for another purpose than drinking such as washing clothes,irrigation and toilets.(https://learn.uea.ac.uk/bbcswebdav/pid-1226628-dt-content-rid-1544301_1/courses/INTO-PSE-JUN14_E/wastewater-web--2-.pdf). By using a measurement tape across the River to find out the width of the river that has been divided into four sections. After dividing the river, a meter stick was used to find out the depth of the river in each section. All of the results were recorded in the results section. Dissolved oxygen and temperature were measured by oxygen meter "Do2 meter." A rope of 5 meters was placed on the surface of the river to calculate the velocity of the stream. A stick was thrown into the river from the beginning of the 5 meters rope while the stopwatch was turned on to calculate the time when the stick was traveling next to the rope till the end of the 5 meters rope. This method have been done twice We used benthic kick sample to measure