2.) CLIMATE AND WATER USGS USGS 01104200 CHARLES RIVER AT WELLESLEY, MA Jan 81 F
ID: 299540 • Letter: 2
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2.) CLIMATE AND WATER USGS USGS 01104200 CHARLES RIVER AT WELLESLEY, MA Jan 81 Feb 8inar 81 Rpr BiHay 81 Jun 01 al 81Aug 81 Sep 010ct 01 Nov 81 2017 2817 2017 2017 2817 2017 2017 2017 2017 2917 2017 Provisional Data Subject to Revision Discharge Estinated discharge USGS USGS 01105585 TOWN BROOK AT QUINCY, MA 400.00 300.00 208.80 189.88 18.60 1.e0 Jan 01 Feb 0Nar 01Apr 01may 01Jun 01 Jul 01AuE 01 Sep 010ct 03. Nov 01 2017 2017 2017 2017 2017 2817 2817 2817 2017 2817 2017 Provisional Data Subject to Revision Diecharge Estinated discharge a.) There is a US Geological Survey (USGS) flow gauge located at the Charles River at Wellesley. This measures discharge Describe the data for 2017. (2 points) b.) There is another US Geological Survey (USGS) flow gauge located at Town Brook. Please describe the data for 2017. (2 points) c.) What is different between these two hydrographs for 2017? What is the same between the two hydrographs for 2017? (3 points) d.) Which one of these two watersheds appears to be more impermeable? What does this mean for the likelihood of flooding? Why? (3 points)Explanation / Answer
a. Charles River at Wellesley is having a maximum discharge of more than 850 cubic feet per second in the month of April whereas the minimum discharge is recorded in the month of November of about 8 cubic feet per second, whereas the river is discharging 400 cubic feet per second of water in the months of February, May, June and November.
b. Town Brook is discharging a maximum of 300 cubic feet per second in the month of July minimum in the month of November of about 0.75 cubic feet per second. Whereas for the remaining month it’s discharging water in between 10- 100 cubic feet per second.
c. The difference lies on the scale that is being used for this two hydrographs in the Charles river normal scale is being used whereas on the Town Brook logarithmic scale is being used to depict the discharge and the similarity lies with the purpose both of the graphs depicts the amount of water being discharged for the whole year.
d. After studying both the graphs Charles appears to be more impermeable as more the amount of water is being discharged from it, moreover it’s more likelihood of flooding as it seems that bedrocks are more impermeable which will not allow the water to percolate down the ground and it’ll hold it for longer duration resulting in destructive food.
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