CIV E 445 - APPLIED HYDROLOGY
SPRING 2014
LAB No. 1 SOLUTION

  1. The mean annual discharge is 176,177 m3/s, obtained from Station Obidos 3629000 data.

    The mean annual precipitation is obtained from this chart. The value extrapolated to 2014 is 195 mm/month, i.e., 2,340 mm/yr.

    The total runoff is:

    Q = 176,177 m3/s × 86,400 s/d × 365 d/yr = 5.555917872 × 1012 m3/yr

    The total precipitation volume is:

    P = 4,640,300 km2 × (1000 m/km)2 × 2.340 m/yr = 1.0858302 × 1013 m3/yr

    The yield is:

    Q / P = 0.5116 ≅ 0.51.

  2. The source of the Amazon River is at Mount Mismi, in Southern Peru.


    From Google Earth, we find the coordinates of the source of the Amazon river at Mount Mismi, in Arequipa Peru: 15° 31' 27.62" S 71° 41' 21.26" W, at elevation 5,547 m.



    Peak of Mount Mismi, Arequipa, Peru.