Physical Hydrology Homework 6

Due 4/12

Hydrograph Analysis

1.   Save this data in the attached Excel file to your hard disk. The data  is from a small (2.2 km²) basin in northern Alaska that is completely underlain by permafrost. Thus, subsurface storage capacity is low. The streamflow data is hourly data in cubic meters per second. The precipitation is hourly totals in mm.

a. Plot the entire hydrograph and hyetograph on the same plot.

b. Perform a quantitiative analysis on the hyetograph-hydrograph by determining the following variables:

1. Precipitation magnitude, duration, and intensity during the storm.

2. Weff/W (you must first separate event flow from baseflow).

3. Each variable illustrated in the figure below.

4. Speculate how a small watershed with similar topography, but sandy, unfrozen soil might respond to a similar water input event.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. This excel file contains hydrograph data along with the concentrations of a conservative tracer.
    a. Calculate the total proportions of new and old water contributing to the hydrograph.
    b. Plot the total, new water, and old water hydrographs.
    c.