Solutions
KM#1: StreamFlow for the Animas River (Level 1)
Mathematical Content: Area, Volume, Unit Conversion
Solutions: KM #1 Annual Animas Streamflow (Level 1)
Question 1: What is the area of the watershed in square feet? Area in square feet:
Question 2: Convert the annual amount of precipitation from inches to feet.
Annual precipitation in ft: 
Question 3: Find the total volume (in cubic feet—use your answers to #1 and 2) of water from rain and snow that falls on the watershed each year.
Volume of precipitation over the watershed: 
Question 4: Only 74% of the rain actually reaches the river bed to contribute to its stream flow. What is the annual stream flow for the Animas River?
74% of precipitation: 
Question 5: On the average, how much water flows down the river each month? Each second? (1 year = 365.2 days, 1 day = 24 hours, 1 hour = 60 minutes, and 1 minute = 60 seconds)
Monthly average: 
Rate per second:
(cfs means cubic ft per second)