The elevation of Davis is 15 meters above mean sea level (msl). Donner Summit at the Sierran crest is 2200 meters above msl. Blue Canyon, on Interstate 80, is 1430 meters above msl. Assume that precipitation increases linearly as elevation increases.
Question 2: (12 points)
Consider the following two redox reactions in the nitrogen cycle:
Both are currently unbalanced. Using the “half reactions method”, balance both of the equations, and be sure to show all of your work.
Question 3 (10 points)
Background: Energy balance and water balance on landscapes and in soils play an important role in determining the types of vegetation that occur, the amount of energy and water available for soil formation, and the amount of water available for aquifer recharge and stream runoff. Energy dissipation by evapotranspiration (evaporation from soil plus transpiration by plants) affects the amount of water that can be stored in soils. A water balances is dependent not only on the magnitude of precipitation (P) and evapotranspiration (ETp) but on the timing, or seasonality of precipitation and solar radiation. The water balance used here is sometimes called a “bucket model”. The soil is the bucket that can hold a maximum amount of water (water holding capacity, WHC). The bucket can be filled when P exceeds ETp, or emptied when ETp exceeds P. Storage can never be less than zero because the bucket is empty. Also, once the bucket is full, an excess of P over ETp produces a surplus (the bucket begins to empty out the BOTTOM, run off is not considered in this type of bucket model), that can contribute to leaching of soils, recharge of groundwater aquifers, and streamflow. Note that ETp refers to potential evapotranspiration, not actual evapotranspiration. Refer to chapter 9 in the text for more discussion of water balance.
Question 3, Part 1: Calculate the water balances below for Site 3 (4 points, all or nothing).
|Site 3||Water Holding Capacity 15|
Question 3, Part Two (4 points total):
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