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FIVE SALT LAKE QUESTIONS 

1.	QUESTION ONE 

Following is the box model for the Great Salt Lake:

2. QUESTION TWO
Area of GSL= 2588km^2 
Annual inflow to GSL= 3582300 per year
Annual precipitation= 12.5m/year
Net inflow=inflow by rivers + precipitation = 3582300 per year 
Equilibrium condition = sum of inflows – sum of outflows= change in storage
Change in storage= change in elevation *area
Outflows = inflow-change in storage
=358-232
126mm^3 /year
Great Salt Lake is largest salt water lake of the world having 4400km2 in area. The input of water in Great Salt lakes by means of 
•	Precipitation 

•	Surface runoff by means of river and other flow from land
•	 subsurface runoff by the movement of groundwater 
Output of water in great lakes
•	Evaporation 
If the input of water is greater than the output of water then water level of great salt lakes will be increase and if the input of water in great salt lakes in less than the output means evaporation is greater than the precipitation then there will be decrease in the lake water level.

3. QUESTION THREE

Evaporation +precipitation = 12.5m/year
Stays same, find new overflow?

a)	 river flow + precipitation*surface area = evaporation *surface area

	River flow+ precipitation*S.A= Evaporation*SA

Rin=evap*SA-preci*SA

Rin= S.A (evapo-precp)

Net inflow =352300 area feet/yr
Total inflow=126mm^3 /yr

Total outflow=126 mm^3 /yr

Using formula we have river inflow+precipitation*surface area= evaporation *surface area

Rin+12.5in/yr*2588m^2 = evaporation * 2588

Total outflows=outflow+evaporation
Evaporation =6.6*10^10 
Rin=2.5 *10^9 (0.6-0.318/yr)

Rin =200m^3 /yr

B).
 (new/old)*100

(200/126)*100

4. QUESTION FOUR
 Inflow=200m^3 /yr

Precipitation =0.318m^3 

Evaporation?

Riverflow + precipitation*surface area

Rm= (evaporation-precipitation)*S.A

Evaporation =Rin/S.A+prcipitation

Evaporation =200/2.5*10^-1 +0.318

Evaporation =0.68m^3 

B). (New/old)*100

(0.68/0.4)*100

=15%

5. QUESTION FIVE

High water temperatures may reduce the abundance of fish in lakes by reducing water quality, longer dry seasons. The most important factors affecting lakes and underwater life in lakes is floods and drought. In this case therefore floods and droughts result in increasing seasonal and annual variability in precipitation. Further, climate change is already affecting plants and animals that live in the lakes. Thus climate warming may improve the conditions of lakes.

The total surface area of Utah lakes is 2588km^2. Steady state condition is characterized by the where evaporation from lake and sum of precipitation and surface and subsurface runoff is in equilibrium condition. In steady condition input of water is equal to the output of the water. The total inflow of water in Great Salt lakes is 126M m^3/year and total output from Great Salt Lake is 126M m^3/year.