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Evaporation in Texas CE 394K.2 Spring 2007. Evaporation In Texas  Evaporation is an important component of the hydrological cycle.  Globally volumes.

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Presentation on theme: "Evaporation in Texas CE 394K.2 Spring 2007. Evaporation In Texas  Evaporation is an important component of the hydrological cycle.  Globally volumes."— Presentation transcript:

1 Evaporation in Texas CE 394K.2 Spring 2007

2 Evaporation In Texas  Evaporation is an important component of the hydrological cycle.  Globally volumes evaporating in reservoirs exceeded the volume consumed to meet both domestic and industrial needs.  Globally volumes evaporating in reservoirs exceeded the volume consumed to meet both domestic and industrial needs. CE 394K.2 - Spring 2007 Smith

3 Evaporation In Texas  Several groups monitor evaporation in Texas.  Texas has 77 reservoirs –98 percent of total conservation storage –Must have a capacity of 5,000 acre-feet or more. –Must have a capacity of 5,000 acre-feet or more. CE 394K.2 - Spring 2007 Smith

4 Evaporation Data  Pan Evaporation –Army Corp of Engineers –Texas Water Development Board  NARR Data –Evaporation –Potential Evaporation CE 394K.2 - Spring 2007 Smith

5 Lake Grapevine CE 394K.2 - Spring 2007 Smith

6 Capacity Variations in Lake Grapevine CE 394K.2 - Spring 2007 Smith

7 Evaporation Impact on Lake Grapevine CE 394K.2 - Spring 2007 Smith

8 Evaporation at Lake Grapevine

9 Observed Data Compared to Calculated Values CE 394K.2 - Spring 2007 Smith

10 Evaporation in Lake Grapevine Over Time Evaporation Potential Evaporation

11 Evaporation in Texas Reservoirs

12 Comparing Methods by Maximum Temperature CE 394K.2 - Spring 2007 Smith

13 Comparing Maximum Temperature Method at Lake Grapevine

14 Conclusions  Evaporation has a substantial impact on Texas’s water resources and water planning  There are several reliable sources of evaporation data for Texas –NARR Data –Army Corps of Engineers CE 394K.2 - Spring 2007 Smith

15 Any Questions? CE 394K.2 - Spring 2007 Smith

16 Evaporation Compared to Drought

17 Water Loss in Lake Grapevine January349.00121712.791035.651766.965 February578.17962232.621246.8952163.995 March1171.0443066.572038.7142256.177 April1786.4733666.232441.4172814.222 May2378.2355037.5992562.8074886.785 June2070.3714219.83481.2724071.395 July761.33536332.6784181.1595446.273 August13.583976402.9463762.5056032.982 September177.38034575.5292781.1794287.126 October556.37552805.812166.0382654.217 November588.60421406.9841525.5841442.051 December354.70221120.8481168.131362.818 Yearly Total 10785.2942580.428391.3539185.01

18 Evaporation in Texas CE 394K.2 - Spring 2007 Smith


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