Surface Water Hydrology at White River Lake, Texas

1
Surface Water HydrologyatWhite River Lake, Texas

• Presented by
• Shane Walker
• May 3, 2005
• CE 392K.2 Hydrology

2
Motivation

• Water Scarcity
• People Need Water

Ground Water
Surface Water
3
Outline

• Background Info
• Model Development
• Geometry
• Evaporation Usage
• Results

4
Background Information

• Who, Where, What, When, Why, How

5
Who?

• White River Municipal Water District
• Established in 1967
• Post, Crosbyton, Ralls, Spur, White River
• Services lt 10,000 people

6
Who?

• White River Water Treatment Plant
• Provides Superior drinking water to the MWD
• Source surface water from White River Lake
• Average Annual effluent 1.7 MGD
• Maximum effluent 4.5 MGD

7
Who?

• White River Lake
• Constructed 1962-1964
• Inflow White River (intermittent)
• Full Elevation 2372 ft
• Full Depth 45 ft
• Full Volume 31,846 acre-ft
• Full Area 2.5 sq. mi.

8
Where?

• White River Lake
• 40 mi. E of Lubbock

9
What?

• Software program to predict the usable life of
  the Lake
• Dependent upon evaporation and usage

10
Why?

• Lake Depletion rationing vs. alternative source?

11
How?

• develop mathematical model of the geometry of the
  lake
• values for evaporation and usage
• develop software to predict usable life

12
Historical Data
13
Historical Data
14
Historical Data
15
Historical Data
16
Historical Data
17
Historical Data
18
Historical Data
19
Model Development

• Geometry
• Evaporation Usage

20
Volume/Depth Regression

• Mathematical Model
• Of
• Lake Geometry

21
Data

• Volumetric Survey of White River Lake
• June 30, 1993
• prepared by the Hydrographic Survey Group
• published by the Texas Water Developement Board
• Sonar/Sounding
• Surface area vs. Elevation _at_ 0.1 ft interval

22
Analysis

• Input data into Microsoft Excel
• Used built-in regression tools
• Determined accuracy of correlation by R2

23
Results

• Determined best fit as Power function
• V(D) 5.3412 D2.2933
• D(V) 0.4827 V0.4358
• (R2 0.999) Good considering siltation

24
Evaporation Usage

• Water Consumption Data

25
Evaporation
6.2 ft
26
Domestic/Industrial Usage

• Industrial
• Oil Companies flood oil wells
• Decreasing
• Compare Domestic versus Industrial

27
Total Usage (DI)
28
Domestic Usage
29
Domestic/Industrial Usage
30
Domestic/Industrial Usage
31
Assumptions

• No Infiltration
• (clay soils)
• No precip or inflow (conservative)

32
Lake Level Model

• Evaporation Usage

33
Lake Level Model

• Start Elevation
• Evap
• Pumpage
• Final Elevation

34
Alternative Scenarios

• Case A No change (D 0)
• Case B Eliminate Industrial Usage
• Case C Limit plant flow
• Case D Eliminate all usage

35
Lake Level Model

• Input Data
• Date
• Full elevation
• Current surface elevation
• Lowest intake elevation
• Lake bottom elevation

36
Results
37
Benefits

• Educate planners and managers
• WRMWD
• Industrial will probably not be eliminated
• Simulate rationing by assuming winter usage
• Applied to any reservoir (water balance)

38
Model Improvements

• Change USDA evap to TWDB evap
• Add Precipitation into the model
• Calibrate the model to simulate dry spells

39
Conclusions

• Consider sustainable alternative supply

40
Questions?