14 CFR PART 61 CERTIFICATION: PILOTS, FLIGHT INSTRUCTORS, AND GROUND INSTRUCTORS 01/20/2004.
Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B....
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Transcript of Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B....
![Page 1: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/1.jpg)
Edward’s Aquifer Ground-water Flow Model
Texas Ground Water 2004November 19, 2004George B. Ozuna
![Page 2: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/2.jpg)
Edwards Aquifer Model
• In cooperation with: Edwards Aquifer Authority Department of Defense USGS
• Richard Lindgren, USGS• Sue Horvorka and Alan Dutton, BEG• Scott Painter, SwRI• Steve Worthington, Consultant
![Page 3: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/3.jpg)
![Page 4: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/4.jpg)
Edwards Aquifer Model
• Uniform ¼-mi grid • 370 rows; 700 columns; 259,000 cells• One layer• Grid alignment:
Major faults and flow near Comal and San Marcos Springs
![Page 5: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/5.jpg)
Structure
• Aquifer top elevation• Aquifer bottom elevation• Faults
Provided by BEG – Sue Horvorka
![Page 6: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/6.jpg)
Faults
• Simulated using Horizontal Flow Barrier Package
• Model inputs: fault location hydraulic characteristic (C)
o hydraulic conductance termo Assumption: hydraulic characteristic (C) is a
function of fault displacement inversely proportional
![Page 7: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/7.jpg)
Las Moras Springs
Leona Springs
San Antonio & San Pedro Springs
Comal Springs
San Marcos Springs
Fault
Simulated Faults And Springs
![Page 8: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/8.jpg)
General-head boundary
No-flow boundary – saline water line
General-head boundary
No-flow
Colorado River – Head-dependent flux boundary
No- flow
Recharge zone
Model Boundary Conditions
![Page 9: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/9.jpg)
Hydraulic Conductivity
Provided by Southwest Research – Scott Painter
![Page 10: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/10.jpg)
Conduits
Provided by EAA Consultant - Steve Worthington
![Page 11: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/11.jpg)
Hydraulic Properties
![Page 12: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/12.jpg)
Simulated Recharge Zones
![Page 13: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/13.jpg)
Recharge Zone - Stream Channels
![Page 14: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/14.jpg)
Pumpage – by use
Provided by BEG – Alan Dutton
![Page 15: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/15.jpg)
Pumpage – by rate
Provided by BEG – Alan Dutton
![Page 16: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/16.jpg)
Steady-State Calibration
• Calibration period: 1939 – 1946• Pre-1950’s drought, minimal irrigation
development• Near-normal precipitation• San Antonio precipitation: normal 1961-90 30.98 in/yr average 1939-46 30.47 in/yr
![Page 17: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/17.jpg)
Steady-State Target Wells
144 wells
![Page 18: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/18.jpg)
Steady-State Calibration
![Page 19: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/19.jpg)
Transient Calibration
• Calibration period: 1947 – 2000• Calibration targets:
Long-term record wellso County Index wellso match hydrographs
Selected time periodso periods of above- and below-normal precipitationo match hydraulic heads for a set of wells
![Page 20: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/20.jpg)
Transient Calibration
• Selected time periods Below-normal precipitation
o 1952-57 May thru November 1956 175 wells
Above-normal precipitationo 1973-77
November 1974 thru July 1975 172 wells
![Page 21: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/21.jpg)
Transient Target Wells
Drought Conditions, 175 Wells, May – November 1956
![Page 22: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/22.jpg)
Transient Target Wells
Wet Conditions, 172 Wells, November 1974 – July 1975
![Page 23: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/23.jpg)
Transient Target Springs
• 5 springs simulated: San Marcos Comal Leona San Pedro* San Antonio*
*Based on relation with Bexar index well
![Page 24: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/24.jpg)
Uvalde Index Well
Medina Index Well
Comal Well
San Marcos Well
Transient ResultsWater-Level Hydrographs
Bexar Index Well
![Page 25: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/25.jpg)
Transient ResultsWater-Level Hydrographs
Uvalde_index(south-central Uvalde County)
810
820
830
840
850
860
870
880
890
900
910
920
930
1/1/1947
1/1/1949
1/1/1951
1/1/1953
1/1/1955
1/1/1957
1/1/1959
1/1/1961
1/1/1963
1/1/1965
1/1/1967
1/1/1969
1/1/1971
1/1/1973
1/1/1975
1/1/1977
1/1/1979
1/1/1981
1/1/1983
1/1/1985
1/1/1987
1/1/1989
1/1/1991
1/1/1993
1/1/1995
1/1/1997
1/1/1999
1/1/2001
Date
Ele
va
tio
n
Measured
Simulated
![Page 26: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/26.jpg)
Transient ResultsWater-Level Hydrographs
Medina_6841301(east-central Medina County)
600610620630640650660670680690700710720730740750760770780
1/1/1950
1/1/1952
1/1/1954
1/1/1956
1/1/1958
1/1/1960
1/1/1962
1/1/1964
1/1/1966
1/1/1968
1/1/1970
1/1/1972
1/1/1974
1/1/1976
1/1/1978
1/1/1980
1/1/1982
1/1/1984
1/1/1986
1/1/1988
1/1/1990
1/1/1992
1/1/1994
1/1/1996
1/1/1998
1/1/2000
Date
Ele
va
tio
n
Measured
Simulated
![Page 27: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/27.jpg)
Transient ResultsWater-Level Hydrographs
Bexar_index(central Bexar County)
600
610
620
630
640
650
660
670
680
690
700
710
1/1/1947
1/1/1949
1/1/1951
1/1/1953
1/1/1955
1/1/1957
1/1/1959
1/1/1961
1/1/1963
1/1/1965
1/1/1967
1/1/1969
1/1/1971
1/1/1973
1/1/1975
1/1/1977
1/1/1979
1/1/1981
1/1/1983
1/1/1985
1/1/1987
1/1/1989
1/1/1991
1/1/1993
1/1/1995
1/1/1997
1/1/1999
1/1/2001
Date
Ele
va
tio
n
Measured
Simulated
![Page 28: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/28.jpg)
Transient ResultsWater-Level Hydrographs
Comal_6823701(central Comal County)
600
610
620
630
640
650
660
670
680
690
1/1/1947
1/1/1949
1/1/1951
1/1/1953
1/1/1955
1/1/1957
1/1/1959
1/1/1961
1/1/1963
1/1/1965
1/1/1967
1/1/1969
1/1/1971
1/1/1973
1/1/1975
1/1/1977
1/1/1979
1/1/1981
1/1/1983
1/1/1985
1/1/1987
1/1/1989
1/1/1991
1/1/1993
1/1/1995
Date
Ele
va
tio
n
Measured
Simulated
![Page 29: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/29.jpg)
Transient ResultsWater-Level Hydrographs
Hays_5858101(eastern Hays County)
530540550560570580590600610620630640650660670
1/1/1947
1/1/1949
1/1/1951
1/1/1953
1/1/1955
1/1/1957
1/1/1959
1/1/1961
1/1/1963
1/1/1965
1/1/1967
1/1/1969
1/1/1971
1/1/1973
1/1/1975
1/1/1977
1/1/1979
1/1/1981
1/1/1983
1/1/1985
1/1/1987
1/1/1989
1/1/1991
1/1/1993
1/1/1995
1/1/1997
1/1/1999
1/1/2001
Date
Ele
va
tio
n
Measured
Simulated
![Page 30: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/30.jpg)
Leona Springs
Comal Springs
San Marcos Springs
Transient ResultsSpringflow Hydrographs
![Page 31: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/31.jpg)
Transient ResultsSpringflow Hydrographs
Comal Springs
0
5,000,000
10,000,000
15,000,000
20,000,000
25,000,000
30,000,000
35,000,000
40,000,000
45,000,000
50,000,000
1/1/1947
1/1/1949
1/1/1951
1/1/1953
1/1/1955
1/1/1957
1/1/1959
1/1/1961
1/1/1963
1/1/1965
1/1/1967
1/1/1969
1/1/1971
1/1/1973
1/1/1975
1/1/1977
1/1/1979
1/1/1981
1/1/1983
1/1/1985
1/1/1987
1/1/1989
1/1/1991
1/1/1993
1/1/1995
1/1/1997
1/1/1999
1/1/2001
Date
Flo
w in
cu
bic
fe
et
pe
r d
ay
Measured
Simulated
![Page 32: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/32.jpg)
Transient ResultsSpringflow Hydrographs
San Marcos Springs
0
5,000,000
10,000,000
15,000,000
20,000,000
25,000,000
30,000,000
35,000,000
40,000,000
45,000,000
1/1/1947
1/1/1949
1/1/1951
1/1/1953
1/1/1955
1/1/1957
1/1/1959
1/1/1961
1/1/1963
1/1/1965
1/1/1967
1/1/1969
1/1/1971
1/1/1973
1/1/1975
1/1/1977
1/1/1979
1/1/1981
1/1/1983
1/1/1985
1/1/1987
1/1/1989
1/1/1991
1/1/1993
1/1/1995
1/1/1997
1/1/1999
1/1/2001
Date
Flo
w in
cu
bic
fe
et
pe
r d
ay
Measured
Simulated
![Page 33: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/33.jpg)
Transient ResultsSpringflow Hydrographs
Leona Springs
0
2,000,000
4,000,000
6,000,000
8,000,000
10,000,000
12,000,000
1/1/1947
1/1/1949
1/1/1951
1/1/1953
1/1/1955
1/1/1957
1/1/1959
1/1/1961
1/1/1963
1/1/1965
1/1/1967
1/1/1969
1/1/1971
1/1/1973
1/1/1975
1/1/1977
1/1/1979
1/1/1981
1/1/1983
1/1/1985
1/1/1987
1/1/1989
1/1/1991
1/1/1993
1/1/1995
1/1/1997
1/1/1999
1/1/2001
Date
Flo
w in
cu
bic
fe
et
pe
r d
ay
Measured
Simulated
![Page 34: Edward’s Aquifer Ground-water Flow Model Texas Ground Water 2004 November 19, 2004 George B. Ozuna.](https://reader036.fdocuments.in/reader036/viewer/2022082203/5697bf781a28abf838c81dbe/html5/thumbnails/34.jpg)
Edwards Aquifer Model
• Model Inputs Structure Boundary Conditions Hydraulic Properties Stresses
• Model Calibration Targets Steady-State Results Transient Results