GROUNDWATER RESOURCES MANAGEMENT CHALLENGES AND COOPERATION IN THE USA-MEXICO BORDER

COMISIÓN INTERNACIONAL DE LÍMITES Y AGUAS ENTRE MÉXICO Y LOS ESTADOS UNIDOS

SECCIÓN MEXICANA SECCIÓN MEXICANA

Ing. Luis Antonio Rascón Mendoza

UNESCO-IHP TRANSBOUNDARY AQUIFERS HYDROGEOLOGY AND INTERNACIONAL LAW

GROUNDWATER RESOURCES MANAGEMENT CHALLENGES AND COOPERATION IN THE USA-MEXICO BORDER

PARIS FRANCIA 7 9 DE MARZO DE 2005

PARIS, FRANCIA, 7-9 DE MARZO DE 2005

International Water Treaties

AREAS DE CUENCAS INTERNACIONALES AREAS DE CUENCAS INTERNACIONALES

WYOMING

CUENCA RIO TIJUANA TOTAL = 4,424 km2 E U A = 1,221 km2 MEXICO = 3,203 km2

COLORADO U T A H

NEVADA

CUENCA RIO COLORADO TOTAL = 634,840 km2 E U A = 631,000 km2 MEXICO = 3 840 km2

CALIFORNIA

ARIZONA

NUEVO MEXICO

MEXICO = 3,840 km2

CUENCA RIO BRAVO TOTAL 444 560 k 2

TEXAS SONORA

TOTAL = 444,560 km2 E U A = 229,798 km2 MEXICO = 214,762 km2

N

TEXAS CHIHUAHUA

COAHUILA

GOLFO OCEANO

RIO COLORADO MEX.= 1,850 Mm3/Año

DERIVACIONES:

N

DURANGO NUEVO

LEON

GOLFO DE MEXICO PACIFICO

RIO BRAVO

MEX.= 74 Mm3/Año E.U. = 431.7 Mm3/Año

Comisión Internacional de Límites y Aguas

CUENCAS.PRE

E.U. 431.7 Mm3/Año

SHARED AQUIFERS: EXISTING CONDITIONS SHARED AQUIFERS: EXISTING CONDITIONS

N

B a ja C

a lif N te

1

3 4 5 6

2

C hihuahua

Coahuila N . L e ó

n S onora

ifo rn ia te

7

1.- AC U IFER O D EL VALLE D E M EXICALI 2.- CU EN C A D EL R IO SO N O ITA

3.- CU EN C A D EL R IO SA NTA C RU Z 4.- CU EN C A D EL R IO SA N PED RO

5.- ZO N A D EL AC U IFERO CO N EJO S-M ED AN O S 6.- AC U IFER O D EL VALLE D E JU AR EZ

n

Tam aulipas

7.- CAM PO DE PO ZO S D E O BSER VAC IO N DE LA AM ISTAD

ƒ NO INTERNATIONAL TREATY ON GROUNDWATER

ƒ MAIN AQUIFERS OF COMMON INTERES ARE < 10% OF THE BORDER LENGTH

ƒ DIFERENT JURISDICTIONS IN EACH COUNTRY

ƒ BIG ASIMETRY; LEVEL OF STUDIES LOCAL CAPACITY RESOURCES

ƒ BIG ASIMETRY; LEVEL OF STUDIES, LOCAL CAPACITY, RESOURCES, PRIORITIES

ƒ ISSUES ADDRESSED IN A CASE BY CASE BASIS THROUGH CILA ISSUES ADDRESSED IN A CASE BY CASE BASIS THROUGH CILA

SHARED AQUIFERS

EXISTING AGREEMENTS:

CILA’S MINUTE 242 FORSEES CONSULTATIONS

CILA’S MINUTE 289 ON WATER QUALITY MONITORING, SURFACE AND GROUNDWATER

SPECIFIC AGREEMENT FOR EXCHANGE OF INFORMATION SPECIFIC AGREEMENT FOR EXCHANGE OF INFORMATION, ASSESMENT, MODELING, PUBLIC REPORT (HUECO BOLSON)

PERIODIC EXCHANGE OF INFORMATION FOR OTHER AQUIFERS

PERIODIC EXCHANGE OF INFORMATION FOR OTHER AQUIFERS

(IN THE SPIRIT OF COOPERATION )

SHARED AQUIFERS

EXISTING MECHANISMS AND STIPULATIONS.

EXISTING INSTITUTIONS FOR REGULATION & COOPERATION

C S C G O O SS S

CILA IS ENCHARGED OF BOUNDARY AND WATER ISSUES BETWEEN THE TWO COUNTRIES

EXCHANGE OF INFORMATION JOINT STUDIES AND CONFLICT EXCHANGE OF INFORMATION, JOINT STUDIES, AND CONFLICT RESOLUTION HAS TAKEN PLACE THROUGH CILA

LEGAL BASES LEGAL BASES

CILA WAS CREATED BY AN INTERNATIONAL TREATY BETWEEN THE GOVERNMENTS OF MEXICO & USA

STIPULATIONS FOR GROUNDWATER DISTRIBUTION

MINUTE 242 ALLOWS EACH COUNTRY TO PUMP 197 Mm3/yr

FROM A 8KM BORDER STRIP IN SAN LUIS NOTHING SAYS FOR

FROM A 8KM BORDER STRIP IN SAN LUIS. NOTHING SAYS FOR

THE REST OF THE BORDER. A GENERAL AGREEMENT IS

FORSEEN.

SHARED AQUIFERS

COOPERATION EFFORTS

•EXCHANGE OF INFORMATION

•JOINT STUDIES: BINATIONAL REPORTS; MODELING;

GROUNDWATER QUALITY STUDIES; WELLHEAD PROTECTION GROUNDWATER QUALITY STUDIES; WELLHEAD PROTECTION PROGRAMS;

G C S O S

•EMERGENCY RESPONSE

•CONFLICTS SOLUTION;

•CONFLICTS SOLUTION;

•SUPPORT UNIVERSITIES AND NGO’S EFFORTS

HUECO BOLSON AQUIFER HUECO BOLSON AQUIFER

CILA AGREEMENT CILA AGREEMENT

PURPOSE:

• Publication of a

• Publication of a

Binational report with data exchanged

data exchanged through CILA.

• Joint development of an f

aquifer model.

CILA AGREEMENT: Binational Report CILA AGREEMENT: Binational Report CILA AGREEMENT: Binational Report CILA AGREEMENT: Binational Report

• CILA evaluation of the information and the binational report p

• Use of data exchanged through CILA

• Establishment of a Binational Working Group.

• Binational report in Spanish & English and should be submitted for CILA’S approval

for CILA S approval.

• Binational report should show information and basic

• Binational report should show information and basic conclusions, avoiding interpretation.

• Each country to provide the funds needed to develop its share

of this project.

CILA AGREEMENT: Aquifer Model CILA AGREEMENT: Aquifer Model

• Two models acceptable to both parties

• Common zone in both sides of the border

• Each country shall include at least the common zone, the shallow aquifer and the deep aquifer.

• Each country may extend the model to the other country beyond the common zone using only information exchanged through CILA

through CILA.

• The BWG will discuss all the details of the model in the common zone

the model in the common zone

• A water quality model or optimization

model may be developed in the future.

WELLHEAD PROTECTION WELLHEAD PROTECTION WELLHEAD PROTECTION WELLHEAD PROTECTION

• Protection areas for each well were

defined defined.

• Pollution elements were identified

were identified

• Field trips

• Reports by

• Reports by

responsible authority in each country y

• Exchange of reports

Emergency Response Emergency Response g g y y p p

• Events with potential to impact the aquifer

N tifi ti t th iti

• Notification to authorities

• Problem, source, actions, follow up

follow up.

SUPPORT EFFORTS OF UNIVERSITIES & ONG’S SUPPORT EFFORTS OF UNIVERSITIES & ONG’S

• PASO DEL NORTE WATER TASK FORCE

– Managers, users, experts, public are involved – Regional issues

– Identifies solutions to water issues

– Identifies priorities, provides information to

community, submits recommendations to authorities.

SCERP: Southwest Center for Enviromental Research & Policy

– Supports research in universities from both countries.

– 5 Universities in México and 5 in USA.

– CILA recomendations are considered in research

subjects

OG S

OG S O S O S C C NOGALES

NOGALES--RIO SANTA CRUZ RIO SANTA CRUZ

MONITOREO CONJUNTO DE LA CALIDAD DE LAS AGUAS

RESULTADOS DE MONITOREO DE SEPTIEMBRE DE 1997 (U.S.)

SUBTERRANEAS EN EL AREA DE NOGALES, SONORA - NOGALES, ARIZONA

NOGALES, ARIZONA.

NOGALES, ARIZONA.

13

12

Nitratos: 2.6 mg/L As: 0.01 mg/L Nitratos: 2.2 mg/L

12

PCE: 0.0042 mg/L As: 0.005 mg/L Nitratos: 8 8 mg/L

PCE: 0.0012 mg/L Nitratos: 2.8 mg/L As: 0.052 mg/L g

1) PARQUE INDUSTRIAL 2) PLANTA PEMEX 3) FERROCARRIL

4) CAMINO VIEJO A CANANEA 5) CRUZ ROJA

10 10 9 8 Nitratos: 8.8 mg/L 11 Cloroformo: 0.0017 mg/L m-Xileno:0.0017 mg/L

Nitratos: 18.5 mg/L As: 0 014 mg/L

Nitratos: 10.7 mg/L As: 0.033 mg/L

6) LA TOMATERA

7) NORIA OFICINA COAPAES 8) ADEQ #1

9) ADEQ#2

10) ARROYO TRICKEY

11) ANTIGUO RELLENO SANITARIO 12) AREA DE WINGFIELD

13) ARROYO EL POTRERO 8

7 5

PCE: 0.0449 mg/L Nitratos: 9.9 mg/L Coliformes As: 0.014 mg/L

Destruido

13) ARROYO EL POTRERO 6

4 3 2

Fe: 4.63 mg/L Mn: 5.17 mg/L

sec-Butilbenceno: 0.002 mg/L cis-1,2-Dicloroetileno: 0.0015 mg/L Isopropilbenceno: 0.0009 mg/L 1,1-Dicloroetano: 0.0008 mg/L PCE: 0.0053 mg/L

TCE: 0.0034 mg/L Cloroformo: 0.0016 mg/L Trihalometanos:0.0016 mg/L Nitratos: 6.4 mg/L

NOGALES, SONORA.

COMISION INTERNACIONAL DE LIMITES Y AGUAS SECCION MEXICANA

2 1

Cloruro de Vinilo: 0.0006 mg/L Benceno: 0.0005 mg/L

Nitratos: 3.1 mg/L Coliformes PCE: 0.0011 mg/L

Fe: 5.58 mg/L Mn: 2.93 mg/L Fe: 9 mg/L: Coliformes

NOV. 97 ESC.: SIN ESCALA

ARCHIVO: K:\CLAUDIO\MAPA1.PRE

LOCALIZACION DE LOS POZOS DE MONITOREO

Benceno: 0.0006 mg/L

n-Butilbenceno: 0.0039 mg/L

sec-Butilbenceno: 0.0047 mg/L

Isopropilbenceno: 0.0058 mg/L

Propilbenceno: 0.0091 mg/L

MONITOREO CONJUNTO DE LA CALIDAD DE LAS AGUAS SUBTERRANEAS EN EL AREA DE

NOGALES, SONORA - NOGALES, ARIZONA

RESULTADOS DE MONITOREO DE FEBRERO DE 1998 (Mx)

NOGALES, SONORA NOGALES, ARIZONA

13

12

Nitratos: 9.1 mg/L As: 0.0007 mg/L

11

PCE: 0.00964 mg/L As: 0.0045 mg/L

1) PARQUE INDUSTRIAL 2) PLANTA PEMEX 3) FERROCARRIL

4) CAMINO VIEJO A CANANEA 5) CRUZ ROJA

6) LA TOMATERA

10 10 9 8

Nitratos: 9.1 mg/L Coliformes

Nitratos: 17.6 mg/L As: 0.0145 mg/L

6) LA TOMATERA

7) NORIA OFICINA COAPAES 8) ADEQ #1

9) ADEQ#2

10) ARROYO TRICKEY

11) ANTIGUO RELLENO SANITARIO 12) AREA DE WINGFIELD

13) ARROYO EL POTRERO

7 5

PCE: 0.02568 mg/L Nitratos: 10.1 mg/L As: 0.0031 mg/L Coliformes Destruido

13) ARROYO EL POTRERO

6 4

3 2

Fe: 3.02 mg/L Mn: 3.02 mg/L As: 0.0009 mg/L Coliformes PCE: 0.00478 mg/L

Nitratos: 8.8 mg/L

NOGALES, SONORA.

COMISION INTERNACIONAL DE LIMITES Y AGUAS SECCION MEXICANA

2 1

Nitratos: 5.1 mg/L As: 0.004 mg/L Coliformes Fe: 3.56 mg/L

Mn: 2.46 mg/L As: 0 0011 mg/L

NOV. 97

ESC.: SIN ESCALA

ARCHIVO: K:\CLAUDIO\MAPA1.PRE

LOCALIZACION DE LOS POZOS DE MONITOREO

Coliformes

As: 0.0011 mg/L

S G O O O

S G O O O

SEGMENTO MEDIO DEL BRAVO

SEGMENTO MEDIO DEL BRAVO

AQUIFERS WITHIN AQUIFER WITHIN THE AREA STUDY AREA

KERRVILLE

AUSTIN

BOERNE SONORA

JUNCTION

FREDERICKSBURG

VAL VERDE TERRELL

EDWARDS

KERR SUTTON

REAL KIMBLE

HAYS GILLESPIE

BLANCO CROCKETT

KENDALL

PECOS TRAVIS

BREWSTER

WILLIAMSON

AQUIFERS WITHIN STUDY AREA AQUIFER WITHIN THE AREA

"

)

"

"

) )

SAN ANTONIO

ST. HEDWIG DEL RIO

SEGUIN NEW BRAUNFELS

HONDO

UVALDE

POTH PLEASANTON

DEVINE

PEARSALL BRACKETTVILLE

LEAKEY

FRIO UVALDE

KINNEY

BEXAR MEDINA

ZAVALA

WILSON BANDERA

COMAL

GUADALUPE

KARNES JIMENEZ

SAN CARLOS CIUDAD ACUÑA

"

"

) )

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

"

)

)

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)

"

)

"

)

35

COAHUILA

FREER EAGLE PASS

CRYSTAL CITY

COTULLA ASHERTON

FRIO

DIMMIT ZAVALA

LA SALLE MAVERICK

ATASCOSA

LIVE OAK McMULLEN

KARNES

NAVA

PALAU CLOETE SABINAS

MORELOS

HIDALGO ALLENDE

ZARAGOZA

RIO BRAVO

VILLA UNION ALAMOS, LOS

NUEVA ROSITA

PIEDRAS NEGRAS

SAN JUAN DE SABINAS CIUDAD MELCHOR MUZQUIZ

COLONIA VENUSTIANO CARRAN ZA

±

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

COAHUILA

TAM AU LAREDO

ALICE

FALFURRIAS WEBB

DUVAL

ZAPATA

JIM HOGG

BROOKS JIM WELLS

OCAMPO

HIDALGO

CANDELA

ANAHUAC

MONCLOVA LAMADRID

FRONTERA

CASTAÑOS NADADORES SACRAMENTO

NUEVO LAREDO

OCHO DE ENERO ESPERANZAS, LAS

PRIMERO DE MAYO SAN JOSE DE AURA

MINAS DE BARROTERAN

LAMPAZOS DE NARANJO CUATROCIENEGAS DE CARRANZA

MINAS LA FLORIDA (FLORIDA, LA)

"

)

"

)

"

)

"

)

"

)

"

)

"

)

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)

"

)

"

) )

AU LIPA

S NUEVO LEON

EDINBURG RIO GRANDE CITY

STARR

HIDALGO MIER

CASTAÑOS

BUSTAMANTE

AGUALEGUAS GUERRA, LOS CIUDAD CAMARGO CIUDAD DE VILLALDAMA

CIUDAD MIGUEL ALEMAN NUEVA CIUDAD GUERRERO

CIUDAD SABINAS HIDALGO

Location Map

AS

TER WA

ME NT OP EL D EV

BO

Legend

Cities

Study Area Boundary

Plano de Localización Simbología

Ciudades Area de Estudio

0 25 50 100 150

Kilometers

E AX T

BOA R D

y y

Carrizo-Wilcox aquifer (outcrop) Carrizo-Wilcox aquifer (downdip) Allende-Piedras Negras Valley aquifer Edwards-Trinity aquifer system (outcrop) Edwards-Trinity aquifer system (downdip) Area of Interest

Map prepared by Mark Hayes Texas Water Development Board

April 30, 2002 TEXAS

MEXICO

Area de Estudio

Acuífero Carrizo-Wilcox (afloramiento) Acuífero Carrizo-Wilcox (parte baja)

Acuífero del Valle de Allende-Piedras Negras Sistema acuífero Trinity-Edwards

Sistema acuífero Trinity-Edwards (parte baja) Area de interés

Kilómetros

Plano preparado por Mark Hayes Texas Water Development Board

30 de abril de 2002

GEOLOGY

GEOLOGY ^GEOLOGY

R D EVELOP

GEOLOGY

E ASX T TER A W

MEN T OP L

BOA

R D

COAHUILA

Legend

Alluvium

Alluvial fan deposits and colluvium Windblown deposits Fluviatile and terrace deposits Playa deposits

Uvalde Gravel/Sabinas Conglomerate Jackson Group

Yegua Formation Laredo Formation El Pico Clay Bigford Formation

Simbología

Aluvión

Depósitos y Coluvión del abanico Aluvial Depósitos de Ventiscas

Depósitos Fluviátiles y de terrazas Depósitos de playa

Gravilla de Uvalde/Conglomerado de Sabinas Grupo Jackson

Formación Yegua Arcilla El Pico

F ió Bi f d

Formación Laredo

NUEVO LEON _T

A M A U

L IP A

Bigford Formation Carrizo Formation Indio Formation Kinkaid Formation Cretaceous igneous rocks Escondido Formation Olmos Formation San Miguel Formation

San Miguel, Olmos & E scondido formations, undivided Upson Clay

Austin Chalk Anacacho Limestone

Austin Chalk & Boquillas Flags, undivided Austin Chalk & Eagle Ford Group, undivided Eagle Ford Group

Eagle Ford Group, Buda Limestone & Del Rio Clay, undivided Buda Limestone & Del Rio Clay, undivided

Buda Limestone & Del Rio Clay & Boquillas Flags, undivided Boquillas Flags

Boquillas Flags & Austin Chalk, collapsed areas Buda Limestone

±

Formación Bigford Formación Carrizo Formación Indio Formación Kinkaid

Rocas Igneas del Cretáceo Formación Escondido Formación Olmos

Formación San Miguel

Formacs. no divididas San Miguel, Olmos y Escondido Arcilla Upson

Yeso Austin Caliza Anacacho

Yeso Austin y Lajas Boquillas, no divididas Yeso Austin y Grupo Eagle Ford, no divididas Grupo Eagle Ford

Grupo Eagle Ford, Caliza Buda y Arcilla Del Río, no div.

Caliza Buda y Arcilla Del Río, no divididas Caliza Buda, Arcilla Del Río y Lajas Boquillas, no divid.

Lajas Boquillas

Lajas Boquillas y Yeso Austin, áreas hundidas

Caliza Buda P

A S

Del Rio Clay Devils River Limestone Fort Terrett Member McKnight Formation West Nueces Formation

West Nueces Formation & Glen Rose Formation, undivided McKnight, West Nueces & Glen Rose formations, undivided Segovia Member

Salmon Peak Limestone

Glen Rose Formation 0 15 30 60 90 120

Kilometers

±

Map prepared by Mark Hayes, Texas Water Development Board

April 24, 2002

Plano preparado por Mark Hayes 24 de abril de 2002 Caliza Buda

Arcilla Del Río Caliza Río Devils

Elemento Fort Terrett Formación McNight

Formación West Nueces

Formaciones West Nueces y Glen Rose, no divididas Formacs. no divid. McNight, West Nueces y Glen Rose Elemento Segovia

Caliza Salmon Peak

Formación Glen Rose Kilómetros

209 Le on

a R iv N ue

ce s R

Y # Y #

# #

#

#

#

###

#

#

#

#

# # #

#

#

## #

#

#

#

#

#

2 00

100

110 120

130 140 210

220

150 170 180 190

1 80

96 94

98

94 209 211

219 162 209

190 190 195

184 172 146

198

209 190 143

136 181

188 122

139 125

128 113

103

La Pr yor Batesville

R ve r R iv e r

# Y

Y # Y #

Y #

# Y

#

# #

#

# #

#

#

# #

#

#

#

#

#

#

#

# #

#

#

#

# #

#

# #

#

#

#

#

# #

#

# #

#

#

#

#

80

70 19 0

210

70

90 1 0

1 1 0 0 1 2 0

94 74 80

77 89

79

77 79

72

67 70 87 87

74 69

67 97

80

73 62 69

175 146 121

201 107

112 191 117 101

128 191 164

174

176 116

140 Asherton

Big Wells Crystal City

Carrizo Springs

N e g ro C re e k

Y #

#

#

#

#

#

#

# # #

#

#

#

#

#

#

#

#

1 6 0 1 5 0

1 4 0

90

11 0 100

70

19

2 0 0

17 0

91 87 76

89

96 201

199

178 146 110 183

136 135

159 143

163

130 171

Cotulla

C re ek Ga ima n C ree k

N u ec e

s R iv e r

El Am ol e

La s R aic es C r ee k

# Y

Y #

#

#

# #

#

#

#

#

#

#

#

#

#

#

#

#

#

#

#

#

#

1 3 0

10 12 0 19 0

1 7 0

200 160

180 97 163

148 142 156

135 184

163 175 179

186 201

169 152 182 171 172 169 195

184 196

Encinal

Villa Hidalgo

o C re e k B e cc e ro C re e k C a rr iz it os C re

S a n ta Is a b e

l

R io G ra n d e

Y # Y #

Y # Y #

Y #

#

#

#

#

#

#

#

#

#

#

#

1 8 0 220

230 250

60

240 210

213 184

178 188 228 201

242 237 215 202 204

Laredo

196 192

Nuevo Laredo La Jarita

San Ignacio Colombia

S a la d o

El Carrizo e

C re e k

Carrizo - Wil cox aquifer Conf ined

Unconf ined Acuífero Carrizo - Wilcox

Confinado

No confinado Y ^#

Y #

##

##

194

228

El Cenizo 221

192

S N

E W

20 0 20 40 Km

Line of equal hydraulic head (m)

80

#

90 Water level in wel l

(meters above sea level)

Sources of data: TWDB, INEGI, and CFE.

No confinado

Línea de cargas hidráulicas iguales (m) Nivel freático en los pozos

(metros sobre el nivel del mar)

Fuente de información: INEGI, CFE y TWDB

Kilómetros

-70 -60 -50 -40 -30 -20 -10 0

1950 1960 1970 1980 1990 2000

P rofundida d a l a gua (m)

Año Pozo 77-01-311

-70 -60 -50 -40 -30 -20 -10 0

1940 1950 1960 1970 1980 1990 2000

P rofundida d a l a gua (m)

Año Pozo 69-59-401

m )

-130 -120 -110 -100 -90 -80 -70 -60

1960 1970 1980 1990 2000

Pozo 77-18-516

P rofundida d a l a gua (m) Año

#

# Y Y

#

#

#

La P ryo r Bat es vill e

P rofundida d a l a gua (m)

-140 -130 -120 -110 -100 -90 -80 -70

1960 1970 1980 1990 2000

Pozo 77-12-702

Año

-70 P 77 30 502

(m) 10

P 77 25 401 (m) P rofundida d a l a gua ( m

-50 -40 -30 -20 -10 0 10 20

1950 1960 1970 1980 1990 2000

Pozo 76-07-901

Año

S

Y #

#

# Y Y

Y # Y #

#

#

#

# # #

# #

#

#

Co t ull a Ash e rto n

Big W ells Cry sta l C it y

Carrizo Springs

-140 -130 -120 -110 -100 -90 -80

1960 1970 1980 1990 2000

Pozo 77-30-502

P rofundida d a l a gua ( g ua (m) Año -80

-70 Pozo 77-39-301

g ua (m)

20

30 Pozo 76-48-801

-60 -50 -40 -30 -20 -10 0

1950 1960 1970 1980 1990 2000

Pozo 77-25-401

P rofundida d a l a gua Año

# Y

Y #

Y #

#

#

#

#

E nc in al

Co lo m b ia V illa Hi da lg o Ri o

P rofundida d a l a g

-140 -130 -120 -110 -100 -90

1960 1970 1980 1990 2000

Año

-50 -40

-30 Pozo 77-37-501

a gua (m)

-20 -10

0 Pozo 77-42-801

a gua (m) P rofundida d a l a g -40 -30 -20 -10 0 10

1960 1970 1980 Año 1990 2000

Y # Y #

Y # Y #

Y # Y #

La red o

E l C en iz o Nu ev o La red o

La Jar i ta S an Ig n acio

Co lo m b ia

-100 -90 -80 -70 -60

1950 1960 1970 1980 1990 2000

P rofundida d a l Año

20 -10 0

10 Pozo 77-64-401

a l a gua (m)

a l a gua (m)

50 -40 -30

-20 Pozo 85-04-401

-70 -60 -50 -40 -30

1930 1940 1950 1960 1970 1980 1990 2000

P rofundida d a l a

Año

-60 -50 -40 -30 -20

1950 1960 1970 1980 1990 2000

P rofundida d a Año

P rofundida d a

-90 -80 -70 -60 -50

1960 1970 1980 1990 2000

Año

Le on a R iv N u e

ce s R

Y # Y # ^{La Pr yor} _Batesville

R iv R er

iv e r

Y #

Y # Y #

Y # Y #

Asherton

Big Wells Crystal City

Carrizo Springs

N e g ro C re ek

Y Y # _Cotulla

e e k Ga ima n C ree k

N u ec e

s R iv er La s R aic es C r ee k

El Amo le

Y #

Y #

Villa Hidalgo

Encinal

o C re e k B e cc e ro C re e k C a rr iz it o s C re G

S a n ta Is a b

e l R io

G ra n de

Y #

# Y

# Y Y #

Y # Nuevo Laredo La Jarita

San Ignacio Colombia

Laredo

S a la d o C re

e k

El Carrizo

Surface streams Total dissolved solids (TDS, in mg/l)

TDS < 1000 1000 < TDS < 3000 3000 < TDS < 5000 TDS > 5000 Sólidos totales disueltos

(STD, en mg/l)

STD STD

STD STD

Corriente superficial Y #

# Y ^{El Cenizo}

S N

E W

20 0 20 40 Km

Carrizo - Wilcox aquifer Outcrop

Downdip

Sources of data: TWDB, INEGI, and CFE.

p Acuífero Carrizo - Wilcox

Afloramiento Límite profundo

Fuente de Información:

INEGI, CFE, TWDB

Kilómetros

RIO COLORADO: Lining of the All America RIO COLORADO: Lining of the All America

Canal Canal

• Impacts in México: Irrigation áreas, groundwater levels, salinity, ecology.

groundwater levels, salinity, ecology.

• México opposes the lining if impacts are t dd d

not addressed.

• Actions taken: exchange of information, g technical assesment, binational meetings, field trips, identifications of options to mitigate impacts.

• Implementation of options is being discussed; A win-win solution is expected.

5/10/2007

5/10/2007

CHALLENGES

CHALLENGES

CHALLENGES

•Inventory & Assessment as well as protection &

conservation of shared aquifers is important conservation of shared aquifers is important

•Use a CILA Minute to formalize this effort Use a CILA Minute to formalize this effort

•Start with a joint inventory and assessment, to build trust.

S ki f d t d l thi ff t i th ll

•Seeking funds to develop this effort in the all

border.

CHALLENGES

ELEMENTS FOR A CILA MINUTE ELEMENTS FOR A CILA MINUTE

•Description, background, purpose

D l & i t i i t d d t b (Q tit lit

•Develop & maintain an inventory and database (Quantity, quality, geometry, properties, recharge, discharge, water use ).

•Establishment of protection & conservation areas (criteria, studies, flow of information, responsible, regulation, pollutants, actions, recharge)

recharge)

•Consultations through CILA (review actions, information, l i )

consultation)

•Notification & emergency response Notification & emergency response (real, planned, potential, finding (real, planned, potential, finding the problem, actions)

•P blic in ol ement (Meetings P blic reports gro ps ith

•Public involvement (Meetings, Public reports, groups with

stakeholders)

CHALLENGES

BINATIONAL INVENTORY & ASSESMENT OF BINATIONAL INVENTORY & ASSESMENT OF

TRANSBOUNDARY AQUIFERS

•OBJETIVE (Aquifer assessment; Document, publish information useful to decision making people in both countries)

•JUSTIFICATION (Mutual benefit; build trust; avoid damage)

MAIN TASKS (id tifi ti i iti th i i t t d t

•MAIN TASKS (identification, prioritize, gathering, integrate, data base, GIS, characterize <depth, recharge, discharge, aquifer properties, use, water quality, geochemistry >, modeling)

p p , , q y, g y , g)

•FEDERAL-STATE-LOCAL INVOLVEMENT (Support; focus efforts; not interference share information)

efforts; not interference, share information)

G R A C I A S

G R A C I A S